High-power semiconductor laser chips for fiber-laser-based Lidar pump applications

Xiaohang Liu; Yihan Xiong; Ching-Long Jiang; Prasanta Modak; Ayesha Jamil; Xi Liu; Stewart McDougall

doi:10.1117/12.2650446

14 March 2023 High-power semiconductor laser chips for fiber-laser-based Lidar pump applications

Xiaohang Liu, Yihan Xiong, Ching-Long Jiang, Prasanta Modak, Ayesha Jamil, Xi Liu, Stewart McDougall

Proceedings Volume 12403, High-Power Diode Laser Technology XXI; 1240309 (2023) https://doi.org/10.1117/12.2650446
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Fiber lasers are becoming an increasingly important option for LIDAR light sources in autonomous driving technology due to their operation in the eye safe 1550 nm spectral region and their intrinsic high beam quality, power and pulse characteristics. As an essential component for the pumping of fiber lasers, semiconductor laser diodes with high temperature stability, power and reliability are necessary. In this report we present the results of a continuous-wave (CW) single edge emitting laser diode designed to operate at 94x nm at 25 °C heat sink temperature and 97x nm at 100 °C. Various epitaxial and laser geometry designs have been implemented to optimize the laser performance over this wide environmental temperature range. The laser epitaxy is based on the AlGaAs/GaAs material system, with an InGaAs strained quantum well (QW). With various designs of laser geometry including emitting area and cavity length, devices are designed, grown, fabricated, and tested with the optimized design improving the temperature stability, power, and efficiency of the laser chip. A peak efficiency of over 54% at heat sink temperature of 105 °C and over 12 W before thermal roll-over occurs has been achieved. In addition to the thermal performance we also report the slow axis beam parameter product of the chip of <5 mm.mrad with polarization purity >98% at operating current and show the preliminary reliability data at the high temperature operation.

Conference Presentation

Citation Download Citation

Xiaohang Liu, Yihan Xiong, Ching-Long Jiang, Prasanta Modak, Ayesha Jamil, Xi Liu, and Stewart McDougall "High-power semiconductor laser chips for fiber-laser-based Lidar pump applications", Proc. SPIE 12403, High-Power Diode Laser Technology XXI, 1240309 (14 March 2023); https://doi.org/10.1117/12.2650446

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available