US 11,942,751 B2
Laser device
Takashi Kurita, Hamamatsu (JP); Ryo Yoshimura, Hamamatsu (JP); Ryo Makino, Hamamatsu (JP); and Yuu Takiguchi, Hamamatsu (JP)
Assigned to HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Appl. No. 18/032,403
Filed by HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
PCT Filed Sep. 29, 2021, PCT No. PCT/JP2021/035955
§ 371(c)(1), (2) Date Apr. 18, 2023,
PCT Pub. No. WO2022/085385, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 2020-178067 (JP), filed on Oct. 23, 2020.
Prior Publication US 2024/0030672 A1, Jan. 25, 2024
Int. Cl. H01S 3/00 (2006.01); B23K 26/064 (2014.01); G02F 1/01 (2006.01); G02F 1/133 (2006.01); G02F 1/137 (2006.01)
CPC H01S 3/0085 (2013.01) [B23K 26/064 (2015.10); G02F 1/0136 (2013.01); G02F 1/13318 (2013.01); G02F 1/137 (2013.01); H01S 3/0014 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A laser device comprising:
a laser light source configured to emit laser light;
a phase control unit configured to receive the laser light emitted from the laser light source, to control a spatial phase of a portion of the laser light, to emit the portion of the light as control light, and to emit another portion of the laser light as non-control light;
a first optical system configured to irradiate an object with the control light emitted from the phase control unit;
a detector configured to detect the non-control light emitted from the phase control unit;
a second optical system configured to cause the non-control light emitted from the phase control unit to converge toward a detection surface of the detector; and
a control unit configured to execute a correction process for controlling the phase control unit to correct a control state for a spatial phase of the control light in the phase control unit on the basis of a detection result for the non-control light from the detector.