Abstract
We present a laser Doppler velocimeter that stores and delays the reference beam to preserve coherence with a long-path-length measurement beam. Our storage and delay technique relaxes the strict coherence requirements associated with lidar laser sources, permitting the use of low-coherence lasers. This technique potentially could reduce the cost and size of lidar systems for commercial applications. Experiments that use fiber-optic ring resonators to store the reference beams and generate reference pulse trains validated the concept. We obtained results at several simulated distances by beating each usable reference pulse with a delayed Doppler-shifted measurement beam reflected off a rotating mirror.
© 2001 Optical Society of America
Full Article | PDF ArticleMore Like This
Jyi-Lai Shen and Rainer Künnemeyer
Appl. Opt. 45(32) 8346-8349 (2006)
Youzhi Li, Alan Hoskins, Friso Schlottau, Kelvin H. Wagner, Carl Embry, and William Randall Babbitt
Appl. Opt. 45(25) 6409-6420 (2006)
Vladimir Stoykov Marinov and Dimitar Vassilev Stoyanov
Appl. Opt. 38(12) 2579-2585 (1999)