KR200453204Y1 - Monitoring apparatus for optical communication connector mounted on optical line - Google Patents

Abstract

The present invention relates to an optical communication connector monitoring apparatus on an optical path, comprising: an optical instrument (OTDR) for outputting an optical signal for monitoring; An optical switch (OS) for converting an optical signal for monitoring of the photometer (OTDR) into an optical path to be monitored; A wavelength division multiplexing (WDM) coupler for injecting a monitoring optical signal into a monitoring target optical line; An optical splitter (SP) for distributing a monitoring optical signal incident on the monitoring target optical line; An optical communication connector monitoring apparatus on an optical path including an incoming optical cable for applying a distributed monitoring optical signal to an optical network terminal (ONT), the Bragg grating reflecting a monitoring optical signal having a specific wavelength output from an optical instrument (OTDR). An optical communication connector having a ferrule having an installed optical fiber; A photodetector for receiving the monitoring optical signal reflected by the Bragg grating; And a monitor configured to display the intensity of the light output of the monitoring optical signal converted by the photodetector in the form of a pulse.

Fiber Optic Connectors, Ferrules, Bragg Gratings, Fiber Optics, Photodetectors, Monitors

Description

Monitoring apparatus for optical communication connector mounted on optical line}

The present invention relates to an optical communication connector monitoring apparatus on a light path for monitoring the assembly failure of the optical communication connector in real time.

In general, optical communication uses optical fibers having a diameter of μm as a transmission medium to exchange information by transmitting light through optical fibers. Since optical cables are used for optical communication, lines are installed over a distance of tens of thousands to thousands of kilometers. Since it is impossible to form such a long-distance optical cable integrally, it is necessary to connect the optical cable at a certain part.For the optical fiber connection, a fusion splicing method for melting and connecting the optical fiber for permanent connection and an optical communication connector for detachable optical fiber are used. A mechanical connection method is used, and an optical communication connector is used as the mechanical connection method.

The optical communication connector fixes the optical fiber by using ferrules and then connects the optical fibers. The ferrule is a circular tube shape having an accommodating hole for fixing the optical fiber embedded therein. Different optical fibers on both sides are mechanically opposed to each other so that their central axes coincide with each other so that optical communication is arranged in a straight line so as to be optically connected to each other. In this connection, the ferrule embedded in the optical communication connector protects the foldable optical fiber, assists in axial alignment of the optical fiber, and serves to prevent optical loss caused by axial misalignment or gap of the optical fiber.

These optical communication connectors can be easily separated and connected to each other and can be repeatedly connected to each other. Therefore, optical fiber connectors are currently used in optical fiber distribution boards or optical end station devices and optical cables or optical cables, or input / output terminals such as optical measuring devices. In recent years, due to the expansion of FTTH (Fiber To The Home) service, a part of the optical communication connector has been pre-processed and assembled so that it can respond quickly and easily at the line site when connecting multiple optical lines. If provided, field-assembled optical communication connectors are used to connect optical communication connectors by simply stripping and cutting optical fibers and optical cables.

In the FTTH service, an optical line terminal (OLT) is installed in a telephone station, a wavelength division multiplexing (WDM) coupler is installed in an underground manhole near the residential area, and in a wavelength division multiplexing (WDM) coupler. Branched optical cables are fused into a nearby electric pole and connected to the optical splitter housed in the optical terminal box by fusion splicing, and the optical splitter and the subscriber optical network terminal (ONT) are connected by an incoming optical cable. The field assembly type optical communication connector is installed, which is directly assembled by the operator.

In order to open the FTTH service, the incoming optical cable is installed to the optical network terminal (ONT), and then the intensity of the optical output is measured. In order to find out whether optical loss is caused by the improper assembly of the connector, the installed optical communication connector is cut out and reassembled by another optical connector to solve the problem by measuring the optical output. There is an economic loss as it is disposed of.

Therefore, as a technology for solving this problem, Korean Patent Publication No. 10-2008-0108720 (measurement device for the presence and absence of defects of the field-assembled optical connector and its measuring method, hereinafter referred to as a patent) is known.

However, this patent discloses a leak light detector comprising an optical adapter, an optical fiber bending guide, a light receiving element, an amplifier, and an A / D converter, a memory, a setting switch, a controller, and an LED to solve the conventional problems. The introduction of a new technology configuration of the display unit, there is a problem that the cost, such as new production of equipment.

