WO2014198011A1

WO2014198011A1 - Optical device and optical network system

Info

Publication number: WO2014198011A1
Application number: PCT/CN2013/077033
Authority: WO
Inventors: 周恩宇; 徐之光; 王衡; 林华枫
Original assignee: 华为技术有限公司
Priority date: 2013-06-09
Filing date: 2013-06-09
Publication date: 2014-12-18
Also published as: CN105052055A; CN105052055B

Abstract

The present application provides an optical device and an optical network system. The optical device comprises an optical transmission device array, a planar optical waveguide, a first lens array, a wavelength division multiplexing optical filter, and an optical fiber array. The optical transmission device array comprises at least one optical transmission device. The planar optical waveguide comprises at least one first optical waveguide and at least one second optical waveguide. The first lens array comprises at least one first lens. The optical fiber array comprises at least one optical fiber. A first-waveband optical signal output by the optical transmission device is output through the first optical waveguide, and is formed into parallel lights through the first lens, the parallel lights then enter the wavelength division multiplexing optical filter and is reflected by the wavelength division multiplexing optical filter, focused by the first lens and then enters a second optical waveguide and then is output. By means of the mode, a wavelength division multiplexing optical filter can be integrated in an optical device, the structure is simple, and optical path loss is reduced.

Description

Optical device and optical network system

【技术领域】[Technical Field]

The invention belongs to the field of communication technologies, and in particular relates to an optical device and an optical network system.

【背景技术】【Background technique】

Currently, wavelength division multiplexed passive optical networks (Wave Division) are used in numerous fiber access network solutions. Multiplexing-Passive Optical Network, WDM-PON) has attracted much attention due to its greater bandwidth capacity and information security similar to peer-to-peer communication. However, the high cost of WDM-PON is the biggest obstacle to its practical commercial use, and the light source is the most influential factor in WDM-PON.

The optical network system is the core part of signal receiving and transmitting in the WDM-PON system, and the optical transceiver module includes an optical transceiver component and an external circuit. In order to support multiple users, optical devices are highly densely integrated into a trend in which four, eight, 32 or 64 transceivers are integrated into one optical device. The 4-way transceiver integration is less difficult to package in an optical device, and the OLT terminal can be upgraded gradually, thereby saving resources. But in this way, usually the optical network system requires two arrayed waveguide gratings (Arrayed Waveguide Grating, AWG), an AWG connection Tx (transmitting Device), responsible for the transmitter connection, and another AWG connection Rx (receiving device), responsible for the connection of the receiver, which greatly increases the cost.

In order to reduce costs, Wavelength Multiplexing Filters (Wave Division Multiplexing) Fliter) is integrated in 4-way optical devices. Since the optical active devices of the WDM-PON system are mainly reflective semiconductor amplifiers (Reflective Semiconductor Optical) Amplifier, RSOA), the RSOA emission normal and the illuminating plane are tilted, resulting in the distance between the exit point and the lens of each RSOA in the RSOA array, which causes the RSOA and the optical fiber to be directly coupled through the lens, which is not in accordance with the traditional spatial coupling form. It is therefore necessary to use a planar optical waveguide (Planar) Lightwave Circuit, PLC) solves the problem of direct coupling of RSOA to light array. Therefore, the key to realize the integration of the wavelength division multiplexing filter in the 4-way optical device is to realize the effective packaging of the wavelength division multiplexing filter and the PLC.

One of the existing ways of implementing the wavelength division multiplexing filter and the PLC package is to attach the wavelength division multiplexing filter to the end face of the PLC, the two waveguides cross each other, and the wavelength division multiplexing filter is placed At the intersection of the two waveguides, the splitting function is implemented. This method requires high processing precision for PLC grinding and polishing. Once the wavelength division multiplexing filter is not placed at the intersection of the two waveguides, the reflection loss will be very large. The other is to engrave the groove in the PLC. The wavelength division multiplexing filter is inserted into the groove to realize the splitting function. In this way, it is also necessary to engrave the groove exactly at the intersection of the two waveguides, and because of the dimensional tolerance of the wavelength division multiplexing filter and the groove, it is also easy to obliquely insert the wavelength division multiplexing filter into the slot. Increase the loss of reflected light.

【发明内容】 [Summary of the Invention]

The technical problem to be solved by the present application is to provide an optical device and an optical network system, which solves the problem that the optical wavelength loss is increased due to insufficient processing precision due to the combination of the existing wavelength division multiplexing filter and the PLC.

