CN108333689B - Multi-channel light receiving assembly integrated with adjustable narrow-band filter - Google Patents
Multi-channel light receiving assembly integrated with adjustable narrow-band filter Download PDFInfo
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- CN108333689B CN108333689B CN201810252289.4A CN201810252289A CN108333689B CN 108333689 B CN108333689 B CN 108333689B CN 201810252289 A CN201810252289 A CN 201810252289A CN 108333689 B CN108333689 B CN 108333689B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29389—Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
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Abstract
The invention relates to the field of optical fiber communication devices, in particular to a multi-channel light receiving assembly integrated with an adjustable narrow-band filter, which comprises a plurality of light paths, a front coupling lens, a light demultiplexer, a rear coupling lens module group and a photoelectric detection module group, and is characterized by further comprising a narrow-band filter module group and a narrow-band filter feedback module group; the optical signals enter through the front coupling lens and then enter the optical demultiplexer to be separated into n optical branches, and the tail end of each optical branch is respectively connected with the narrow-band filter, the rear coupling lens and the photoelectric detection module. The beneficial effects of the invention are as follows: the background noise filtering effect of the optical signals emitted by the optical demultiplexer is enhanced, and the signal-to-noise ratio of the optical signals with various wavelengths incident on the photoelectric detection module group is improved; and the filtering center wavelength of the narrow-band filter is adjusted to work at an optimal value by adding a narrow-band filter feedback module.
Description
Technical Field
The invention relates to the field of optical fiber communication devices, in particular to a multi-channel light receiving component integrated with an adjustable narrow-band filter.
Background
In a multi-channel high-speed optical fiber communication system, each channel has a different wavelength, and the control and actual channel selection of the channels by the optical receiving assembly requires optical wavelength selection, i.e., the use of an optical wave filter. The optical wave demultiplexer (ODEMUX) device in the existing multichannel optical receiving assembly has a certain filtering function, for example, the multichannel optical receiving assembly of patent CN201410068800.7, the multichannel wavelength parallel optical receiving assembly and optical module of patent CN 2015143014. X, and the optical transmitting assembly with beam adjuster, the optical receiving assembly and the optical module of patent CN201610093936.2 are described in three patents, the optical signal with mixed wavelength enters the optical wave demultiplexer, and the mixed wavelength signal is separated according to different wavelengths through the refraction and reflection process of the wave splitting module of the optical wave demultiplexer and the selection function of the four wavelength diaphragms.
The semiconductor optical amplifier is used as a pre-amplifier of the optical receiving end, and can optically amplify the signal light entering the optical receiving end to compensate the transmission loss of the signal light on a long-distance optical path. But the signal light is caused to generate wider spontaneous emission background noise (ASE background noise light) during the optical amplification of the semiconductor optical amplifier. To filter out this background noise, a filter with a certain bandwidth is usually placed behind the semiconductor optical amplifier, such as the application of a single-channel optical receiving end of the semiconductor optical amplifier: the optical amplification control apparatus of patent CN200880131443.7, the semiconductor optical amplifier control method, the optical transmission device, and the patent US006714345B2 SEMICONDUCTOR OPTICAL AMPLIFIER PROVIDING HIGH GAIN, HIGH POWER AND LOW NOISE FIGURE are described. The semiconductor optical amplifier also has the problem of large noise in the optical amplification process of the multi-channel optical receiving assembly, and with the continuous rising application of the semiconductor optical amplifier in the multi-channel optical receiving assembly, when the optical wave membrane of the optical wave demultiplexer cannot meet the requirement of filtering the spontaneous emission wide spectrum noise of optical amplification, the problem of further filtering the optical channels separated by the multi-channel optical receiving assembly is needed to be considered.
Disclosure of Invention
The invention aims to solve the technical problems that: the semiconductor optical amplifier has a problem of large noise in multi-channel amplification. A multi-channel optical receiving module with an integrated tunable narrow-band filter is proposed in which the tunable narrow-band filter with a feedback device is arranged in front of the photodetecting module.
