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An optical-time-domain reflectometer has been constructed with a 1.55-microm Er(3+):glass laser, a TeO(2) 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 1.55microm wavelength.

Articles you may be interested inRepair of transparent defects on photomasks by laserinduced metal deposition from an aqueous solution J. Vac. Sci. Technol. B 8, 635 (1990); 10.1116/1.584988Laserinduced metal deposition on semiconductors from liquid electrolytes Appl.

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