Pulsed frequency shifted feedback laser for accurate long distance measurements: Beat order determination

OPTICS COMMUNICATIONS

卷:286

Article

Pique, Jean-Paul

关键词: Laser;    Frequency-Shifted Feedback laser;    Long distance;    Long range;    Atmospheric measurements;    LIDAR;   

DOI  :  10.1016/j.optcom.2012.06.098

来源: Elsevier

【 摘 要 】

Long-distance measurements (10-1000 m) with an accuracy of 10(-7) is a challenge for many applications. We show that it is achievable with Frequency Shifted Feedback (FSF) laser interferometry technique, provided that the determination of the radio frequency beat order be made without ambiguity and on a time scale compatible with atmospheric applications. Using the pulsed-FSF laser that we developed for laser guide star application, we propose and test, up to 240 m, a simple method for measuring the beat order in real time. The moving-comb and Yatsenko models are also discussed. The first of these models fails to interpret our long-distance interferometry results. We show that the accuracy of long-distance measurements depends primarily on the stabilization of the acoustic frequency of the modulator. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free