In order to solve the technical problems, the invention adopts the following technical scheme: a multi-channel light receiving assembly integrating an adjustable narrow-band filter comprises a plurality of light paths, a front coupling lens, a light demultiplexer, a rear coupling lens module group, a photoelectric detection module group, a narrow-band filter module group and a narrow-band filter feedback module group; the optical signals enter through the input end of the front coupling lens and then enter the optical demultiplexer through an optical path, the output end of the optical demultiplexer is divided into n optical branches, the tail end of each optical branch is respectively connected with a corresponding narrow-band filter, a corresponding rear coupling lens and a corresponding photoelectric detection module, the n photoelectric detection modules form a photoelectric detection module group, the n rear coupling lenses form a rear coupling lens module group, the tail ends of the photoelectric detection modules are electrically connected with the narrow-band filter feedback modules, the narrow-band filter feedback modules are electrically connected with the corresponding narrow-band filters, and the n narrow-band filter feedback modules form a narrow-band filter feedback module group. The front coupling lens collimates and guides the mixed light beam incident from the light path to the optical demultiplexer, n optical branches are separated by the optical demultiplexer, each optical branch passes through the narrow-band filter, and background noise in the optical signal is filtered by the filtering action of the narrow-band filter, so that the signal-to-noise ratio is improved, and the error rate is reduced. The center wavelength of the narrow-band filter is enabled to work on an optimal value through the narrow-band filter feedback module, and spontaneous radiation wide spectrum noise carried by the signal light is filtered through the narrow bandwidth value of the narrow-band filter.
Preferably, the optical demultiplexer is one of a prism optical demultiplexer, a diffraction grating optical demultiplexer, a waveguide grating optical demultiplexer, and a dielectric thin film optical demultiplexer. The prism optical demultiplexer, the diffraction grating optical demultiplexer, the waveguide grating optical demultiplexer and the medium film optical demultiplexer can be miniaturized and are convenient to integrate into an optical receiving assembly.
Preferably, the narrow-band filter module group is composed of n tunable band-pass filters corresponding to the central wavelengths of the optical signals on the n optical branches respectively.
Preferably, the photoelectric detection module is composed of a photoelectric detector and a pre-electric signal amplifier, and is used for photoelectric conversion, electric signal amplification and the like.
Preferably, the narrow-band filter feedback module is configured to control a power signal of the narrow-band filter according to an electric signal output by the photoelectric detection module group, and includes an electric signal detector, a microprocessor and a memory, where the electric signal detector and the memory are both electrically connected with the microprocessor, the microprocessor is electrically connected with the power signal control module of the narrow-band filter, the electric signal detector is configured to obtain voltage values output by n photoelectric detection modules, and the microprocessor is configured to control the power signal of the narrow-band filter according to the voltage values. The electric signal detector detects the intensity change of the electric signal output by the photoelectric detection module, so that whether the wavelength of the optical signal shifts or not can be judged, and after the wavelength of the optical signal shifts, the filtering center wavelength of the narrow-band filter is adjusted by adjusting the power supply signal of the narrow-band filter, so that the power supply signal is matched with the wavelength of the optical signal again.
Preferably, the narrow-band filter module, the post-coupling lens module and the photoelectric detection module are connected by a free space optical path. Limited by the minimum radius of curvature of the optical fiber, the volume reduction of the device using the optical fiber path is limited, and the problem of volume limitation can be avoided by using the free space optical path.
