Patent ID: 11933730
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A light source employed in a coherent Raman scattering (CRS) spectroscopic apparatus or a CRS microscope, the light source comprising:
a chromium forsterite laser (CrFL);
a variable delay optical path configured to delay one optical pulse of branched optical pulses obtained by dividing an optical pulse from the CrFL according to a power;
a highly nonlinear waveguide into which the other optical pulse of the branched optical pulses of the optical pulse from the CrFL is input;
a first wavelength filter connected to an output of the highly nonlinear waveguide;
an ytterbium-doped glass fiber optical amplifier (YbFA) connected to an output of the first wavelength filter; and
a second wavelength filter connected to an output of the YbFA,
wherein the light source includes a one-optical path mode in which two wavelength bands corresponding to a Raman scattering wavenumber to be used for measurement are selected from an output of the variable delay optical path, and a two-optical path mode in which an output of the variable delay optical path and an output of the second wavelength filter are time-synchronized so that two wavelength bands corresponding to a Raman scattering wavenumber to be used for measurement are selected from the output of the variable delay optical path and the output of the second wavelength filter that are time-synchronized.