公开(公告)号：US20250116814A1

公开(公告)日：2025-04-10

申请号：US18525564

申请日：2023-11-30

Applicant: Lumentum Operations LLC

Inventor： Cailin WEI ,  Jihua DU ,  Prasad YALAMANCHILI ,  Liang ZHAO ,  Hao XU

IPC: G02B6/26 ,  G02B6/38 ,  G02B6/42

Abstract: A laser redundancy device includes a plurality of lasers and a PLC that includes a plurality of input waveguides, a plurality of first couplers, a plurality of intermediate waveguides, a plurality of second couplers, and a plurality of output waveguides. Each first coupler includes a plurality of first input arms and a plurality of first output arms. Each second coupler includes a plurality of second input arms and a plurality of second output arms. Each first coupler is connected to: two or more input waveguides via the plurality of first input arms, and the plurality of second couplers via the plurality of first output arms, two or more intermediate waveguides, and respective second input arms of the plurality of second couplers. Each second coupler is connected to two or more output waveguides via the plurality of second output arms.