The present invention for improving the above-mentioned problem is to monitor the assembly failure of the optical communication connector installed in the optical splitter (SP) and the optical network terminal (ONT) in real time to maintain a constant communication quality optical communication on the optical fiber Its purpose is to provide a connector monitoring device.

The object of the present invention described above is an optical instrument (OTDR) 20 for outputting a monitoring optical signal; An optical switch (OS) 40 for converting the optical signal for monitoring of the photometer OTDR into the optical path to be monitored; A wavelength division multiplexing (WDM) coupler 50 for injecting a monitoring optical signal into the monitoring target optical line; An optical splitter (SP) 60 for distributing an optical signal for monitoring incident on the optical line to be monitored; An optical communication connector monitoring apparatus on an optical path including an incoming optical cable (80) for applying a distributed monitoring optical signal to an optical network terminal (ONT), the monitoring optical signal having a different wavelength output from an optical instrument (OTDR). An optical communication connector 70 having a ferrule 71 having an optical fiber 72 provided with a plurality of Bragg gratings 73 for reflecting; A photodetector 30 for receiving the monitoring optical signal reflected by the Bragg grating; And a monitor 10 for displaying the intensity of the optical output of the monitoring optical signal converted by the photodetector in the form of a pulse. The optical communication connector 70 includes an optical splitter (SP) and one side of the incoming optical cable. Each optical fiber terminal (ONT) installed on the other side, the optical communication connector installed in the optical splitter and the optical communication connector provided in the optical network terminal, respectively, the optical path characterized in that it has a Bragg grating reflecting the optical signal for monitoring of different wavelengths Is achieved by the optical communication connector monitoring device.

The optical communication connector installed in the optical splitter of the present invention is characterized by reflecting the optical signal for monitoring shorter wavelength than the optical communication connector installed in the optical network terminal.

In the optical communication connector monitoring apparatus on the optical path of the present invention, the specific wavelength of the monitoring optical signal is characterized in that 1600nm or 1650nm.

In the optical communication connector monitoring apparatus on the optical path of the present invention, the optical communication connector is characterized in that the SC type, FC type, LC type or MU type.

The optical communication connector having a ferrule having an optical fiber provided with the Bragg grating of the present invention described above, an optical detector for receiving the monitoring optical signal reflected by the Bragg grating, and an optical output of the monitoring optical signal transmitted from the photodetector. The built-in monitor that displays the intensity in the form of pulse makes it easy to monitor the assembly failure of the optical communication connector installed in the optical splitter SP and the optical communication connector installed in the optical network terminal (ONT) as well as the assembly of the optical communication connector. It is possible to minimize the technical configuration cost of the optical communication connector monitoring device on the optical path by the improved optical communication connector, the photodetector, and the monitoring device for monitoring the defect.

Hereinafter, the technical configuration of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an optical communication connector monitoring apparatus on an optical path of the present invention, Figure 2 is a perspective view of the optical communication connector for monitoring the communication quality of the present invention, Figure 3 is a cross-sectional view of the ferrule of FIG.

The optical communication connector monitoring device on the optical path of the present invention includes a monitor 10, an optical measuring device (OTDR) 20; A photodetector 30; An optical switch (OS) 40; A wavelength division multiplexing (WDM) coupler 50; A splitter (SP) 60; And an incoming optical cable 80.

The photometer (OTDR) 20 is controlled by the monitor 10 to output a monitoring optical signal, and the optical switch (OS) 40 is controlled by the monitor to monitor the optical signal of the photometer 20 To the monitored optical line, the wavelength division multiplexing (WDM) coupler 50 enters the monitored optical signal into the monitored optical line, and the optical splitter (SP) 60 enters the monitored optical line The optical fiber signal 80 is distributed between the optical splitter (SP) 60 and the optical network terminal (ONT) 90, which is an indoor unit, and is distributed by the optical splitter (SP) 60. The monitoring optical signal is applied to an optical network terminal (ONT) 90.

The optical signal for communication is output from the optical line terminal (OLT) 100 through the wavelength division multiplexing (WDM) coupler 50, and distributed through the optical splitter (SP) 60 to transmit the optical network terminal (ONT) 90 Is sent until.

