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4 March 2022 High peak power tapered RWG laser diodes for eye-safe LIDAR applications around 1.5 μm wavelength
Topi Uusitalo, Jukka Viheriälä, Heikki Virtanen, Santeri Hanhinen, Roosa Hytönen, Jari Lyytikäinen, Mircea Guina
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Proceedings Volume 11983, High-Power Diode Laser Technology XX; 119830Q (2022) https://doi.org/10.1117/12.2608601
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
High peak power and brightness eye-safe lasers are desired in automotive LIDAR, for example. We address this need by developing tapered ridge waveguide lasers with highly asymmetric InGaAsP/InP epilayer emitting at around 1.5 μm wavelength. The structure allows state-of-the-art peak power of 7.3 W at 50 A current. Preliminary beam quality results indicate that the epi-design enables higher beam brightness than more traditional structures when driven with high amplitude current pulses. Results indicate that further improvements in power and brightness characteristics are possible with more optimized cavity layout and laser driver design.
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Topi Uusitalo, Jukka Viheriälä, Heikki Virtanen, Santeri Hanhinen, Roosa Hytönen, Jari Lyytikäinen, and Mircea Guina "High peak power tapered RWG laser diodes for eye-safe LIDAR applications around 1.5 μm wavelength", Proc. SPIE 11983, High-Power Diode Laser Technology XX, 119830Q (4 March 2022); https://doi.org/10.1117/12.2608601
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KEYWORDS
Semiconductor lasers
LIDAR
Measurement devices
Pulsed laser operation
Quantum wells
Collimation
Optical testing
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