Development of diode laser stack with high power and long pulse width for medical aesthetic application

Junli Li; Tuanwei Fu; Dong Hou; Jingwei Wang; Yunzhu Chen; Yanfang Zheng; Chungen Zah; Xingsheng Liu

doi:10.1117/12.2608522

4 March 2022 Development of diode laser stack with high power and long pulse width for medical aesthetic application

Junli Li, Tuanwei Fu, Dong Hou, Jingwei Wang, Yunzhu Chen, Yanfang Zheng, Chungen Zah, Xingsheng Liu

Proceedings Volume 11983, High-Power Diode Laser Technology XX; 119830R (2022) https://doi.org/10.1117/12.2608522
Event: SPIE LASE, 2022, San Francisco, California, United States

Conference Poster

Abstract

In this study, a high-power diode laser bar assembly is developed with good heat dissipation in long pulse operation mode. The thermal behavior and stress distribution are investigated in order to characterize the cooling capability and reliability. The optimal thermal resistance reaches 0.81K/W for each bar, based on the custom designed cooling plate, which is 0.6K/W lower than conventional coolers. The maximum thermal stress of laser bar is 39.4MPa under the working condition, which is less than half of the stress for previous conventional diode laser. Reliability of the device is improved as the diode laser works in a low stress status with long pulse width mode. The light power of the diode laser achieves 120W/bar with pulse duration of 30ms in 10Hz, and 200W/bar with 10ms, 10Hz, respectively. The diode laser of lifetime test passed 4.5×10⁷ shots under the condition of 30ms, 10Hz@120A.

Conference Presentation

Citation Download Citation

Junli Li, Tuanwei Fu, Dong Hou, Jingwei Wang, Yunzhu Chen, Yanfang Zheng, Chungen Zah, and Xingsheng Liu "Development of diode laser stack with high power and long pulse width for medical aesthetic application", Proc. SPIE 11983, High-Power Diode Laser Technology XX, 119830R (4 March 2022); https://doi.org/10.1117/12.2608522

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