We demonstrate a novel technique to enlarge the measurement range of a correlation-based fiber Brillouin distributed sensing system using double lock-in amplifiers and a single-sideband modulator. 300-m measurement range with 20-cm spatial resolution is achieved without any optical filter.
© 2006 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2300) Fiber optics and optical communications : Fiber measurements
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
K. Song and K. Hotate, " Enlargement of Measurement Range in a Brillouin Optical Correlation Domain Analysis System Using Double Lock-in Amplifiers and a Single-Sideband Modulator," in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2006), paper OThA6.