Preferably, the narrow-band filter feedback module group works as follows: a) The n narrow-band filter feedback modules of the narrow-band filter feedback module group respectively detect the intensity values of the electric signals output by the photoelectric detection modules of the corresponding optical branches, respectively record the maximum electric signal intensity value of each photoelectric detection module, and simultaneously record the modulation value of each narrow-band filter, wherein the n narrow-band filters respectively work on the corresponding filter center wavelength; b) When the center wavelength of a certain optical branch signal drifts and deviates from the filtering center wavelength of a corresponding narrow-band filter, the intensity of an optical signal emitted by the narrow-band filter becomes low, finally, the intensity value of an electric signal output by the corresponding photoelectric detection module becomes small, the corresponding narrow-band filter feedback module monitors the change, the center wavelength of the corresponding narrow-band filter is adjusted, the narrow-band filter feedback module traverses all values in a set range of the modulation value of the corresponding narrow-band filter recorded in the step A, the intensity value of the electric signal output by the corresponding photoelectric detection module in the modulation range is recorded, finally, a new maximum electric signal intensity value and a corresponding modulation value are obtained through comparison, and the modulation value is loaded on the corresponding narrow-band filter, so that the filtering center wavelength of the corresponding narrow-band filter is changed to the wavelength matched with the optical signal of the optical branch.
The invention has the following substantial effects: 1. the background noise filtering effect of the optical signals emitted by the optical demultiplexer is enhanced, and the signal-to-noise ratio of the optical signals with various wavelengths incident on the photoelectric detection module group is improved; 2. and the filtering center wavelength of the narrow-band filter is adjusted to work at an optimal value by adding a narrow-band filter feedback module.
Drawings
Fig. 1 is a schematic structural diagram of a multi-channel optical receiving component of the integrated tunable narrow-band filter.
Fig. 2 is a schematic diagram of a process of filtering signal light by a narrow-band filter to obtain spontaneous emission broad-spectrum background noise, in which fig. 2 (a) is an input light spectrum, fig. 2 (b) is a third channel filtering band-pass curve of an optical demultiplexer, fig. 2 (c) is a third channel emission spectrum of the optical demultiplexer, fig. 2 (d) is a third channel tunable narrow-band filter band-pass, and fig. 2 (e) is a third channel narrow-band filter emission spectrum.
Fig. 3 is a schematic diagram of a filtering process of the narrowband filter before and after modulation by the narrowband filter feedback module on the third channel.
Wherein: 101. front coupling lens 102, optical demultiplexer 103, rear coupling lens module group 104, photoelectric detection module group 105, narrow-band filter module group 106, narrow-band filter feedback module group.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, the structure diagram of the multi-channel optical receiving assembly of the integrated adjustable narrowband filter includes a plurality of optical paths, a front coupling lens 101, an optical demultiplexer 102, a rear coupling lens module group 103, a photoelectric detection module group 104, a narrowband filter module group 105, and a narrowband filter feedback module group 106; the optical signal enters through the input end of the front coupling lens 101 and then enters the optical demultiplexer 102 through the optical path, the output end of the optical demultiplexer 102 is divided into n optical branches, the tail end of each optical branch is respectively connected with a corresponding narrow-band filter, a corresponding rear coupling lens and a corresponding photoelectric detection module, the n photoelectric detection modules form a photoelectric detection module group 104, the n rear coupling lenses form a rear coupling lens module group 103, the tail ends of the photoelectric detection modules are electrically connected with a narrow-band filter feedback module, the narrow-band filter feedback module is electrically connected with a corresponding narrow-band filter, and the n narrow-band filter feedback modules form a narrow-band filter feedback module group 106. The front coupling lens 101 collimates and guides the mixed light beam incident from the light path to the optical demultiplexer 102, n optical branches are separated by the optical demultiplexer 102, each optical branch passes through a narrow-band filter, and background noise in the optical signal is effectively filtered by the filtering action of the narrow-band filter, so that the signal-to-noise ratio is improved, and the error rate is reduced. The center wavelength of the narrow band filter module group 105 is enabled to work at an optimal value through the narrow band filter feedback module group 106, and spontaneous radiation broad spectrum noise carried by the signal light is filtered through the narrow bandwidth value of the narrow band filter module group 105.
