Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical path structure of optical repeater

An optical repeater and optical path technology, applied in the field of optical communication, can solve problems such as interruption of optical fiber communication, large coupling loss and degradation of polarization beam combiners, and achieve the effect of improving reliability

Active Publication Date: 2019-02-12
ACCELINK ELECTRONICS TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although due to the self-compensation effect, the cascaded optical amplifier unit in the saturated state can compensate for the loss of part of the gain, but it will still cause the gain flatness of the entire link and the Optical Signal Noise Ratio (Optical Signal Noise Ratio, abbreviated as: OSNR) Deterioration, especially in the case of large span and high gain, the failure of 2 or 3 pump lasers may still cause some wavelengths or even most wavelengths to fail to maintain normal communication
In addition, there are two defects in this redundant protection method: (1) The pump optical power is output through the 2×2 coupler, forming a single point of failure. When the coupler fails, the power of the two optical fiber amplifiers The pump laser is interrupted at the same time, resulting in the interruption of the uplink and downlink optical fiber communication; (2) The PBC used for the two pump multiplexers is usually made by the polarization-maintaining fiber tapered process, which is difficult to realize technically. In addition, there is a polarization beam combiner coupling The problem of large loss and high failure rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical path structure of optical repeater
  • Optical path structure of optical repeater
  • Optical path structure of optical repeater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 of the present invention provides an optical path structure of an optical repeater, such as image 3 As shown, it includes an uplink optical path 11, a downlink optical path 12, and at least two groups of pump lasers (such as image 3 13 and 14 in the dotted line box), couplers corresponding to the number of pump laser groups (such as image 3 15 and 16), wherein, each of the uplink optical path 11 and the downlink optical path includes at least two branches, such as image 3 As shown, the branches of the uplink optical path 11 include the first branch, the second branch, ..., the nth branch; the branches of the downlink optical path 12 include the first branch, the second branch, ..., the nth branch, specifically:

[0043] The pumping light output by the first pump laser group 13 via the first output end of the first coupler 15 is coupled to the first branch of the uplink optical path 11 through the first multiplexer 17; the first pump laser group 13 Th...

Embodiment 2

[0061]The embodiment of the present invention provides a pump redundancy protection method based on the optical repeater described in Embodiment 1. The embodiment of the present invention divides the wavelength channel transmitted in the optical fiber into at least two branches to amplify the ,Such as image 3 As shown, it includes the first branch of the uplink optical path 11, the second branch of the uplink optical path 11, ..., the nth branch of the uplink optical path 11, and the first branch of the downlink optical path 12, the downlink optical path The second branch of 12, ..., the nth branch of the optical path 12 in the downlink direction. Among them, the number of specific branches can be set according to the reliability requirements and the harshness of the working environment (in the embodiment of the present invention, usually refers to the submarine optical cable). Usually, the reliability requirements are very high and / or the working environment If it is worse,...

Embodiment 3

[0065] The embodiment of the present invention is based on the optical path structure of the optical repeater described in Embodiment 1 and the pump redundancy protection method described in Embodiment 2, and provides an example in a specific application scenario, although in this embodiment In the example, the identified labels are different from those in Example 1. The difference in the labels here shows that the embodiment of the present invention is the performance of Example 1 in a specific example scene. On the other hand, the embodiment of the present invention The relationship between the upper and lower instances derived from the corresponding features in Embodiment 1 is also expressed through the correspondence between the names and the structural positions of the drawings. see Figure 4 , including an uplink optical path 301, a downlink optical path 302, a first pump laser 303, a second pump laser 304, a third pump laser 305, a fourth pump laser 306, and two 2×2 3dB...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of optical communications, and provides an optical path structure of an optical repeater. In the structure, the pump light output by a first pump laser group via the first output end of a first coupler is coupled to a first branch of an upstream optical path through a first combiner, and the pump light output via the second output end of the first coupler is coupled to a first branch of a downstream optical path through a second combiner; the pump light output by a second pump laser group via the first output end of the second coupler is coupled toa second branch of the upstream optical path through a third combiner, and the pump light output via the second output end of the second coupler is coupled to a second branch of the downstream opticalpath through a fourth combiner. The optical path structure improves the reliability of the optical repeater by dividing the wavelength channel transmitted in the optical fiber into at least two branches for respective amplification.

Description

【Technical field】 [0001] The invention relates to the technical field of optical communication, in particular to an optical path structure of an optical repeater. 【Background technique】 [0002] At present, 97% of the transoceanic communication services are transmitted by submarine optical cables. The failure of the submarine cable system can cause huge economic losses. In addition, the high cost of maintenance of the submarine optical cable system and the maintenance time may be as high as several weeks. Therefore, optical repeaters and The reliability of submarine optical cables puts forward extremely high requirements. Compared with the submarine optical cable, the internal structure of the optical repeater is complex, and there are many optical and electrical components. Its reliability is particularly important. In the repeater, the pump laser is the device with the highest failure rate. In order to improve the reliability, the method of pump redundancy protection is u...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/291H04B10/294H04B10/297H04B10/032
CPCH04B10/032H04B10/2912H04B10/294H04B10/2971H04B10/298
Inventor 陈俊余春平李春雨
Owner ACCELINK ELECTRONICS TECH