1.5- mu m-band optical time domain reflectometer for single-mode optical fiber using a P/sub 2/O/sub 5/-highly-doped fiber Raman laser

A wide-dynamic-range 1.5- mu m-band optical time-domain reflectometer (OTDR) for single-mode optical fibers using a P/sub 2/O/sub 5/-highly-doped fiber Raman laser light source and a cooled Ge-p-i-n photodiode is realized for the first time. The stimulated-Raman-scattering properties of P/sub 2/O/sub 5/-doped single-mode fiber are investigated. Using this fiber and an Nd:YAG laser operating at 1.32 mu m, a high-power light pulse at 1.59 mu m is generated with high efficiency. Using the stimulated-Raman-scattering light as the light source and a high-sensitivity optical receiver, a 1.5- mu m-band OTDR having a one-way dynamic range of 35 dB is realized.<
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