In view of this, the present application provides an optical device and an optical network system, which can integrate a wavelength division multiplexing filter in an optical device and combine with a PLC, and has a simple structure, is easy to implement, and can reduce optical path loss.

A first aspect of the present application provides an optical device, including: a light emitting device array, a planar optical waveguide, a first lens array, a wavelength division multiplexing filter, and an optical fiber array, wherein: the light emitting device array includes At least one light emitting device, the planar optical waveguide comprising at least one first optical waveguide and at least one second optical waveguide, the first lens array comprising at least one first lens, the optical fiber array comprising at least one optical fiber; a light emitting device for outputting an optical signal of a first wavelength band and transmitting the optical signal of the first wavelength band to the first optical waveguide; the first optical waveguide comprising a first end and a second end, Receiving an optical signal of a first wavelength band from the light emitting device from a first end, and outputting an optical signal of the first wavelength band to the first lens from a second end; the first lens for The optical signal of the first wavelength band is converted into parallel light and output to the wavelength division multiplexing filter; the wavelength division multiplexing filter is configured to reflect the parallel light and output the same to the first a lens; the first lens further The light reflected by the wavelength division multiplexing filter is focused and output to the second optical waveguide; the second optical waveguide includes a first end and a second end for receiving from the first end Focused light is output from the second end to the optical fiber; the optical fiber includes a first end and a second end for receiving light from the second optical waveguide from the first end, and Output from the second end.

In conjunction with the first aspect, in a first possible implementation of the first aspect, the optical device further includes a second lens array and a light receiving device array, the second lens array including at least one second lens, the light The receiving device array includes at least one light receiving device; the optical fiber is further configured to receive an optical signal of the second wavelength band from the second end, and output the optical signal of the second wavelength band from the first end to the a second optical waveguide, configured to receive an optical signal of the second wavelength band from the second end of the second optical waveguide, and to transmit the optical signal of the second wavelength band from the second optical waveguide The first end is output to the first lens; the first lens is configured to form an optical signal of the second wavelength band into parallel light and then incident on the wavelength division multiplexing filter; a sub-multiplexing filter for transmitting the parallel light to the second lens; the second lens for focusing and outputting the light transmitted by the wavelength division multiplexing filter To the light receiving device.

In conjunction with the first aspect, in a second possible implementation of the first aspect, the optical fiber is configured to receive an optical signal of the first wavelength band from the second end of the optical fiber, and the first wavelength band An optical signal is output from the first end of the optical fiber to the second optical waveguide; the second optical waveguide is configured to receive the optical signal of the first wavelength band from the second end of the second optical waveguide, And outputting from the first end of the second optical waveguide to the first lens; the first lens is configured to form an optical signal of the first wavelength band into parallel light and then incident on the wavelength division multiplexing filter a wavelength division multiplexing filter for reflecting the parallel light and then outputting to the first lens; the first lens for passing the wavelength division multiplexing filter The reflected light is focused and emitted to the first optical waveguide; the first optical waveguide is further configured to receive the focused light from the second end of the first optical waveguide, and from the first light a first end of the waveguide is output to the light emitting device; the light emitting device is configured to output the first optical waveguide After re-amplified output light.

In combination with the first aspect or the first and second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the wavelength division multiplexing filter is configured to be Between the first lens array and the second lens array.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the first planar optical waveguide and the second plane The optical waveguides are disposed along different paths, and the second end waveguide of the first optical waveguide is parallel to the first end waveguide of the second optical waveguide.

In combination with the first aspect or the first and second possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the first lens array is disposed on the planar optical waveguide The outside.

In conjunction with the first aspect or the first and second possible implementations of the first aspect, in a sixth possible implementation of the first aspect, the light emitting device is a reflective semiconductor optical amplifier.

In a second aspect, an optical network system is provided, the optical network system comprising the optical device of the first aspect or any of the possible implementations of the first aspect.

In conjunction with the second aspect, in a first possible implementation of the second aspect, the optical network system further includes an arrayed waveguide grating and a partial mirror, the arrayed waveguide grating including a branch end and a common end, the branch end Connecting to the second end of the optical fiber, the partial mirror is disposed at the common end: the arrayed waveguide grating is configured to filter an optical signal of a first wavelength band from an optical fiber, and output the optical signal to the partial reflection a partial mirror for transmitting a portion of the optical signal of the first wavelength band filtered by the arrayed waveguide grating to a transmission link, and filtering the light of the first wavelength band filtered by the arrayed waveguide grating Another portion of the signal is reflected back to the second end of the fiber.

