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

Claim 0:
1. A temperature distribution sensor comprising:
a first laser source to emit a first laser beam at a first wavelength for injection into a device under test (DUT);
a second laser source to emit 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;
a first wavelength optical receiver to convert a return signal at the first wavelength with respect to a Rayleigh backscatter signal at the first wavelength and a Raman backscatter Stokes signal at the second wavelength;
a second wavelength optical receiver to convert a return signal at 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;
a processor; and
a memory storing machine readable instructions that when executed by the processor cause the processor to:
determine a distributed temperature 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.