# US 11,909,168 B2 · Self-adaptive wave band amplification method and amplifier

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,909,168 B2
- Document ID: US11909168B2
- Status: Granted
- Kind: B2
- Application number: 16/624,557
- Filed: 2017-12-25
- Published: 2021-01-21
- Granted: 2024-02-20
- Earliest claimed: 2017-06-22
- Assignees: Accelink Technologies Co., Ltd.
- Applicants: Accelink Technologies Co., Ltd.
- Inventors: Zhenyu Yu; Qinlian Bu; Chengpeng Fu; Xiao Cai; Fuxing Deng; Rui Lei
- Web page: https://patentgrep.com/patent/US11909168B2

## CPC

- H01S 3/13013: {by controlling the optical pumping}
- H01S 3/30: using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S 3/08013: {Resonator comprising a fibre, e.g. for modifying dispersion or repetition rate (the active medium being a fibre H01S3/067)}
- H01S 3/10015: {by monitoring or controlling, e.g. attenuating, the input signal}
- H04B 10/25: Arrangements specific to fibre transmission
- H04B 10/2916: {using Raman or Brillouin amplifiers}
- H04B 10/2942: {using automatic gain control [AGC] (H04B10/296 takes precedence)}
- H01S 3/06766: {C-band amplifiers, i.e. amplification in the range of about 1530 nm to 1560 nm}
- H01S 3/0677: {L-band amplifiers, i.e. amplification in the range of about 1560 nm to 1610 nm}
- H01S 3/094003: {the pumped medium being a fibre}
- H01S 3/094096: {Multi-wavelength pumping}
- H01S 3/302: {in an optical fibre}
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H04B: TRANSMISSION

## Abstract

The present invention relates to the technical field of optical communications, and relates to an optical amplification method and an amplifier, and in particular, to a self-adaptive wave band amplification method and an amplifier. The present invention consists of a master amplifying unit and a slave amplifying unit, and can autonomously detect the service signal wave band range of an optical transmission line, and according to the detection result, the two amplifying units do not need to perform scheduling or configuration from the level of network management, and perform direct interaction and action from the bottom layer to implement self-adaptive on, off and adjustment in real time. On one hand, power consumption is reduced, and energy is saved; and on the other hand, the performance is optimized, and an optimal optical amplification index is obtained.

## Claims

### Claim 1

A self-adaptive wave band amplification method, characterized in comprising:
a light splitting step for detecting C band detection light and L band detection light in an in-band signal; and
a scheduling step for enabling a slave Raman amplifying unit to participate in amplification after the L band detection light is detected,
wherein the method further comprises a wave combining step for performing a wave combination/splitting by using two optical wavelength division multiplexers after the slave Raman unit injects its pumping light into a master Raman unit, the wave combination comprising:
injecting pump light from the master Raman amplifying unit into a transmission fiber after wave combining/splitting once, and injecting pump light from the slave Raman unit into the transmission fiber after wave combining/splitting twice; or
injecting the pump light from the slave Raman unit into the transmission fiber after wave combining/splitting once, and injecting the pump light from the master Raman unit into the transmission fiber after wave combining/splitting twice; or
performing a first wave combination for the pump light from the master and slave Raman units and then a second wave combination/split with signal light.

### Claim 2 (depends on 1)

The self-adaptive wave band amplification method of claim 1, characterized in that the scheduling step enables a master Raman amplifying unit after the C band detection light and/or the L band detection light is detected.

### Claim 3 (depends on 1)

The self-adaptive wave band amplification method of claim 1, characterized in that a work flow of a Raman amplifying unit includes following steps:
step a, determining whether a pump-starting condition is met, and executing step b if yes;
step b, turning on a Raman unit pump with a preset small optical power value; returning to step 4,1-a when it is determined that the pump-starting condition is not met or executing step c when it is determined that a reflection coefficient does not exceed a threshold;
step c, configuring pump power according to a comparison between light power of each band in signal light and a corresponding threshold, and returning to step a when it is determined that the pump-starting condition is not met, and executing step b when it is determined that the reflection coefficient exceeds the threshold.

### Claim 4 (depends on 3)

The self-adaptive wave band amplification method of claim 3, characterized in that in the step c,
selecting different working modes for the master Raman unit pump according to the comparison; and
increasing pump optical power of the slave Raman unit to a target value according to the comparison.

### Claim 5

A self-adaptive band amplifier, characterized in comprising:
a light splitting module for detecting C band detection light and L band detection light in an in-band signal; and
a scheduling module for enabling a slave Raman amplifying unit to participate in amplification after the L band detection light is detected,
wherein the light splitting module comprises: a first signal light splitter for splitting the in-band signal, and a first optical wavelength division multiplexer connected with the first signal light splitter, output ends of the first signal light splitter being respectively connected with a first photodetector and a second signal light splitter for a master Raman amplifying unit, and the second signal light splitter being connected with a first photodetector for the slave Raman amplifying unit.

### Claim 6 (depends on 5)

The self-adaptive band amplifier of claim 5, characterized in that pump light emitted from a slave Raman amplifying unit pump is injected into a master Raman amplifying unit, passes through a first pump light splitter and is combined with in-band signal light at a second optical wavelength division multiplexer, and then is combined at a first optical wavelength division multiplexer with pump light emitted from a master Raman amplifying unit pump split by a second pump light splitter.

### Claim 7 (depends on 5)

The self-adaptive band amplifier of claim 5, characterized in that pump light emitted from a master Raman amplifying unit pump passes through a second pump light splitter and is combined with an in-band signal light at a first optical wavelength division multiplexer, and then is combined at a second optical wavelength division multiplexer with pump light from a slave Raman amplifying unit processed by a first pump light splitter.

### Claim 8 (depends on 5)

The self-adaptive band amplifier of claim 5, characterized in that pump light emitted from a master Raman amplifying unit pump and pump light emitted from a slave Raman amplifying unit pump are split respectively by a first pump light splitter and a second pump light splitter and combined at an optical wavelength division multiplexer, and then combined with an in-band signal light by another optical wavelength division multiplexer.