Open AccessResearch on optical feedback characteristics of frequency modulated microchip Nd:YAG lasers
Author(s) -
Yidong Tan,
Shulian Zhang
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.6408
Subject(s) - optics , laser , longitudinal mode , modulation (music) , optical cavity , intensity (physics) , intensity modulation , frequency modulation , distributed feedback laser , materials science , physics , phase modulation , computer science , acoustics , radio frequency , telecommunications , phase noise
Optical feedback characteristics of frequency modulated microchip NdYAG lasers are investigated. Without optical feedbackthe output intensity changes by one fringe with the laser frequency changing by one longitudinal mode spacing. With optical feedbackthe modulation frequency of output intensity is proportional to the ratio of external cavity length to internal cavity length. The theoretical analysis based on three-cavity-mirror equivalent model is in good agreement with experimental results. The potential applications of this phenomenon in precision measurement are also discussed.