The multi-channel optical receiving module of the present invention, the multi-channel represents any number of channels above 2 channels, such as 2 channels, 4 channels, 32 channels, etc., the corresponding optical demultiplexer 102 has a corresponding number of output ports, the post-coupling lens module group 103 has a corresponding number of coupling lenses, and the photo-detector module group 104 has a corresponding number of photo-detector modules. The present embodiment is described and illustrated taking a 4-channel light receiving element as an example. The light beam incident on the 4-channel light receiving element is a mixed light beam of four wavelength (λ1, λ2, λ3 and λ4) light signals; the post-coupling lens module group 103 includes four identical post-coupling lens modules 103a, 103b, 103c, and 103d; the set of photo-detection modules 104 includes four identical photo-detection modules 104a, 104b, 104c and 104d. The composite optical signal is input to the 4-channel optical receiving module, is first guided to the optical demultiplexer 102 by the pre-coupling lens 101, and the optical demultiplexer 102 separates four wavelength optical signals according to different wavelengths and outputs the separated four wavelength optical signals from four ports. The optical demultiplexer 102 may be a miniaturized integrated optical demultiplexer such as a prism, a diffraction grating, a waveguide grating, a dielectric film, or the like. The four wavelength optical signals respectively emitted from the four output ports of the optical demultiplexer 102 pass through narrow band filters 105a, 105b, 105c, and 105d, respectively, and are then guided to photodetection modules 104a, 104b, 104c, and 104d by post-coupling lens modules 103a, 103b, 103c, and 103d, respectively. The photodetection modules 104a, 104b, 104c, and 104d each perform detection of an incident optical signal, photoelectric conversion, electric signal amplification, and electric signal output. The photo detection modules 104a, 104b, 104c and 104d are common main circuit component modules of an optical receiver, specifically, a receiver front end formed by a photodiode and a preamplifier.
The specific operation of the narrow band filter module group 105 and the narrow band filter feedback modules 106a, 106b, 106c and 106d is as follows: a schematic diagram of the process of filtering out the signal light spontaneous emission wide-spectrum background noise by the narrow-band filters 105a, 105b, 105c and 105d through their narrow filter bandwidths is shown in fig. 2. Fig. 2 and 3 illustrate the operation of the narrowband filter and the narrowband filter feedback module on a certain channel, such as the channel on which the narrowband filter 105c is located (the third channel), and the operation of both on other channels is substantially the same.
Fig. 2 (a) shows the input spectrum of a mixed light beam of four optical signals entering the multi-channel optical receiving module, and it can be seen that after the overall optical amplification of the external semiconductor optical amplifier, broad spectrum ASE background noise light is generated on the input spectrum of the mixed light beam. The four-path optical signals are guided to the optical demultiplexer 102 through the pre-coupling lens 101, and enter the respective separated optical paths through the refraction, reflection, filtering and aliquoting wave action of the optical demultiplexer 102. Through the filtering action of the optical demultiplexer 102, each optical signal still carries ASE background noise light with a certain width, as shown in fig. 2 (b) and fig. 2 (c). Fig. 2 (b) is a filtered band-pass curve of the third channel of the optical demultiplexer 102, and fig. 2 (c) is an emission spectrum of the optical signal after being filtered by the optical demultiplexer 102, where ASE background noise light with a certain width is visible around the channel light.
To ensure the signal-to-noise ratio of the outgoing optical signals from the optical demultiplexer 102, the narrowband filters 105a, 105b, 105c, and 105d further filter the outgoing optical signals from the optical demultiplexer 102 using a narrower bandwidth to filter out ASE background noise light carried by each optical signal, as shown in fig. 2 (d) and fig. 2 (e). Where fig. 2 (d) is a filtered bandpass curve of the narrowband filter 105c, and fig. 2 (e) is an emission spectrum of the narrowband filter 105c, and there is substantially no ASE background noise light around the visible channel light. The filtered clean channel light exits from the narrow-band filter module group 105 and is guided to the four photoelectric detection modules 104a, 104b, 104c and 104d through the rear coupling lens module group 103, respectively, to perform the processes of detection, photoelectric conversion, electric signal amplification and electric signal output.