In the above technical solution, a light emitting device array, a planar optical waveguide, a first lens array, a wavelength division multiplexing filter, and an optical fiber array are disposed in the optical device, wherein the light emitting device array includes at least one light emitting device, and the planar optical waveguide includes At least one first optical waveguide and at least one second optical waveguide, the first lens array includes at least one first lens, and the optical fiber array includes at least one optical fiber. In this way, the optical signal of the first wavelength band outputted from the light emitting device is incident on the first lens array through the first optical waveguide, and then reflected by the wavelength division multiplexing filter and returned to the first lens array, and is focused. After passing through the second optical waveguide, it is transmitted through the optical fiber to the system link. By providing a first lens array between the PLC and the wavelength division multiplexing filter, the light of the first wavelength band from the first optical waveguide is effectively returned to the second optical waveguide, thereby reducing reflection loss and processing precision to the PLC. There are also no strict requirements and multiple transmission needs can be achieved.

【附图说明】 [Description of the Drawings]

1 is a schematic structural view of an embodiment of an optical device of the present application;

2 is a schematic structural view of another embodiment of the optical device of the present application;

FIG. 3 is a schematic structural diagram of an embodiment of an optical network system according to the present application.

【具体实施方式】【detailed description】

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of an embodiment of an optical device of the present application. As shown in FIG. 1, the optical device 10 of the present application includes: a light emitting device array 11 (transmitting Device array, Tx array), planar optical waveguide 12 (PLC), first lens array 13 (grin lens array, GA), wavelength division multiplexing filter 14 (WDM) Filter), Fiber Lens Array 15 (FA), where:

The light emitting device array 11 includes at least one light emitting device 110. The planar optical waveguide 12 includes at least one first optical waveguide 120 and at least one second optical waveguide 121. The first lens array 13 includes at least one first lens 130, and the optical fiber array 15 At least one optical fiber 150 is included.

The first lens array 13 is disposed outside the planar optical waveguide 12. The first optical waveguide 120 and the second optical waveguide 121 are disposed along different paths, and the second end 120b of the first optical waveguide 120 and the first end 121a of the second optical waveguide 121 preferably form a parallel optical waveguide. The first end 120a of the first optical waveguide 120 is disposed adjacent to the light emitting device 110 and coupled to each other. The second end 120b of the first optical waveguide 120 is disposed adjacent to the first lens 130 and coupled to each other, and the second optical waveguide The first end 121a of the 121 is disposed adjacent to the first lens 130 and coupled to each other, and the second end 121b of the second optical waveguide 121 is disposed adjacent to the first end 150a of the optical fiber 150 and coupled to each other.

The light emitting device 110 is configured to output an optical signal of the first wavelength band, and send the optical signal of the first wavelength band to the first optical waveguide;

The first optical waveguide 120 includes a first end 120a and a second end 120b for receiving an optical signal from the first wavelength band of the light emitting device 110 from the first end 120a and an optical signal of the first wavelength band from the second end 120b. Output to the first lens 130;

The first lens 130 is used to convert the optical signal of the first wavelength band into parallel light and output to the wavelength division multiplexing filter 14;

Wavelength division multiplexing filter 14 is used to reflect 4 parallel light and then output to the first lens 130 again;

The first lens 130 further focuses the light reflected by the wavelength division multiplexing filter and outputs it to the second optical waveguide 121;

The second optical waveguide 121 includes a first end 121a and a second end 121b for receiving light that has been focused by the first lens 130 from the first end 121a, and outputted from the second end 121b to the optical fiber 150;

The optical fiber 150 includes a first end 150a and a second end 150b for receiving light from the second optical waveguide 121 from the first end 150a and outputting from the second end 150b.

In the embodiment of the present application, the light transmission process may be described as follows: the optical signal of the first wavelength band output from the light emitting device 110 is input from the first end 120a of the first optical waveguide 120, from the second end of the first optical waveguide 120. The output of 120b is then formed into parallel light by the first lens 130, and then incident on the wavelength division multiplexing filter 14, reflected by the wavelength division multiplexing filter 14, and then focused by the first lens 130 and then incident on the second optical waveguide. The first end 121a of the 121 is output from the second end 121b of the second optical waveguide 121 to the first end 150a of the optical fiber 150, and is output from the second end 150b of the optical fiber 150.