The optical communication connector 70, the optical detector 30, and the monitor 10 are provided as a component for monitoring the assembly failure of the optical communication connector in the optical communication connector monitoring apparatus on the optical path as described above.

The optical communication connector 70 for monitoring the quality of communication is installed in the optical splitter (SP) 60 which is one side of the incoming optical cable 80 and the optical network terminal (ONT) 90 which is the other side of the incoming optical cable 80. The optical fiber 72 provided with the several Bragg grating 73 is provided in the ferrule 71 of the optical communication connector 70 provided in this way. The Bragg grating 73 of the optical fiber 72 reflects a monitoring optical signal of a specific wavelength output from the photometer (OTDR) 40. The optical signal for monitoring of this specific wavelength can use 1600 nm wavelength or 1650 nm wavelength as a wavelength of 1600 nm or more oscillated by the optical measuring device (OTDR) 40, for example.

That is, the Bragg grating 73 of the optical communication connector 70 installed in the optical splitter (SP) 60, which is one side of the incoming optical cable 80, is configured to reflect the 1600 nm wavelength, and is the other side of the incoming optical cable 80. The Bragg grating 73 of the optical communication connector 70 provided in the optical network terminal (ONT) 90 is configured to reflect the 1650 nm wavelength. Accordingly, it is possible to determine which optical communication connector is caused by an assembly failure between the optical communication connector 70 installed in the optical splitter (SP) 60 and the optical communication connector 70 installed in the optical network terminal (ONT) 90. Able to know.

As such, the Bragg grating 73 of the optical fiber 72 reflects a specific wavelength of the monitoring optical signal at regular intervals, and serves as a filter for passing other wavelengths, for example, the wavelength of the communication optical signal.

The optical communication connector 70 has various types such as SC type, FC type, LC type, and MU type, but the ferrules 71 used in the optical communication connector have the same size as the SC type and the FC type, and the LC type and the MU type It is smaller than SC type and FC type. Ferrules vary in size depending on the type of optical communication connector, but the Bragg grating 73 of the optical fiber can be inserted into the ferrule 71 regardless of the size of the ferrule.

FIG. 2 illustrates an SC type optical communication connector, and the optical communication connector 70 includes a housing 74 which entirely surrounds the ferrule 71 and a boot 75 that surrounds an end portion of the ferrule 71.

The photodetector 30 receives the monitoring optical signal reflected by the Bragg grating 73 and converts it into an electrical signal. The monitor 10 is a computer as a light beam monitoring software and various input / output devices (keyboard, mouse, Monitor), and displays the intensity of the light output of the monitoring optical signal converted into the electrical signal in the photodetector 30 through the monitor 11 in the form of a pulse.

Referring to the effect by the technical configuration of the present invention described above are as follows.

Multiple communication optical signals of the optical line terminal (OLT) 100 and the optical signals for monitoring of the optical instrument (OTDR) 20 are transmitted through the optical switch (OS) 40 and the wavelength division multiplexing (WDM) coupler 50. It is transmitted to the optical line and applied to the plurality of optical network terminals (ONT) 90 from the optical splitter (SP) 60 through the incoming optical cable 80, the optical instrument (OTDR) by the control signal of the monitor 10 The optical signal for monitoring the 1600 nm wavelength or the 1650 nm wavelength oscillated at 20 is converted into the monitored optical line through the optical switch (OS) 40 by the control signal of the monitor 10, and the wavelength division multiplexing ( WDM) is incident on the optical path to be monitored through the coupler 50 and distributed by the optical splitter (SP) 60 to the incoming optical cable 80 to be monitored.

The monitoring optical signal distributed in this way is reflected by the Bragg grating 73 of the plurality of optical communication connectors 70 installed on the optical splitter (SP) 60, which is one side of the incoming optical cable 80, or of the incoming optical cable 80. Reflected by the Bragg grating 73 of the plurality of optical communication connectors 70 installed on the other side of the optical network terminal (ONT) 90.