As shown in fig. 3, the filtering process of the narrowband filters before and after the modulation of the narrowband filter feedback module on the third channel is schematically shown, the narrowband filter feedback modules 106a, 106b, 106c and 106D respectively monitor the intensity values of the electric signals output by the photo detection modules 104a, 104b, 104c and 104D in real time, and record the maximum electric signal intensity values D max10、Dmax20、Dmax30 and D max40 of the four photo detection modules respectively, and the feedback modules 106a, 106b, 106c and 106D simultaneously record the modulation values T max10、Tmax20、Tmax30 and T max40 of the narrowband filters 105a, 105b, 105c and 105D respectively at this time, and the four modulation values respectively make the central wavelengths of the four narrowband filters be at a certain value, so that the central wavelengths of the four narrowband filters are λ T10、λT20、λT30 and λ T40 respectively.
When the device configuration of the multi-channel optical assembly or the environmental conditions change, so that the center wavelengths of the four optical signals drift and deviate from the filtering center wavelengths of the narrow-band filters 105a, 105b, 105c and 105d (as shown in fig. 3 (a 1) compared with fig. 3 (d 1)), the intensities of the optical signals emitted by the narrow-band filters 105a, 105b, 105c and 105d become lower (as shown in fig. 3 (e 1)), which eventually results in that the intensity values of the electrical signals output by the photo-detection modules 104a, 104b, 104c and 104d become smaller. The feedback modules 106a, 106b, 106c, and 106d monitor this change, and adjust the center wavelengths of the narrow band filters 105a, 105b, 105c, and 105d (as shown in fig. 3 (d 2)). The feedback modules 106a, 106b, 106c and 106D traverse all values within the set range of the modulation values T max10、Tmax20、Tmax30 and T max40, record the intensity values of the electrical signals output by the photoelectric detection modules 104a, 104b, 104c and 104D within the modulation range, finally compare to obtain new four maximum electrical signal intensity values D max11、Dmax21、Dmax31 and D max41 and corresponding modulation values T max11、Tmax21、Tmax31 and T max41, load the modulation values onto the narrow-band filters 105a, 105b, 105c and 105D respectively, so that the filtering center wavelengths of the four narrow-band filters become λ T11、λT21、λT31 and λ T41, and the adjusted four filtering center wavelengths are the same as the center wavelengths of the shifted four optical signals (as shown in fig. 3 (D2) relative to fig. 3 (a 2)), thereby ensuring that the intensity values of the optical signals emitted by the narrow-band filters 105a, 105b, 105c and 105D are the maximum (as shown in fig. 3 (e 2)).
It should be noted that the feedback modules 106a, 106b, 106c, and 106d adjust the narrow-band filters 105a, 105b, 105c, and 105d independently of each other.
The above-described embodiment is only a preferred embodiment of the present invention, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (8)
1. A multi-channel light receiving component integrated with an adjustable narrow-band filter comprises a plurality of light paths, a front coupling lens, an optical demultiplexer, a rear coupling lens module group and a photoelectric detection module group, and is characterized in that,
The device also comprises a narrow-band filter module group and a narrow-band filter feedback module group;
The optical signals enter through the input end of the front coupling lens and then enter the optical demultiplexer through an optical path, the output end of the optical demultiplexer is divided into n optical branches, the tail end of each optical branch is respectively connected with a corresponding narrow-band filter, a corresponding rear coupling lens and a corresponding photoelectric detection module, the n photoelectric detection modules form a photoelectric detection module group, the n rear coupling lenses form a rear coupling lens module group, the tail ends of the photoelectric detection modules are electrically connected with the narrow-band filter feedback modules, the narrow-band filter feedback modules are electrically connected with the corresponding narrow-band filters, and the n narrow-band filter feedback modules form a narrow-band filter feedback module group; the narrow-band filter feedback module is used for controlling the power supply signal of the narrow-band filter according to the voltage value output by the photoelectric detection module group, enabling the center wavelength of the narrow-band filter to work on an optimal value through the narrow-band filter feedback module, and filtering spontaneous emission wide-spectrum noise carried by the signal light through the narrow bandwidth value.
