CN111830649A - Optical wiring unit and wiring method based on fiber grating - Google Patents

Abstract

The invention discloses an optical distribution unit and a distribution method based on fiber bragg gratings, and provides a method for replacing paper labels with fiber bragg gratings capable of transmitting different wavelengths. Each connection unit comprises a service unit and a detection unit. The service unit comprises a service optical fiber, a service unit connector and a service port. The detection unit comprises a detection optical fiber, a detection unit connector, a detection port and an indicator light. By directing the service unit connector to plug into the target service port, if the transmission wavelengths of the fiber grating in the detection unit connector and the optical filter in the detection port are the same, the identification light passing through the fiber grating can pass through the optical filter. After photoelectric conversion and processing of the main control module, an LED2 indicator light on the side of the target detection port is switched on, which indicates that the target service unit connector and the target service port are successfully matched. The unit may facilitate management and maintenance of the fiber optic line.

Description

Optical wiring unit and wiring method based on fiber grating

technical field

The invention relates to the field of optical communication, in particular to an optical wiring unit and a wiring method based on a fiber grating.

Background technique:

With fierce market competition and rapid technological development, users have higher and higher requirements for network bandwidth, stability and real-time performance, and the tide of FTTx has come. With the increasing demand for service opening, a large number of optical paths need to be wired in an optical fiber distribution system. However, how to accurately identify targets in a large number of optical fiber jumpers and pigtail ports has become a technical problem in the art.

For this kind of point-to-point line, if you continue to use manually identified paper labels for fiber optic wiring management, the defects are very obvious, the labels are easy to fall off, and the handwriting is easy to blur. You need to read the label information one by one to find the target end. Due to the above characteristics, the search efficiency is low and error-prone, etc., and the maintenance workload and management difficulty will be greatly increased.

To sum up, the existing optical distribution frame paper label identification has corresponding technical drawbacks, which affects the identification work efficiency. Therefore, to provide a solution that can replace paper labels and thus realize the identification of optical fibers has become a technical problem that needs to be solved urgently.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an optical wiring unit and wiring method based on fiber grating, which can avoid misjudgment caused by the automatic falling off of the original paper label, and can correctly guide the service optical fiber connector to be inserted into the designated service port.

An optical distribution unit based on fiber grating, comprising a main control module, a connection unit, an optical splitter and a signal source in series, the main control module is connected to a management system, and the connection unit includes a service unit and a detection unit, The main control module is respectively connected to each independent electronic device on the detection unit, the service unit includes a service optical fiber, a service unit connector and a service port, the service port is set on the service unit connector, and the service unit is connected to the service unit connector. The service optical fiber connects the service unit connector and the optical splitter, the detection unit includes a detection optical fiber, a detection unit connector, a detection port and an indicator light, and the detection port is arranged on the detection unit connector, The detection optical fiber is connected to the detection unit connector and the optical splitter, and the indicator light is arranged on the detection port.

The signal source includes service signal light and detection signal light, and the working wavelengths of the two signal lights are respectively in different working windows.

The service port and the detection port are bound to each other, and the two output ends of each optical splitter are respectively a paired service unit connector and a detection unit connector.

The detection unit connector is provided with a fiber grating that can transmit a specific wavelength, and the specific wavelength is within the wavelength window range of the detection optical signal.

The detection port includes: an optical filter that can transmit a specific wavelength, a photoelectric detection module and two LED indicator lights, where LED1 is used to guide the target service port that needs to be opened, and LED2 is used to detect whether the service unit connector is correctly inserted into the designated port. target service port.

The transmission wavelength of the optical filter is consistent with the transmission wavelength of the grating in the connector of the detection unit.

The devices that can be used for the optical filter include: fiber grating; dielectric thin film; F-P interferometer; Mach-Zehnder interferometer.

The management system switches on the indicator LED1 of the corresponding target service port through the main control module of the patch panel, lights the LED1 indicator, and the field staff inserts the service unit connector into the target service port according to the prompt of the LED1 indicator.

The advantage of the present invention is that: the optical distribution unit based on fiber grating uses fiber grating that can transmit different wavelengths instead of paper labels, and according to the indication of the LED1 indicator, the service unit connector is inserted into the target service port, and after the connection is completed According to the LED2 indicator to judge whether the matching is successful, it is convenient to check the matching situation, manage and maintain the optical fiber line in time.

Description of drawings

1 is a frame diagram of an optical wiring identification unit provided by the present invention;

2 is a schematic structural diagram of a detection unit connector involved in the present invention;

3 is a schematic structural diagram of a detection port involved in the present invention;

FIG. 4 is a schematic structural diagram of a photoelectric detection module according to the present invention.

Among them: 21-fiber grating, 31-optical filter, 32-photoelectric detection module, 321-photoelectric detector, 322-logic control circuit.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

As shown in Figure 1 to Figure 4, an optical wiring unit based on fiber grating, the unit includes a main control module (the main control module is connected with the management system), 12 connection units, 12 optical splitters, signal source , wherein: the connection bus between the main control unit and the detection unit is connected with all electronic devices that need to be connected with the main control module, and each connection unit includes a business unit and a detection unit. Among them, the business unit includes a business optical fiber, a business unit connector, and a business port. The detection unit includes detection fiber, detection unit connector, detection port, LED1, LED2 indicator lights.

The signal source includes service signal light and detection signal light, and the working wavelengths of the two signal lights are respectively in different working windows.

The service port and the detection port are bound to each other, and the two output ends of each optical splitter are respectively a paired service unit connector and a detection unit connector.

The detection unit connector is provided with a fiber grating that can transmit a specific wavelength, and the specific wavelength is within the wavelength window range of the detection optical signal.

