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Optical frequency domain reflectometry with high sensitivity and resolution using optical synchronous detection with coded modulators

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2 Author(s)
Dolfi, D.W. ; Hewlett-Packard Lab., Palo Alto, CA, USA ; Nazarathy, M.

A new optical frequency domain reflectometry (OFDR) method is demonstrated. Two broadband, coded, travelling-wave electro-optic LiNbO3 modulators are used over a 25.6 GHz frequency range, one as a source and the other as an optical synchronous detector. A 4 mm resolution in fibre is achieved, along with a dynamic range improvement of approximately=18 dB (optical) over previous OFDR results.

Published in:

Electronics Letters  (Volume:25 ,  Issue: 2 )