Abstract
An optical-time-domain reflectometer has been constructed with a 1.55-μm Er3+:glass laser, a TeO2 acousto-optical directional coupler, and a cooled Ge P-I-N photodiode. With it, a maximum detectable fault-location length of 130 km for single-mode optical fiber has been successfully achieved at a 1.55-μm wavelength.
© 1984 Optical Society of America
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