US 12,009,638 B2
Surface emission laser driving method and surface emission laser device
Osamu Maeda, Kanagawa (JP); Shota Watanabe, Kanagawa (JP); Motoi Kimura, Kanagawa (JP); and Jugo Mitomo, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 17/286,540
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed Oct. 29, 2019, PCT No. PCT/JP2019/042341
§ 371(c)(1), (2) Date Apr. 19, 2021,
PCT Pub. No. WO2020/100572, PCT Pub. Date May 22, 2020.
Claims priority of application No. 2018-215382 (JP), filed on Nov. 16, 2018.
Prior Publication US 2021/0384710 A1, Dec. 9, 2021
Int. Cl. H01S 5/42 (2006.01); H01S 5/042 (2006.01); H01S 5/0683 (2006.01)
CPC H01S 5/42 (2013.01) [H01S 5/06835 (2013.01); H01S 5/04256 (2019.08)] 4 Claims
OG exemplary drawing
 
1. A surface emission laser driving method comprising:
generating a plurality of drive pulses to be sequentially outputted to, out of a plurality of surface emission lasers disposed on a same substrate, each of the surface emission lasers selected as light-emission targets, on a basis of the number of surface emission lasers selected as the light-emission targets and a monitoring temperature that is immediately prior to light emission of each of the surface emission lasers selected as the light-emission targets; and
outputting the plurality of generated drive pulses to each of the surface emission lasers selected as the light-emission targets, wherein the monitoring temperature is measured by a temperature sensor that is disposed at a position at which a thermal time constant from an active layer of each of the surface emission lasers becomes shorter than a pulse interval of the plurality of drive pulses.