2. A multi-channel optical receiver assembly incorporating a tunable narrow band filter as set forth in claim 1, wherein,
The narrow-band filter feedback module comprises an electric signal detector, a microprocessor and a memory, wherein the electric signal detector and the memory are electrically connected with the microprocessor, the microprocessor is electrically connected with a power signal control module of the narrow-band filter, the electric signal detector is used for obtaining voltage values output by n photoelectric detection modules, and the microprocessor is used for controlling the power signal of the narrow-band filter according to the voltage values;
The electric signal detector detects the intensity change of the electric signal output by the photoelectric detection module, so that whether the wavelength of the optical signal shifts or not can be judged, and after the wavelength of the optical signal shifts, the filtering center wavelength of the narrow-band filter is adjusted by adjusting the power supply signal of the narrow-band filter, so that the power supply signal is matched with the wavelength of the optical signal again.
3. A multi-channel optical receiver assembly incorporating an adjustable narrow band filter according to claim 1 or 2, wherein the narrow band filter module group is composed of n adjustable band pass filters corresponding to the center wavelengths of the optical signals on the n optical branches, respectively.
4. A multi-channel optical receiving module integrated with an adjustable narrow band filter according to claim 1 or 2, wherein the photodetecting module is composed of a photodetector and a pre-electric signal amplifier for photoelectric conversion and electric signal amplification, respectively.
5. The multi-channel optical receiver assembly incorporating a tunable narrow band filter according to claim 1 or 2, wherein the optical demultiplexer is one of a prism optical demultiplexer, a diffraction grating optical demultiplexer, a waveguide grating optical demultiplexer, and a dielectric thin film optical demultiplexer.
6. A multi-channel optical receiving assembly incorporating a tunable narrow band filter according to claim 1 or 2, wherein the narrow band filter module, the post-coupling lens module and the photo detection module are connected by a free space optical path.
7. A multi-channel optical receiver assembly incorporating a tunable narrow band filter as set forth in claim 3, wherein,
The narrow-band filter module, the rear coupling lens module and the photoelectric detection module are connected through a free space optical path.
8. A multi-channel optical receiving module incorporating a tunable narrow band filter according to claim 1 or 2, wherein the set of narrow band filter feedback modules operates as follows:
A) The n narrow-band filter feedback modules of the narrow-band filter feedback module group respectively detect the intensity values of the electric signals output by the photoelectric detection modules of the corresponding optical branches, respectively record the maximum electric signal intensity value of each photoelectric detection module, and simultaneously record the modulation value of each narrow-band filter, wherein the n narrow-band filters respectively work on the corresponding filter center wavelength;
B) When the center wavelength of a certain optical branch signal drifts and deviates from the filtering center wavelength of a corresponding narrow-band filter, the intensity of an optical signal emitted by the narrow-band filter becomes low, finally, the intensity value of an electric signal output by the corresponding photoelectric detection module becomes small, the corresponding narrow-band filter feedback module monitors the change, the center wavelength of the corresponding narrow-band filter is adjusted, the narrow-band filter feedback module traverses all values in a set range of the modulation value of the corresponding narrow-band filter recorded in the step A, the intensity value of the electric signal output by the corresponding photoelectric detection module in the modulation range is recorded, finally, the new maximum electric signal intensity value and the corresponding modulation value are obtained through comparison, the modulation value is loaded on the corresponding narrow-band filter, and the filtering center wavelength of the corresponding narrow-band filter is changed to the wavelength matched with the optical signal of the optical branch;
