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A Rayleigh backscattered signal over 147.7 km of single-mode optical fibre has been observed for the first time by long-range, optical time-domain reflectometry (OTDR) usinga 1.54 μm high-power semiconductor laser (LD) and a GaInAs/InP APD with a small dark current at room temperature. A one-way backscattered dynamic range of 29.3 dB at room temperature has been achieved.
Inspec keywords: III-V semiconductors; avalanche photodiodes; gallium arsenide; Rayleigh scattering; optical fibres; indium compounds; time-domain reflectometry; semiconductor junction lasers
Other keywords:
Subjects: Stimulated Raman scattering and spectra; CARS; stimulated Brillouin and stimulated Rayleigh scattering and spectra; Optical communication; Light emitting diodes; Fibre optics; Optical fibre testing and measurement of fibre parameters; Laser beam applications; Laser applications