公开(公告)号：US20210226418A1

公开(公告)日：2021-07-22

申请号：US17226977

申请日：2021-04-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jialin ZHAO ,  Chengcheng GUI ,  Shengmeng FU

IPC: H01S5/10 ,  H04B10/50 ,  H04B10/572 ,  H01S5/026

Abstract: A multi-wavelength laser includes a reference wavelength-tunable laser, N−1 secondary wavelength-tunable lasers, N beam splitters, a phase modulator, and N−1 frequency difference detection apparatuses. The reference wavelength-tunable laser is connected to one beam splitter, the beam splitter includes two output ports, and one of the output ports is connected to the phase modulator. The phase modulator is separately connected to the N−1 frequency difference detection apparatuses. The N−1 secondary wavelength-tunable lasers one-to-one correspond to remaining N−1 beam splitters and the N−1 frequency difference detection apparatuses. The secondary wavelength-tunable laser is connected to a corresponding beam splitter, the corresponding beam splitter includes two output ports, and one of the output ports is connected to a corresponding frequency difference detection apparatus. N is a positive integer not less than 2. A multi-wavelength optical signal generated by the phase modulator has a precise frequency spacing.