Patent ID: 11906668
Assignee: BEIJING VOYAGER TECHNOLOGY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 14:
15. An optical sensing method, comprising:
emitting, by a first laser source, a first laser beam having a first wavelength equal to or above 1,100 nm;
emitting, by a second laser source, a second laser beam having a second wavelength different than the first wavelength; and
converting, by a wavelength converter, the first laser beam and the second laser beam into a converted laser beam having a third wavelength below 1,100 nm, wherein the converting the first laser beam and the second laser beam into the converted laser beam comprises:
setting, by a temperature controller, a temperature of a nonlinear optical material based on the third wavelength of the converted laser beam, and
performing, by the nonlinear optical material, optical frequency mixing of the first laser beam and the second laser beam,
wherein the first laser source and the second laser source are separate.