Open AccessSelf-mixing interference effects with a folding feedback cavity in Zeeman-birefringence dual frequency laser
Author(s) -
Wei Mao,
Shulian Zhang,
Liu Cui,
Yidong Tan
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.14.000182
Subject(s) - optics , birefringence , physics , interference (communication) , zeeman effect , laser , prism , polarization (electrochemistry) , materials science , channel (broadcasting) , chemistry , electrical engineering , quantum mechanics , magnetic field , engineering
The self-mixing interference effects with a folding feedback cavity in a Zeeman-birefringence dual frequency laser have been investigated theoretically and experimentally. The fringe frequency of the self-mixing interference system can be doubled due to the hollow cube corner prism, with which a folding cavity is formed. The intensities of the two frequencies are changed periodically in the modulation of the external cavity length. When the phase difference between the two frequencies equals pi/2, the intensity modulation curves can be divided into four zones with equal width in a period. Each zone corresponds to one polarization state. Based on the experimental results, a novel displacement sensor with a high resolution of lambda/16, as well as functions of direction discrimination, is discussed.