公开(公告)号：US10320151B1

公开(公告)日：2019-06-11

申请号：US15953250

申请日：2018-04-13

Applicant: Cisco Technology, Inc.

Inventor： Matthew J. Traverso ,  Dominic F. Siriani ,  Mark Webster

IPC: G02B6/12 ,  H01S5/10 ,  H01S5/028 ,  H01S5/12 ,  H01S5/022 ,  H01S5/125 ,  H01S5/22 ,  H01S5/30

Abstract: The embodiments herein describe a single-frequency laser source (e.g., a distributed feedback (DFB) laser or distributed Bragg reflector (DBR) laser) that includes a feedback grating or mirror that extends along a waveguide. The grating may be disposed over a portion of the waveguide in an optical gain region in the laser source. Instead of the waveguide or cavity being linear, the laser includes a U-turn region so that two ends of the waveguide terminate at the same facet. That facet is coated with an anti-reflective (AR) coating.