When the device constitution of the multi-channel optical assembly or the environmental condition factors change, so that the center wavelength of the four paths of optical signals shifts and deviates from the filtering center wavelength of the narrow-band filters (105 a), (105 b), (105 c) and (105 d), the intensity of the optical signals emitted by the narrow-band filters (105 a), (105 b), (105 c) and (105 d) becomes lower, and finally the intensity value of the electric signals output by the photoelectric detection modules (104 a), (104 b), (104 c) and (104 d) becomes smaller; the feedback modules (106 a), (106 b), (106 c) and (106 d) monitor the changes and adjust the center wavelengths of the narrow band filters (105 a), (105 b), (105 c) and (105 d); the feedback modules (106 a), (106 b), (106 c) and (106D) traverse all values within the set range of the modulation values T max10、Tmax20、Tmax30 and T max40, record the intensity values of the electric signals output by the photoelectric detection modules (104 a), (104 b), (104 c) and (104D) within the modulation range, finally compare and obtain new four maximum electric signal intensity values D max11、Dmax21、Dmax31 and D max41 and corresponding modulation values T max11、Tmax21、Tmax31 and T max41, load the modulation values onto the narrow-band filters (105 a), (105 b), (105 c) and (105D) respectively, so that the filtering center wavelengths of the four narrow-band filters become lambda T11、λT21、λT31 and lambda T41, and the adjusted four filtering center wavelengths are the same as the center wavelengths of the four optical signals after the shifting, thereby ensuring that the intensity values of the optical signals output by the narrow-band filters (105 a), (105 b), (105 c) and (105D) are the maximum.
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| US11947038B2 (en) * | 2018-12-21 | 2024-04-02 | Continental Automotive Systems, Inc. | Wavelength adaptive narrow band optical filter for a LIDAR system |
| CN109981180B (en) * | 2019-03-15 | 2020-06-30 | 武汉电信器件有限公司 | Wavelength locking optical module, device and wavelength locking method |
| CN114244436B (en) * | 2021-12-17 | 2023-05-30 | 西安电子科技大学 | Self-adaptive matched filtering system and matching method for bandwidth-variable optical signals |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246627A (en) * | 1998-08-31 | 2000-03-08 | 朗迅科技公司 | Extendible and contractable optical demultiple device for broadband DWDM system |
| CN103411668A (en) * | 2013-07-30 | 2013-11-27 | 武汉电信器件有限公司 | Optical power meter based on LAN-WDM wave band |
| CN106802186A (en) * | 2017-02-24 | 2017-06-06 | 中国科学院上海技术物理研究所 | The intelligent narrow-band-filter system of optical filtering is followed based on acousto-optic modulation optical maser wavelength |
| CN208110096U (en) * | 2018-03-26 | 2018-11-16 | 杭州芯耘光电科技有限公司 | A kind of multi-channel optical receiving unit of integrated adjustable narrow band filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3058265B2 (en) * | 1997-09-04 | 2000-07-04 | 日本電気株式会社 | Optical multiplexer / demultiplexer used for WDM optical transmission system |
-
2018
- 2018-03-26 CN CN201810252289.4A patent/CN108333689B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246627A (en) * | 1998-08-31 | 2000-03-08 | 朗迅科技公司 | Extendible and contractable optical demultiple device for broadband DWDM system |
| CN103411668A (en) * | 2013-07-30 | 2013-11-27 | 武汉电信器件有限公司 | Optical power meter based on LAN-WDM wave band |
| CN106802186A (en) * | 2017-02-24 | 2017-06-06 | 中国科学院上海技术物理研究所 | The intelligent narrow-band-filter system of optical filtering is followed based on acousto-optic modulation optical maser wavelength |
| CN208110096U (en) * | 2018-03-26 | 2018-11-16 | 杭州芯耘光电科技有限公司 | A kind of multi-channel optical receiving unit of integrated adjustable narrow band filter |
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