US 11,894,652 B2
Passive Q switching laser device, control method, and laser processing device
Yasuyuki Ishihama, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/610,408
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Mar. 31, 2020, PCT No. PCT/JP2020/014803
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2020/235222, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-095324 (JP), filed on May 21, 2019.
Prior Publication US 2022/0209489 A1, Jun. 30, 2022
Int. Cl. H01S 3/113 (2006.01); H01S 3/094 (2006.01); H01S 3/0941 (2006.01); H01S 3/102 (2006.01); H01S 5/042 (2006.01); H01S 3/13 (2006.01); B23K 26/082 (2014.01)
CPC H01S 3/113 (2013.01) [H01S 3/0941 (2013.01); H01S 3/102 (2013.01); H01S 5/0427 (2013.01); B23K 26/082 (2015.10); H01S 3/094076 (2013.01); H01S 3/1305 (2013.01); H01S 3/1307 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A passive Q switching laser device, comprising:
a passive Q switching laser that includes an excitation light source that emits excitation light, and a resonator that is excited by the excitation light to emit oscillation light;
a signal source that outputs a drive signal for driving the excitation light source;
a modulation unit that modulates, on a basis of emission timing at which the oscillation light has been emitted from the passive Q switching laser, the drive signal output from the signal source; and
a power source unit that drives, on a basis of the drive signal modulated by the modulation unit, the excitation light source to emit the excitation light,
wherein the drive signal is a pulse signal,
wherein the power source unit causes the excitation light source to emit the excitation light while the drive signal modulated by the modulation unit is at an on-level, and
wherein the modulation unit modulates a time period of the on-level of the pulse signal output from the signal source.