Title :
Long Range and cm-Level Spatial Resolution Measurement Using Coherent Optical Frequency Domain Reflectometry With SSB-SC Modulator and Narrow Linewidth Fiber Laser
Author :
Koshikiya, Yusuke ; Fan, Xinyu ; Ito, Fumihiko
Author_Institution :
NTT Access Network Service Syst. Labs., NTT Corp., Tsukuba
Abstract :
This paper describes coherent optical frequency domain reflectometry (C-OFDR) with cm-level spatial resolution over 5 km. We propose the use of a single sideband with a suppressed carrier (SSB-SC) modulator and a narrow linewidth fiber laser as a tunable light source for C-OFDR. The advantage of using SSB-SC modulation is clarified theoretically by comparison with a double sideband with suppressed carrier modulation. We achieved cm-level spatial resolution over a 5-km measurement range and high sensitivity with a noise level 30 dB lower than the Rayleigh backscattering level.
Keywords :
fibre lasers; light sources; measurement by laser beam; optical modulation; reflectometry; Rayleigh backscattering; SSB-SC modulator; coherent optical frequency domain reflectometry; distance 5 km; narrow linewidth fiber laser; single sideband suppressed carrier modulator; spatial resolution measurement; suppressed carrier modulation; tunable light source; Fiber lasers; Frequency domain analysis; Frequency measurement; Laser noise; Laser theory; Optical modulation; Optical sensors; Reflectometry; Spatial resolution; Tunable circuits and devices; Narrow linewidth fiber laser; SSB modulation; optical fiber measurement; optical frequency domain reflectometry;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.928916
