公开(公告)号：US20210184420A1

公开(公告)日：2021-06-17

申请号：US16903246

申请日：2020-06-16

Applicant: II-VI DELAWARE, INC.

Inventor： Zhiqian Zhu ,  Ian Peter McClean ,  Yongjun Fu ,  Yongshi Gu

IPC: H01S3/13 ,  G01R19/165 ,  H01S3/067 ,  H01S3/16 ,  H01S3/10 ,  H01S3/094

Abstract: An EDFA may include an input photodiode configured to generate a control signal based on an input signal. The EDFA may include a blind stage configured to generate an amplified signal based on the control signal and the input signal. The EDFA may include a non-blind stage configured to generate an output signal based on the amplified signal within the blind stage, the control signal, and a feedback signal. The EDFA may include a filter configured to generate a filtered signal based on the output signal. The EDFA may include an output photodiode configured to generate the feedback signal based on the filtered signal. The EDFA may include an alarm device. A signal within the non-blind stage may be generated based on the feedback signal and the control signal. The alarm device may be configured to generate an alarm signal when the signal exceeds a threshold value.

公开(公告)号：US11677209B2

公开(公告)日：2023-06-13

申请号：US16903246

申请日：2020-06-16

Applicant: II-VI DELAWARE, INC.

Inventor： Zhiqian Zhu ,  Ian Peter McClean ,  Yongjun Fu ,  Yongshi Gu

IPC: H01S3/13 ,  H01S3/067 ,  H01S3/094 ,  G01R19/165 ,  H01S3/16 ,  H01S3/10

CPC classification number: H01S3/1305 ,  G01R19/16571 ,  H01S3/0677 ,  H01S3/06716 ,  H01S3/094003 ,  H01S3/10023 ,  H01S3/1301 ,  H01S3/1608 ,  H01S2301/02

Abstract: An EDFA may include an input photodiode configured to generate a control signal based on an input signal. The EDFA may include a blind stage configured to generate an amplified signal based on the control signal and the input signal. The EDFA may include a non-blind stage configured to generate an output signal based on the amplified signal within the blind stage, the control signal, and a feedback signal. The EDFA may include a filter configured to generate a filtered signal based on the output signal. The EDFA may include an output photodiode configured to generate the feedback signal based on the filtered signal. The EDFA may include an alarm device. A signal within the non-blind stage may be generated based on the feedback signal and the control signal. The alarm device may be configured to generate an alarm signal when the signal exceeds a threshold value.