US 12,259,317 B2
Broadband pulsed light source apparatus and spectroscopic measurement method
Junki Sahara, Tokyo (JP); and Aya Ota, Tokyo (JP)
Assigned to Ushio Denki Kabushiki Kaisha, Tokyo (JP)
Appl. No. 17/632,427
Filed by Ushio Denki Kabushiki Kaisha, Tokyo (JP)
PCT Filed Jul. 29, 2020, PCT No. PCT/JP2020/029168
§ 371(c)(1), (2) Date Feb. 2, 2022,
PCT Pub. No. WO2021/024890, PCT Pub. Date Feb. 11, 2021.
Claims priority of application No. 2019-142715 (JP), filed on Aug. 2, 2019.
Prior Publication US 2022/0276153 A1, Sep. 1, 2022
Int. Cl. G01N 21/31 (2006.01)
CPC G01N 21/31 (2013.01) [G01N 2201/06113 (2013.01); G01N 2201/0635 (2013.01); G01N 2201/0636 (2013.01); G01N 2201/08 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A broadband pulsed light source apparatus comprising:
a pulsed laser source;
a nonlinear element structured to provide a nonlinear effect to light output from the pulsed laser source, so as to output supercontinuum light; and
a notch filter structured to attenuate light component having an oscillation wavelength of the pulsed laser source contained in the supercontinuum light output from the nonlinear element, wherein the notch filter includes a volume Bragg grating filter, and wherein the volume Bragg grating filter is structured to have a stopband corresponding to the oscillation wavelength.