Design of a 1.65- mu m-band optical time-domain reflectometer

The design and performance of a 1.65- mu m-band single-mode optical time-domain reflectometer (OTDR) with a laser diode source are described. The approach employs a high-power laser diode with a strained-layer InGaAs/InGaAsP multiple-quantum-well (MQW) structure which is grown by metalorganic vapor phase epitaxy (MOVPE), an InGaAs avalanche photodiode, and methods for reducing the optical wiring loss in an optical unit. A 1.65- mu m-band OTDR is realized with a single-way dynamic range of 25 dB at a pulse width of 1.0 mu s.<
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