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A laser radar used in an automatic driving system was designed to operate normally in rainy and foggy weather while ensuring eye safety. The laser radar uses the principle of triangulation to measure the distance while adjusting the position of the focused light source by the beam expanding and focusing module. The laser radar used a home-made passively Q-switched Er:YAG laser that used a home-made TiS2 as a saturable absorber with an operating wavelength of 1645 nm. At an absorption pump power of 10.54 W, the passively Q-switched Er:YAG laser had a pulse repetition frequency of 37 kHz, a maximum average output power of 1.44 W, a pulse duration of 1.1 μs, and a pulse energy of 36.39 μJ.
Guoqiang Li,Chi Wu, andJuan Su
"A type of lidar sensor uses a 1645 nm laser using TiS2 as a saturable absorber", Proc. SPIE 11333, AOPC 2019: Advanced Laser Materials and Laser Technology, 1133307 (18 December 2019); https://doi.org/10.1117/12.2539002
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Guoqiang Li, Chi Wu, Juan Su, "A type of lidar sensor uses a 1645 nm laser using TiS2 as a saturable absorber," Proc. SPIE 11333, AOPC 2019: Advanced Laser Materials and Laser Technology, 1133307 (18 December 2019); https://doi.org/10.1117/12.2539002