公开(公告)号：US11460347B2

公开(公告)日：2022-10-04

申请号：US16949715

申请日：2020-11-11

Applicant: Lumentum Operations LLC

Inventor： Colin Smith ,  Adrian Perrin Janssen ,  Stuart Conley

IPC: G01J9/02 ,  G02B17/00 ,  G02B27/10

Abstract: An optical locker may include an assembly. The assembly may include a beam splitter, configured to split an input beam into at least three beams; an etalon having at least three regions, positioned so that each beam passes through a different region; a detector configured to measure output intensities, Tn, of the etalon for the beam; and a controller configured to determine a ratio, Ta/Tb, of the output intensities, wherein that ratio has a slope at the output intensities which is above a threshold, obtain a target frequency of the input beam, and determine an actual frequency of the input beam based on the target frequency and the ratio of the output intensities.