905nm line-beam laser module with high reliability for automotive LiDAR applications

Yingmin Fan; Hao Zhang; Jiayan Yang; Peng Wang; Wenfang Zhang; Yixiao He; Xiaoyu Tian; Tuanwei Fu; Guopeng Zhang; Chung-en Zah; Xingsheng Liu

doi:10.1117/12.2650886

14 March 2023 905nm line-beam laser module with high reliability for automotive LiDAR applications

Yingmin Fan, Hao Zhang, Jiayan Yang, Peng Wang, Wenfang Zhang, Yixiao He, Xiaoyu Tian, Tuanwei Fu, Guopeng Zhang, Chung-en Zah, Xingsheng Liu

Author Affiliations +

Proceedings Volume 12403, High-Power Diode Laser Technology XXI; 124030T (2023) https://doi.org/10.1117/12.2650886
Event: SPIE LASE, 2023, San Francisco, California, United States

Conference Poster

Abstract

The line-scanning LiDAR (Light Detection and Ranging) has the advantages of relatively simple structure and longdistance detection, so it is widely adopted by many key players. However, one challenge of this method lies in the realization of the line-beam laser module with high peak power, small divergence angle, high reliability, and low cost. In this work, we introduce our line-beam laser modules based on 905nm triple-junction EEL with unique optical and structure design. The modules have a uniform line beam with a peak power larger than 800W, a pulse width of less than 6ns and repetition rate of 100 kHz. The divergence angle of the line beam is less than 0.15°@ 1/e2. The FOI (field of illumination) is 25° and the intensity uniformity is better than 90%. The Low/High-temperature-operation test data showed that over a wide temperature range from - 40 ℃ to 85 ℃ the power variation of the line beam module is less than 10%, and the variation of the divergence angle is less than 0.02 deg. Other reliability tests including temperature cycling from -40 ℃ to 120 ℃, and lifetime were also introduced.

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Yingmin Fan, Hao Zhang, Jiayan Yang, Peng Wang, Wenfang Zhang, Yixiao He, Xiaoyu Tian, Tuanwei Fu, Guopeng Zhang, Chung-en Zah, and Xingsheng Liu "905nm line-beam laser module with high reliability for automotive LiDAR applications", Proc. SPIE 12403, High-Power Diode Laser Technology XXI, 124030T (14 March 2023); https://doi.org/10.1117/12.2650886

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