48W continuous-wave output power with high efficiency from a single emitter laser diode at 915nm

Guowen Yang; Yuxian Liu; Yongming Zhao; Song Tang; Yuliang Zhao; Yu Lan; Longgang Bai; Ling Yi; Ximin Wang; Abdullah Demir

doi:10.1117/12.2650049

14 March 2023 48W continuous-wave output power with high efficiency from a single emitter laser diode at 915nm

Guowen Yang, Yuxian Liu, Yongming Zhao, Song Tang, Yuliang Zhao, Yu Lan, Longgang Bai, Ling Yi, Ximin Wang, Abdullah Demir

Author Affiliations +

Proceedings Volume 12403, High-Power Diode Laser Technology XXI; 124030H (2023) https://doi.org/10.1117/12.2650049
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Improving the power and efficiency of 9xx-nm broad-area laser diodes reduces the cost of laser systems and expands applications. LDs with more than 25 W output power combined with power conversion efficiency (PCE) above 65% can provide a cost-effective high-power laser module. We report a high output power and high conversion efficiency laser diode operating at 915 nm by investigating the influence of the laser internal parameters on its output. The asymmetric epitaxial structure is optimized to achieve low optical loss while considering high internal efficiency, low series resistance, and modest optical confinement factor. Experimental results show an internal optical loss of 0.31 cm^-1 and internal efficiency of 96%, in agreement with our simulation results. Laser diodes with 230 μm emitter width and 5 mm cavity length have T₀ and T₁ characteristic temperatures of 152 and 567 K, respectively. The maximum power conversion efficiency reaches 74.2% at 5 °C and 72.6% at 25 °C, and the maximum output power is 48.5 W at 48 A (at 30 °C), the highest reported for a 9xx-nm single emitter laser diode. At 25 °C, a high PCE of 67.5% is achieved for the operating power of 30 W at 27.5 A, and the lateral far-field angle with 95% power content is around 8°. Life test results show no failure in 1200 hours for 55 laser diodes. In addition, 55.5 W output was achieved at 55 A from a laser diode with 400 μm emitter width and 5.5 mm cavity length. A high PCE of 64.3% is obtained at 50 W with 47 A.

Conference Presentation

Citation Download Citation

Guowen Yang, Yuxian Liu, Yongming Zhao, Song Tang, Yuliang Zhao, Yu Lan, Longgang Bai, Ling Yi, Ximin Wang, and Abdullah Demir "48W continuous-wave output power with high efficiency from a single emitter laser diode at 915nm", Proc. SPIE 12403, High-Power Diode Laser Technology XXI, 124030H (14 March 2023); https://doi.org/10.1117/12.2650049

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