Patent ID: 11860041
Assignee: VIAVI SOLUTIONS INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 5:
6. A method for sensing a temperature distribution associated with a device under test (DUT), the method comprising:
emitting, from a first laser source, a first laser beam at a first wavelength for injection into the DUT;
emitting, from a second laser source, a second laser beam at a second wavelength for injection into the DUT, wherein the second wavelength is separated from the first wavelength by a fiber Raman shift;
converting, by a first wavelength optical receiver, a return signal corresponding to the first wavelength with respect to a Rayleigh backscatter signal at the first wavelength and a Raman backscatter Stokes signal at the second wavelength;
converting, by a second wavelength optical receiver, the return signal corresponding to the second wavelength with respect to a Rayleigh backscatter signal at the second wavelength and a Raman backscatter Anti-Stokes signal at the first wavelength; and
determining, by a processor, the temperature distribution associated with the DUT by utilizing the Raman backscatter Anti-Stokes signal at the first wavelength and the Raman backscatter Stokes signal at the second wavelength.