The light that can pass through the fiber grating in the connector of the detection unit is called identification light.

The detection port includes: an optical filter that can transmit a specific wavelength, a photoelectric detection module and two LED indicator lights, where LED1 is used to guide the target service port that needs to be opened, and LED2 is used to detect whether the service unit connector is correctly inserted into the designated port. target service port.

The transmission wavelength of the optical filter is consistent with the transmission wavelength of the grating in the connector of the detection unit.

The devices that can be used for the optical filter include: fiber grating; dielectric thin film; F-P interferometer; Mach-Zehnder interferometer.

The management system switches on the indicator LED1 of the corresponding target service port through the main control module of the patch panel, lights the LED1 indicator, and the field staff inserts the service unit connector into the target service port according to the prompt of the LED1 indicator.

The photoelectric detection module includes a photodetector. If the transmission wavelengths of the optical fiber grating in the detection unit connector and the optical filter in the detection port are the same, the identification light passing through the optical fiber grating can pass through the optical filter. The photoelectric detection module converts the identification optical signal passing through the optical filter into an electrical signal, and transmits the electrical signal to the main control module. The connector and the target service port are correctly matched successfully. If the transmission wavelengths of the optical fiber grating in the detection unit connector and the optical filter in the detection port are different, the identification light passing through the optical fiber grating cannot pass through the optical filter. Therefore, the photodetector cannot detect the optical signal after the optical filter, the main control module does not work, and the LED2 indicator is off, indicating that the service unit connector is not inserted into the designated target service port.

The specific implementation method includes the following steps:

a. The management system turns on the indicator LED1 of the corresponding target service port through the main control module of the distribution panel, lights up the LED1 indicator, and the on-site staff inserts the business unit connector into the target service port according to the prompt of the LED1 indicator;

Turn on and light up LED1, and insert the service unit connector into the target service port according to the instructions of LED1;

b. The staff inserts the service unit connector and the detection unit connector with the corresponding fiber grating into the service port and the detection port with the optical filter, and the fiber grating 21 in the detection unit connector senses the Detect the transmission of light, transmit the marking light of a specific wavelength, and then transmit the marking light into the detection port as shown in Figure 3;

Insert the service unit connector and the detection unit connector into the target service port and detection port after matching;

c. The transmitted identification light enters the detection port. The detection port contains an optical filter 31 with the same characteristics as the fiber grating in the detection unit connector. When the light beam enters the optical filter 31, the identification light of a specific wavelength can successfully pass through the optical filter. 31, and can be detected by the photoelectric detection module 32;

When LED2 is lit, the matching is successful;

d. The photodetector 321 converts the optical signal into an electrical signal, and transmits it to the logic control circuit 322. The logic control circuit senses the electrical signal, and through processing, outputs an identification electrical signal to the main control module, and the main control module connects according to the level pulse. If the LED2 indicator is turned on, it indicates that the matching is successful. If the LED2 indicator is not turned on, it means that the photodetector does not detect the identification light, the matching fails, and the wrong service optical fiber connector is inserted.

To sum up, the embodiment of the present invention can effectively detect whether the fiber insertion is correct by using the uniqueness of the transmission wavelength of a specific fiber grating; the accuracy of the fiber insertion can be intuitively conveyed to the construction personnel through the form of indicator lights. It is understood that the present invention may be embodied in other embodiments without departing from its spirit or essential characteristics. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.

Claims (9)

1. an optical wiring unit based on fiber grating, is characterized in that, comprises the main control module, the connection unit, the optical splitter and the signal source which are connected in series in sequence, the main control module is connected to the management system, and the connection unit comprises A service unit and a detection unit, the service unit includes a service fiber, a service unit connector and a service port, the service port is set on the service unit connector, and the service fiber connects the service unit connector and the service unit Optical splitter, the detection unit includes a detection optical fiber, a detection unit connector, a detection port and an indicator light, the detection port is provided on the detection unit connector, and the detection optical fiber is connected to the detection unit connector and the indicator light. In the optical splitter, the indicator light is arranged on the detection port. 2 . The fiber grating-based optical wiring unit according to claim 1 , wherein the signal source comprises service signal light and detection signal light operating at different wavelengths. 3 . 3 . The optical wiring unit based on fiber grating according to claim 1 , wherein the connector of the detection unit is provided with a fiber grating that transmits a specific wavelength. 4 . 4 . The optical wiring unit based on fiber grating according to claim 1 , wherein the detection port comprises an optical filter that transmits a specific wavelength and a photoelectric detection module. 5 . 5. A fiber grating-based optical distribution unit according to claim 4, wherein the indicator light comprises an LED1 for directing a target service port that needs to open a service and an LED1 for detecting the connection of the service unit Whether the adapter is correctly plugged into LED2 of the specific target service port. 6. A fiber grating-based optical wiring unit according to claim 4, wherein the optical filter comprises one of a fiber grating, a dielectric film, an F-P interferometer and a Mach-Zehnder interferometer . 7 . The optical wiring unit based on fiber grating according to claim 5 , wherein the photoelectric detection module converts the identification optical signal passing through the optical filter into an electrical signal and transmits it to the host. 8 . The control module thus turns on LED2. 8. The wiring method of a fiber grating-based optical wiring unit according to claims 1-7: the method comprises the following steps: Turn on and light up LED1, and insert the service unit connector into the target service port according to the instructions of LED1; Insert the service unit connector and the detection unit connector into the target service port and detection port after matching; Matching is successful when LED2 is lit. 9. A fiber grating-based optical wiring method according to claim 8, wherein the method for lighting the LED1 is: The management system turns on the indicator LED1 of the corresponding target service port through the main control module of the distribution panel, and lights up the LED1.

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