That is, the optical signal for monitoring having a wavelength of 1600 nm oscillated by the optical measuring device (OTDR) 20 is reflected by the Bragg grating 73 of the optical communication connector 70 installed in the optical splitter (SP) 60 and thus the optical communication. The assembly failure of the connector 70 can be known through the intensity of the reflected light output, and the optical signal for monitoring having a wavelength of 1650 nm is the Bragg grating of the optical communication connector 70 installed in the optical network terminal (ONT) 90. 73, the assembling failure of the optical communication connector 70 can be seen through the intensity of the reflected light output. The 1600 nm wavelength and 1650 nm wavelength monitoring optical signal returned by the reflected optical switch (OS) The light is sequentially transmitted to the photodetector 30 through the 40, and the photodetector 30 converts the electrical signal into an electrical signal to display the intensity of the light output in the form of a pulse on the monitor 11 of the monitor 10.

When the intensity of the light output is normal, the pulses are displayed at a constant frequency and amplitude. However, when the intensity of the light output is low, the monitor 11 displays a pulse having a non-uniform frequency and amplitude on the monitor 11 so that the monitor can divide the optical splitter SP. 60 and the optical network terminal (ONT) 90 of the indoor device can easily identify the problem with the optical communication connector 70 of the incoming optical cable 80, so that it can quickly cope with it, thereby maintaining high communication quality at all times. have.

If a plurality of wavelengths of another monitoring optical signal other than the 1600 nm wavelength or the 1650 nm wavelength of the monitoring optical signal used in the present invention are used, the above-described optical splitter (SP) 60 is provided on the incoming optical cable. In addition to the optical communication connector installed in the optical communication connector and the optical network terminal (ONT) 90, the incoming optical cable, it is possible to monitor the assembly failure of all optical communication connectors installed on the optical line, such as optical fiber distribution panel, optical end station device.

As described above, the present invention provides an optical communication connector having a ferrule with an optical fiber having a Bragg grating, an optical detector for receiving the monitoring optical signal reflected by the Bragg grating, and a monitoring optical signal transmitted from the photodetector. The optical communication connector of the present invention, which can easily monitor the assembly failure of the optical communication connector, can easily monitor the assembly failure of the optical communication connector by providing a monitor having a built-in program that displays the intensity of the optical output in the form of a pulse. Since all the monitors need to be improved in the prior art, it is possible to minimize the cost of having the technical configuration of the present invention.

1 is a block diagram of an optical subscriber network optical path monitoring device of the present invention.

2 is a perspective view of an optical communication connector for monitoring the communication quality of the present invention.

3 is a cross-sectional view of the ferrule of FIG.

DESCRIPTION OF REFERENCE NUMERALS

10: monitor 11: monitor

20: photometer 30: photo detector

40: optical switch 50: wavelength division multiplexing coupler

60: optical splitter 70: optical connector

71: ferrule 72: optical fiber

73: Bragg grating 80: incoming optical cable

90: optical network terminal

Claims (4)

An optical instrument (OTDR) 20 for outputting an optical signal for monitoring; An optical switch (OS) 40 for converting the optical signal for monitoring of the photometer OTDR into the optical path to be monitored; A wavelength division multiplexing (WDM) coupler 50 for injecting a monitoring optical signal into the monitoring target optical line; An optical splitter (SP) 60 for distributing an optical signal for monitoring incident on the optical line to be monitored; An optical communication connector monitoring apparatus on an optical path including an incoming optical cable (80) for applying a distributed monitoring optical signal to an optical network terminal (ONT), An optical communication connector (70) having a ferrule (71) having an optical fiber (72) provided with a plurality of Bragg gratings (73) for reflecting monitoring optical signals of different wavelengths output from an optical instrument (OTDR); A photodetector 30 for receiving the monitoring optical signal reflected by the Bragg grating; And a monitor 10 for displaying the intensity of the light output of the monitoring optical signal converted by the photo detector in the form of a pulse. The optical communication connector 70 is installed in the optical splitter SP, which is one side of the incoming optical cable, and the optical network terminal ONT, which is the other side of the incoming optical cable, respectively, and the optical communication connector installed in the optical splitter and the optical communication connector installed in the optical network terminal are each other. And a Bragg grating for reflecting an optical signal for monitoring at different wavelengths. The method according to claim 1, And an optical communication connector installed in the optical splitter reflects an optical signal for monitoring shorter wavelength than the optical communication connector installed in the optical network terminal. The method according to claim 1 or 2, The optical communication connector monitoring device on the optical path, characterized in that the specific wavelength of the optical signal for monitoring is 1600nm or 1650nm. The method according to claim 1 or 2, Optical communication connector monitoring device on the optical line, characterized in that the SC type, FC type, LC type or MU type.

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