公开(公告)号：US20180010967A1

公开(公告)日：2018-01-11

申请号：US15677146

申请日：2017-08-15

Applicant: Intuitive Surgical Operations, Inc.

Inventor： Ryan SEELEY ,  Mark E. FROGGATT

IPC: G01J9/02

CPC classification number: G01J9/0246 ,  H01S3/1303 ,  H01S3/1305 ,  H01S3/1307

Abstract: A tunable laser system includes a tunable laser to be scanned over a range of frequencies and an interferometer having a plurality of interferometer outputs. At least two interferometer outputs of the plurality of interferometer outputs have a phase difference. A wavelength reference has a spectral feature within the range of frequencies, and the spectral feature does not change in an expected operating environment of the tunable laser. Processing circuitry uses the spectral feature and the plurality of interferometer outputs to produce an absolute measurement of a wavelength of the tunable laser and controls the tunable laser based on a comparison of the absolute measurement of the wavelength of the tunable laser with a setpoint wavelength.