In the above manner, the optical signal of the first wavelength band output from the first optical waveguide 120 is passed through the first lens 130 and the wavelength division multiplexing filter 14 by the first lens 130 in the first lens array 13 which is added. After being reflected, the first lens 130 is effectively reflected into the second optical waveguide 121. Since the second end 120b of the first optical waveguide 120 and the first end 121a of the second optical waveguide 121 are parallel to each other, they are not The machining accuracy affects the first optical fiber signal output from the first optical waveguide 120 by the filter 14 and the first lens 130, thereby reducing the reflection loss.

As a preferred manner, the second end 120b of the first optical waveguide 120 and the first end 121a of the second optical waveguide 121 are parallel to each other and form a coupler structure with the first lens 130, and the second of the second optical waveguide 121. The end 121b and the first end 150a of the optical fiber 150 coincide with each other to form a coupler structure.

Further, the optical fiber 150 is used to receive the optical signal of the first wavelength band from the second end 150b of the optical fiber 150, and output the optical signal of the first wavelength band from the first end 150a of the optical fiber 150 to the second optical waveguide 121;

The second optical waveguide 121 is configured to receive the optical signal of the first wavelength band from the second end 121b of the second optical waveguide 121, and output to the first lens 130 from the first end 121a of the second optical waveguide;

The first lens 130 is used to form the optical signal of the first wavelength band into parallel light and then incident on the wavelength division multiplexing filter 14;

Wavelength division multiplexing filter 14 is used to reflect 4 parallel light and then output to the first lens 130;

The first lens 130 is used to focus the light reflected by the wavelength division multiplexing filter 14 and then emitted to the first optical waveguide 120;

The first optical waveguide 120 is further configured to receive the focused light from the second end 120b of the first optical waveguide 120, and output from the first end 120a of the first optical waveguide 120 to the light emitting device 11;

The light-emitting device 11 is for amplifying the light output from the first optical waveguide 120 and outputting it.

The optical transmission process may be specifically described as follows: the optical signal of the first wavelength band input from the second end 150b of the optical fiber 150 is input from the first end 150a of the optical fiber 150 to the second end 121b of the second optical waveguide 121, and from the second optical waveguide The first end 121a of the 121 is output, and then formed into parallel light via the first lens 130, and then incident on the wavelength division multiplexing filter 14, reflected by the wavelength division multiplexing filter 14, and then incident by the first lens 130. The second end 120b of the first optical waveguide 120 is output from the first end 120a of the first optical waveguide 120 to the light-emitting device 11 to be amplified by the light-emitting device 11 and then emitted. In this way, it is possible to output a stable optical signal of a certain wavelength in the first wavelength band to the downlink transmission.

In this embodiment, the first lens array 13 may be a first self-focusing lens array, and the first self-focusing lens array includes at least one first self-focusing lens. That is, the first lens 130 described above may be a first self-focusing lens.

The above optical device is mainly described by a light emitting process. In fact, in order to meet the needs of light receiving, the optical device in this embodiment further includes a light receiving end to implement optical signal receiving.

Through the foregoing description of the embodiments, it can be understood that the optical device provided by the present application is provided with a light emitting device array, a planar optical waveguide, a first lens array, a wavelength division multiplexing filter, and an optical fiber array, wherein the light emitting device array includes at least A light emitting device, the planar optical waveguide comprising at least one first optical waveguide and at least one second optical waveguide, the first lens array comprising at least one first lens, and the optical fiber array comprising at least one optical fiber. In this way, the optical signal of the first wavelength band outputted from the light emitting device is incident on the first lens array through the first optical waveguide, and then reflected by the wavelength division multiplexing filter and returned to the first lens array, and is focused. After passing through the second optical waveguide, it is transmitted through the optical fiber to the system link. Since the second end of the first optical waveguide and the first end of the second optical waveguide are parallel to each other, the optical device of the present application is not affected by the processing precision, and can only effectively pass the filter and the first lens. The first band optical signal output by an optical waveguide is reflected into the second optical waveguide to reduce reflection loss.

Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of another embodiment of an optical device according to the present application. The embodiment is a light emitting end and a light receiving end of the optical device. The optical device 20 of the present application includes a light-emitting device array 21, a planar optical waveguide 22, a first lens array 23, a wavelength division multiplexing filter 24, and an optical fiber array 25.

