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.
© 2008 IEEE
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