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OTDR in single-mode fibre at 1.5 μm using heterodyne detection

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Abstract

Heterodyne detection has led to a significant improvement in the range performance of an optical time-domain reflectometer designed to operate on single-mode fibre at a wavelength of 1.52 μm. With only 5 μW peak launched power a range of 30 km was achieved.

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content/journals/10.1049/el_19820585
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