The light emitting device array 21 includes at least one light emitting device 210. The planar optical waveguide 22 includes at least one first optical waveguide 220 and at least one second optical waveguide 221. The first lens array 23 includes at least one first lens 230, and the optical fiber array 25 At least one optical fiber 250 is included.

The first lens array 23 is disposed outside the planar optical waveguide 22, and the wavelength division multiplexing filter 24 is disposed adjacent to the first lens array 23 and coupled to each other.

The first optical waveguide 220 and the second optical waveguide 221 are disposed along different paths. The first end 220a of the first optical waveguide 220 is disposed adjacent to the light emitting device 32 and coupled to each other. The second end of the first optical waveguide 220 220b is disposed adjacent to the first lens 230 and coupled to each other. The first end 221a of the second optical waveguide 221 is disposed adjacent to the first lens 230 and coupled to each other. The second end 221b of the second optical waveguide 221 and the optical fiber 250 The first ends 250a are disposed adjacent to each other and coupled to each other.

For the specific function implementation process of the above components, refer to the description of the embodiment shown in FIG. 1 , and details are not described herein again.

As a more preferred embodiment, the optical device 20 of the present application further includes a second lens array 26 and a light receiving device array 27, the second lens array 26 includes at least one second lens 260, and the light receiving device array 27 includes at least one light receiving Device 270;

The second lens array 26 is disposed adjacent to the wavelength division multiplexing filter 24 and coupled to each other, and the wavelength division multiplexer 24 is disposed between the first lens array 23 and the second lens array 26.

The optical fiber 250 is further configured to receive the optical signal of the second wavelength band from the second end 250b, and output the optical signal of the second wavelength band from the first end 250a to the second optical waveguide 221;

The second optical waveguide 221 is configured to receive an optical signal of the second wavelength band from the second end 221b of the second optical waveguide 221, and output the optical signal of the second optical band from the first end 221a of the second optical waveguide 221 to the first lens 230;

The first lens 230 is used to form the second band of optical signals into parallel light and then incident on the wavelength division multiplexing filter 24;

Wavelength division multiplexing filter 24 is used to transmit parallel light and output to the second lens 260;

The second lens 260 is for focusing the light transmitted by the wavelength division multiplexing filter 24 and outputting it to the light receiving device 270.

The transmission process of the optical signal of the second wavelength band in this embodiment may be specifically described as follows: the optical signal of the second waveguide received by the optical fiber 250 is input from the second end 250b of the optical fiber 250, and is input from the first end 250a of the optical fiber 250 to the first The second end 220b of the second optical waveguide 220 is output from the first end 221a of the second optical waveguide 221, and then formed into parallel light through the first lens 230, and then incident on the wavelength division multiplexing filter 24, which is wavelength division multiplexed. The filter 24 is transmitted and then focused by the second lens 260 and then incident on the light receiving device 270.

It is worth mentioning that the light emitting device in the embodiment of the present application is a reflective semiconductor optical amplifier (Reflective) Semiconductor Optical Amplifier, RSOA).

In this embodiment, the first lens array 23 and the second lens array 26 may each be a self-focusing lens array, and each of the self-focusing lens arrays includes at least one self-focusing lens.

Through the foregoing description of the embodiments, it can be understood that the optical device of the present application is provided with a light emitting device array, a planar optical waveguide, a first lens array, a wavelength division multiplexing filter, and an optical fiber array, wherein the light emitting device array includes at least one The light emitting device, the planar optical waveguide includes at least one first optical waveguide and at least one second optical waveguide, the first lens array includes at least one first lens, and the optical fiber array includes at least one optical fiber. In this way, the optical signal of the first wavelength band outputted from the light emitting device is incident on the first lens array through the first optical waveguide, and then reflected by the wavelength division multiplexing filter and returned to the first lens array, and is focused. After passing through the second optical waveguide, it is transmitted through the optical fiber to the system link. Since the second end of the first optical waveguide and the first end of the second optical waveguide are parallel to each other, the optical device of the present application is not affected by the processing precision, and can only effectively pass the filter and the first lens. The first band optical signal output by an optical waveguide is reflected into the second optical waveguide to reduce reflection loss.

In addition, the first lens array and the second lens array enable the wavelength division multiplexing filter to be coupled with the multiple optical waveguides, so that the wavelength division multiplexing filter is combined with the PLC to meet the requirements of multiple reception and multiple transmission. , saving WDM-PON system costs.

