Frequency locking of diode-pumped Nd:YAG lasers with the digital PID method at 532-nm iodine lines in incoherent wind lidar

Songhua Wu; Dapeng Sun; Zhishen Liu

doi:10.1117/12.466460

21 March 2003 Frequency locking of diode-pumped Nd:YAG lasers with the digital PID method at 532-nm iodine lines in incoherent wind lidar

Songhua Wu, Dapeng Sun, Zhishen Liu

Author Affiliations +

Proceedings Volume 4893, Lidar Remote Sensing for Industry and Environment Monitoring III; (2003) https://doi.org/10.1117/12.466460
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

In our new compact DDWL (direct-detect wind lidar), we use a CrystaLaser model IRCL-100-1064S laser as a seeder, which has a thermal frequency actuator inside. Given that the external frequency actuator can only achieve green radiation stability and are technically complicated and difficult of application, here we describe a simpler method-applying improved digital PID algorithm to a servo in the compact commercial CrystaLaser laser. A PID algorithm simplifies regulation of even the most difficult cryogenic systems. The PID controller can anticipate the load action to provide closer temperature stability for the laser frequency stabilization. After setting the desired locking point to the process, the controller calculates the output with improved digital PID algorithm, and the output is fed back into the thermal actuator of the laser, which keep the laser locked to the iodine line at a central laser frequency stability level of better than 1 MHz for arbitrarily long periods.

Citation Download Citation

Songhua Wu, Dapeng Sun, and Zhishen Liu "Frequency locking of diode-pumped Nd:YAG lasers with the digital PID method at 532-nm iodine lines in incoherent wind lidar", Proc. SPIE 4893, Lidar Remote Sensing for Industry and Environment Monitoring III, (21 March 2003); https://doi.org/10.1117/12.466460

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