US 12,413,038 B2
Optical amplifier, optical signal processing method, and storage medium
Kai Zhang, Chengdu (CN); Bo Wu, Chengdu (CN); and Ning Deng, Shenzhen (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on May 27, 2022, as Appl. No. 17/827,224.
Application 17/827,224 is a continuation of application No. PCT/CN2020/100848, filed on Jul. 8, 2020.
Claims priority of application No. 201911203051.3 (CN), filed on Nov. 29, 2019.
Prior Publication US 2022/0294171 A1, Sep. 15, 2022
Int. Cl. H01S 3/067 (2006.01); H01S 3/10 (2006.01); H01S 3/13 (2006.01); H04B 10/294 (2013.01)
CPC H01S 3/06754 (2013.01) [H01S 3/10015 (2013.01); H01S 3/13013 (2019.08); H01S 2301/04 (2013.01); H04B 10/2941 (2013.01)] 20 Claims
OG exemplary drawing
 
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.