On the basis of the foregoing optical device implementation, the present application further provides an optical network system. Referring to FIG. 3, FIG. 3 is a schematic structural diagram of an embodiment of an optical network system according to the present application. The optical network system 30 of the present application includes at least one of the foregoing. The optical device 31 of the embodiment.

The optical device 31 includes a light emitting device array 310, a planar optical waveguide 311, a first lens array 312, a wavelength division multiplexing filter 313, a second lens array 315, and a light receiving device array 316 and an optical fiber array 314. . For the function and implementation process of each component, refer to the related description of the embodiment shown in FIG. 1 and FIG. 2, and details are not described herein again.

The optical network system 30 further includes an arrayed waveguide grating 32 (AWG) and a partial mirror 33 (Partial). Reflection Mirror, PRM), the arrayed waveguide grating 32 includes a branch end 32a and a common end 32b, the branch end 32a is connected to the second end of the optical fiber, and the partial mirror 33 is disposed at the common end, wherein the arrayed waveguide grating 32 is used for the optical fiber from the optical fiber. The optical signal of the first wavelength band is filtered and output to the partial mirror 33; the partial mirror 33 is used to transmit a part of the optical signal of the first wavelength band filtered by the arrayed waveguide grating 32 to the transmission link, and the array is Another portion of the optical signal of the first wavelength band filtered by the waveguide grating 32 is reflected back to the second end of the optical fiber. That is, after the optical signal of the first band outputted by the second end of the optical fiber is filtered by the arrayed waveguide grating 32, a part of the filtered optical signal of the first wavelength band is transmitted by the partial mirror 32 to the transmission link, and the other part is partially. The mirror 32 is reflected back to the second end of the fiber.

The optical network system of the embodiment of the present application can be used for a central office (OLT) or an optical network unit (ONU) of the WDM-PON.

In this embodiment, the working process of the optical device in the optical network system is as follows: taking an arrayed waveguide grating channel whose center wavelength is a λ ₁ optical signal (ie, the optical signal of the first wavelength band mentioned above) as an example, the light emitting device first The emitted wide-spectrum optical signal is transmitted to the optical fiber array 314 through the wavelength division multiplexing filter 313, and after being transmitted through a length of optical fiber, after being filtered by the arrayed waveguide grating 32, only the optical signal in the passband of the arrayed waveguide grating 32 can be The partial mirror 33 on the common end 32b of the arrayed waveguide grating 32 passes through the arrayed waveguide grating 32. After passing through the partial mirror 33, a part of the light is transmitted, and the other part of the light is reflected back again through the arrayed waveguide grating 32, and then reinjected into the light emission. In the device, the gain cavity of the light-emitting device re-amplifies the reflected light and then emits it again, so that the round-trip multiple times, if the gain of the light-emitting device is greater than the round-trip link loss, between the light-emitting device and the partial mirror 33 and form a cavity fiber laser output is stable and the emission wavelength of the downlink optical signal (L-band) λ _1; and the ONU Emitted wavelength (C-band) optical signal λ ₂ (i.e., the aforementioned second band optical signal), through the AWG and the optical fiber, and then through the WDM filter 313, since the WDM filter 313 The wavelength selection characteristics are routed to the light receiving device array 316 for reception.

In the above technical solution, when the existing wavelength division multiplexing filter is combined with the planar optical waveguide, there is a problem that the processing precision is insufficient to increase the optical path loss, and an optical device and an optical network system are provided, which can enable the output from the transmitting device. The optical signal of one wavelength is incident on the first lens array through the first optical waveguide, is reflected by the wavelength division multiplexing filter, and then returned to the first lens array, and after being focused, passes through the second optical waveguide and is transmitted through the optical fiber to the system chain. Go in the road. Since the second end of the first optical waveguide and the first end of the second optical waveguide are parallel to each other, the optical device of the present application is not affected by the processing precision, and can only effectively pass the filter and the first lens. The first band optical signal output by an optical waveguide is reflected into the second optical waveguide to reduce reflection loss.

