Design of a high-power semiconductor medical laser based on microprocessor control

Wendong Zou; Min Chen; Yiqing Gao

doi:10.1117/12.482989

12 September 2002 Design of a high-power semiconductor medical laser based on microprocessor control

Wendong Zou, Min Chen, Yiqing Gao

Proceedings Volume 4916, Optics in Health Care and Biomedical Optics: Diagnostics and Treatment; (2002) https://doi.org/10.1117/12.482989
Event: Photonics Asia, 2002, Shanghai, China

Abstract

This paper introduces the design of optics, power driver and control system of a high power semiconductor medical laser. The instrument adopts 980nm laser with maximum power output of 2W as therapeutic beam and 670nm laser of 3mW as aiming beam. The laser beams, after being collimated , can either be transmitted directly or be coupled through an optical fiber. In the driver of therapeutic laser, there exist current supply, protection circuit , temperature controller and light power feedback loop. The whole system is controlled by a microprocessor. With appropriate hardware and software, we've achieved , in our driver ,a variety of protection features including the ability to suppress transients and reduce noise, relay shorting protection , soft turn-on , current limit and overvoltage shut-off ,which keep the laser diode from damage. Meanwhile, we've also obtained a continuously adjustable optical power output with high accuracy and stability , both of which are vital to a safe and reliable

Citation Download Citation

Wendong Zou, Min Chen, and Yiqing Gao "Design of a high-power semiconductor medical laser based on microprocessor control", Proc. SPIE 4916, Optics in Health Care and Biomedical Optics: Diagnostics and Treatment, (12 September 2002); https://doi.org/10.1117/12.482989

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