Title :
Evaluation of phase fluctuations of orthogonal optical eigen modes guided in an axially vibrating birefringent single-mode fiber
Author :
Oka, Kazuhiko ; Tsukada, Masato ; Ohtsuka, Yoshihiro
Author_Institution :
Dept. of Eng. Sci., Hokkaido Univ., Sapporo, Japan
fDate :
10/1/1990 12:00:00 AM
Abstract :
An optical heterodyne correlation-processing system is devised to process the phase fluctuations of the orthogonal linearly polarized two-frequency components guided in a length of axially vibrating birefringent single-mode fiber. Two wideband phase demodulators make it possible to take out separately both of the phase fluctuations of the two-frequency components from two generated beat photocurrents. The processing system provides the spectrum, the correlation, and the transfer function, as well as the coherency for the mechanically induced phase fluctuations. The phase-fluctuation characteristics and the system linearity are evaluated in terms of the statistical functions and the parameters obtained
Keywords :
birefringence; demodulation; eigenvalues and eigenfunctions; fibre optic sensors; fluctuations; optical correlation; optical transfer function; axially vibrating birefringent single-mode fiber; correlation; fibre optic sensors; generated beat photocurrents; mechanically induced phase fluctuations; optical heterodyne correlation-processing system; orthogonal optical eigen modes; phase fluctuations; statistical functions; transfer function; two-frequency components; wideband phase demodulators; Birefringence; Demodulation; Fluctuations; Linearity; Optical devices; Optical fiber polarization; Optical mixing; Photoconductivity; Transfer functions; Wideband;
Journal_Title :
Lightwave Technology, Journal of