In the several embodiments provided herein, it should be understood that the disclosed apparatus and structure may be divided in other ways. For example, the device implementations described above are merely illustrative. For example, the division of components is only a logical function division. In actual implementation, there may be another division manner. For example, multiple structures may be combined or integrated. Go to another component, or some features can be ignored. The structures described as separate components may or may not be physically separate.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

An optical device, characterized in that the optical device comprises an array of light emitting devices, a planar optical waveguide, a first lens array, a wavelength division multiplexing filter, an optical fiber array, wherein:

The light emitting device array includes at least one light emitting device, the planar optical waveguide including at least one first optical waveguide and at least one second optical waveguide, the first lens array including at least one first lens, the optical fiber array Including at least one optical fiber;

The light emitting device is configured to output an optical signal of a first wavelength band, and send the optical signal of the first wavelength band to the first optical waveguide;

The first optical waveguide includes a first end and a second end for receiving an optical signal from a first wavelength band of the light emitting device from a first end and an optical signal of the first wavelength band from a second end Output to the first lens;

The first lens is configured to convert the optical signal of the first wavelength band into parallel light and output the optical signal to the wavelength division multiplexing filter;

The wavelength division multiplexing filter is configured to reflect the parallel light and output it to the first lens again;

The first lens further focuses the light reflected by the wavelength division multiplexing filter and outputs the light to the second optical waveguide;

The second optical waveguide includes a first end and a second end for receiving the focused light from the first end and outputting from the second end to the optical fiber;

The optical fiber includes a first end and a second end for receiving light from the second optical waveguide from the first end and outputting from the second end.
The optical device according to claim 1, wherein said optical device further comprises a second lens array and said light receiving device array, said second lens array comprising at least one second lens, said light receiving device array comprising at least a light receiving device;

The optical fiber is further configured to receive an optical signal of the second wavelength band from the second end, and output the optical signal of the second wavelength band from the first end to the second optical waveguide;

The second optical waveguide is configured to receive an optical signal of the second wavelength band from the second end of the second optical waveguide, and use the optical signal of the second optical band from the first optical waveguide Outputting to the first lens;

The first lens is configured to form an optical signal of the second wavelength band into parallel light and then enter the wavelength division multiplexing filter;

The wavelength division multiplexing filter is configured to transmit the parallel light and output to the second lens;

The second lens is configured to focus the light transmitted by the wavelength division multiplexing filter and output the light to the light receiving device.
The optical device according to claim 1, wherein

The optical fiber, configured to receive an optical signal of the first wavelength band from the second end of the optical fiber, and output the optical signal of the first wavelength band from the first end of the optical fiber to the second optical waveguide ;

The second optical waveguide is configured to receive an optical signal of the first wavelength band from the second end of the second optical waveguide, and output the optical signal from the first end of the second optical waveguide to the first lens;

The first lens is configured to form an optical signal of the first wavelength band into parallel light and then enter the wavelength division multiplexing filter;

The wavelength division multiplexing filter is configured to reflect the parallel light and output the same to the first lens;

The first lens is configured to focus the light reflected by the wavelength division multiplexing filter and then emit the light to the first optical waveguide;

The first optical waveguide is further configured to receive the focused light from a second end of the first optical waveguide, and output the light from the first end of the first optical waveguide to the light emitting device;

The light emitting device is configured to amplify and output the light output by the first optical waveguide.
The optical device according to any one of claims 1 to 3, wherein the wavelength division multiplexing filter is disposed between the first lens array and the second lens array.
The optical device according to any one of claims 1 to 3, wherein the first planar optical waveguide and the second planar optical waveguide are disposed along different paths, and the first optical waveguide The two-terminal waveguide is parallel to the first end waveguide of the second optical waveguide.
The optical device according to any one of claims 1 to 3, wherein the first lens array is disposed outside the planar optical waveguide.
The optical device according to any one of claims 1 to 3, wherein the light-emitting device is a reflective semiconductor optical amplifier.
An optical network system, characterized in that the optical network system comprises at least one optical device according to any of claims 1-7.
The optical network system according to claim 8, wherein said optical network system further comprises an arrayed waveguide grating and a partial mirror, said arrayed waveguide grating comprising a branch end and a common end, said branch end and said optical fiber The second end is connected, and the partial mirror is disposed at the common end:

The arrayed waveguide grating is configured to filter an optical signal from a first wavelength band of the optical fiber and output the optical signal to the partial mirror;

The partial mirror is configured to transmit a portion of the optical signal of the first wavelength band filtered by the arrayed waveguide grating to a transmission link, and the optical signal of the first wavelength band filtered by the arrayed waveguide grating Another portion is reflected back to the second end of the fiber.