US 12,451,665 B2
Semiconductor laser driving apparatus, electronic equipment, and manufacturing method of semiconductor laser driving apparatus
Nobuaki Kaji, Kanagawa (JP); and Hirohisa Yasukawa, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 17/641,258
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Jul. 20, 2020, PCT No. PCT/JP2020/028022
§ 371(c)(1), (2) Date Mar. 8, 2022,
PCT Pub. No. WO2021/053962, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 2019-168251 (JP), filed on Sep. 17, 2019.
Prior Publication US 2022/0285908 A1, Sep. 8, 2022
Int. Cl. H01S 5/02345 (2021.01); H01S 5/00 (2006.01); H01S 5/0239 (2021.01); H01S 5/026 (2006.01); H01S 5/06 (2006.01); H01S 5/068 (2006.01)
CPC H01S 5/02345 (2021.01) [H01S 5/0014 (2013.01); H01S 5/0239 (2021.01); H01S 5/0261 (2013.01); H01S 5/0262 (2013.01); H01S 5/0617 (2013.01); H01S 5/06804 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A semiconductor laser driving apparatus, comprising:
a substrate incorporating a laser driver;
a semiconductor laser mounted on one surface of the substrate to emit irradiation light from an irradiation surface;
connection wiring that electrically connects the laser driver and the semiconductor laser to each other with a wiring inductance of 0.5 nanohenries or less;
a temperature sensor for measuring a temperature relating to the semiconductor laser; and
a memory for storing control data from the laser driver to the semiconductor laser in a manner corresponding to the temperature,
wherein the memory stores, as the control data, a drive current for the semiconductor laser to output a predetermined laser power, and
wherein the laser driver reads the drive current corresponding to the predetermined laser power and corresponding to the temperature measured by the temperature sensor and outputs the read drive current to the semiconductor laser.