Optical amplifier, optical signal processing method, and storage medium

Patent metadata

Field	Value
Publication number	US-12413038-B2
Application number	US-202217827224-A
Country	US
Kind code	B2
Filing date	May 27, 2022
Priority date	Nov 29, 2019
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

An optical amplifier includes at least two stages of optical amplifier systems, an optical switch, a dynamic gain equalizer (DGE), and a control circuit. An input end of the optical switch is separately coupled to an output end of a first-stage optical amplifier system and an output end of a second-stage optical amplifier system, and an output end of the optical switch is separately coupled to an input end of the second-stage optical amplifier system and an input end of the DGE. The optical switch is configured to set at least two gain modes of the optical amplifier. The control circuit is configured to adjust an attenuation spectrum of the DGE based on the at least two gain modes set by the optical switch. The DGE is configured to perform, based on an adjusted attenuation spectrum, power attenuation processing on signals of different wavelengths in a received optical signal.

First claim

What is claimed is:

1. An optical amplifier comprising:
a dynamic gain equalizer (DGE) comprising a first input end;
at least two stages of optical amplifier systems comprising:
a first-stage optical amplifier system comprising a first output end and configured to amplify an input optical signal of the optical amplifier; and
a second-stage optical amplifier system comprising a second output end, comprising a second input end, and configured to amplify a first optical signal;

an optical switch, comprising a third input end coupled to the first output end and the second output end, comprising a third output end coupled to the second input end and the first input end, and configured to:
set at least two gain modes of the optical amplifier, wherein amplification multiples of the optical amplifier are different when the optical amplifier is in different gain modes;
output the first optical signal; and

output a second optical signal; and
a control circuit coupled to the optical switch and the DGE and configured to:
control the optical switch to set the at least two gain modes; and
adjust an attenuation spectrum of the DGE based on the at least two gain modes to obtain an adjusted attenuation spectrum, and

wherein the DGE is configured to perform, based on the adjusted attenuation spectrum, power attenuation processing on signals of different wavelengths in the second optical signal.

2. The optical amplifier of claim 1 , wherein the optical switch further comprises:
a first input port coupled to the first output end;
a second input port coupled to the second output end;
a first output port coupled to the second input end; and
a second output port coupled to the first input end,
wherein the optical amplifier further comprises a third output port, and
wherein the DGE further comprises a fourth output end coupled to the third output port.

3. The optical amplifier of claim 2 , wherein the at least two gain modes comprise: a first gain mode and a second gain mode, wherein when the optical amplifier is in the first gain mode, the first input port is coupled to the first output port and the second input port is coupled to the second output port to enable the input optical signal to sequentially flow through the first-stage optical amplifier system, the optical switch, the second-stage optical amplifier system, the optical switch, and the DGE and then to output from the optical amplifier, and wherein when the optical amplifier is in the second gain mode, the first input port is coupled to the second output port to enable the input optical signal to sequentially flow through the first-stage optical amplifier system, the optical switch, and the DGE and then to output from the optical amplifier.

4. The optical amplifier of claim 3 , wherein the at least two stages of optical amplifier systems further comprise a third-stage optical amplifier system coupled between the fourth output end and a fifth output end of the optical amplifier, wherein when the optical amplifier is in the first gain mode, the first-stage optical amplifier system, the second-stage optical amplifier system, and the third-stage optical amplifier system are configured to amplify and output the input optical signal, and wherein when the optical amplifier is in the second gain mode, the first-stage optical amplifier system and the third-stage optical amplifier system are configured to amplify and output the input optical signal.

5. The optical amplifier of claim 1 , wherein the control circuit is further configured to further adjust the attenuation spectrum based on input port data of the optical amplifier or output port data of the optical amplifier.

6. An optical amplifier comprising:
a dynamic gain equalizer (DGE);
at least two stages of optical amplifier systems comprising:
a first-stage optical amplifier system comprising a first output end and configured to:
amplify an input optical signal of the optical amplifier to obtain a first optical signal; and
output the first optical signal; and

a second-stage optical amplifier system comprising a first input end and configured to amplify a second optical signal;

an optical switch comprising a second input end positioned such that the DGE is disposed between the first output end and the second input end, comprising a second output end coupled to the first input end, and configured to:
set at least two gain modes of the optical amplifier, wherein amplification multiples of the optical amplifier are different when the optical amplifier is in different gain modes; and
output the second optical signal; and

a control circuit coupled to the optical switch and the DGE and configured to:
control the optical switch to set the at least two gain modes; and
adjust an attenuation spectrum of the DGE based on the at least two gain modes to obtain an adjusted attenuation spectrum, and

wherein the DGE is configured to perform, based on the adjusted attenuation spectrum, power attenuation processing on signals of different wavelengths in the first optical signal.

7. The optical amplifier of claim 6 , further comprising a coupler, wherein the DGE comprises a third output end, and wherein the optical switch further comprises:
a first input port coupled to the third output end;
a first output port coupled to the first input end; and
a second output port coupled to the coupler,
wherein the second-stage optical amplifier system further comprises a fourth output end coupled to the coupler, and
wherein the optical amplifier further comprises a third output port coupled to the coupler.

8. The optical amplifier of claim 7 , wherein the at least two gain modes comprise: a first gain mode and a second gain mode, wherein when the optical amplifier is in the first gain mode, the first input port is coupled to the first output port to enable the input optical signal to sequentially flow through the first-stage optical amplifier system, the DGE, the optical switch, the second-stage optical amplifier system, and the coupler and then to output from the optical amplifier, and wherein when the optical amplifier is in the second gain mode, the first input port is coupled to the second output port to enable the input optical signal to sequentially flow through the first-stage optical amplifier system, the DGE, the optical switch, and the coupler and then to output from the optical amplifier.

9. The optical amplifier of claim 6 , wherein the second-stage optical amplifier system further comprises a third output end, wherein the at least two stages of optical amplifier systems further comprise a third-stage optical amplifier system comprising a third input end and a fourth output end, wherein the optical amplifier further comprises two optical switches, wherein the two optical switches comprise:
a first optical switch comprising:
a first input port coupled to the DGE;
a first output port coupled to the first input end;
a second input port; and
a second output port coupled to the third input end; and

a second optical switch comprising:
a third input port coupled to the third output end;
a fourth input port coupled to the fourth output end;
a third output port; and
a fourth output port coupled to the second input port, and

wherein the optical amplifier further comprises a fifth output port coupled to the third output port.

10. The optical amplifier of claim 9 , wherein the at least two gain modes comprise: a first gain mode, a second gain mode, and a third gain mode; wherein when the optical amplifier is in the first gain mode, the first input port is coupled to the first output port, the second input port is coupled to the second output port, the third input port is coupled to the third o

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Kai
• Wu Bo
• Deng Ning

Classifications

• H04B10/2941 Primary

  using an equalising unit, e.g. a filter (H04B10/296 takes precedence) · CPC title

• H01S3/2308

  Amplifier arrangements, e.g. MOPA · CPC title

• H01S3/1301

  in optical amplifiers · CPC title

• H01S2301/04

  Gain spectral shaping, flattening · CPC title

• H01S3/10015

  by monitoring or controlling, e.g. attenuating, the input signal · CPC title