Title :
Phase noise considerations in coherent optical FMCW reflectometry
Author :
Venkatesh, Shalini ; Sorin, Wayne V.
Author_Institution :
Hewlett-Packard Labs., Palo Alto, CA, USA
fDate :
10/1/1993 12:00:00 AM
Abstract :
An analysis of coherent optical FMCW is presented. It shows the limitations imposed on measurements of discrete reflections and of Rayleigh backscattering due to phase noise originating in the finite coherence length of the optical source. The dependence of the range for accurate measurements on particular parameters of the optical system is discussed in the general case and for three specific laser sources
Keywords :
Rayleigh scattering; backscatter; fibre optic sensors; frequency modulation; light coherence; optical modulation; reflectometry; Rayleigh backscattering; coherent optical FMCW reflectometry; discrete reflections; finite coherence length; frequency modulated continuous wave ranging; laser sources; optical modulation; optical source; optical system; phase noise; phase noise considerations; Acoustic reflection; Backscatter; Length measurement; Noise measurement; Optical noise; Optical reflection; Particle measurements; Phase measurement; Phase noise; Reflectometry;
Journal_Title :
Lightwave Technology, Journal of
