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Proceedings Paper

A novel optical coherent domain reflectometer with dual frequency modulation
Author(s): L. Liu; Q. Liu; X. Fan; L. Ma; J. Du; Z. He
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Paper Abstract

We developed a novel optical coherent domain reflectometer (OCDR) technique with large measurement range by using of dual frequency modulation. The probe and local oscillator beams are frequency modulated independently, and the sensing position can be adjusted digitally via the time delay between the driving signals for the two modulators. Meanwhile, the frequency tuning spans of the two paths are different to enable heterodyne detection. In the demonstrational experiments, a spatial resolution of 3.9 m over a range of 24.6 km fiber was achieved with 35 MHz tunable range of the modulator, and the spatial resolution keeps a constant over the whole measurement range.

Paper Details

Date Published: 1 July 2015
PDF: 4 pages
Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553P (1 July 2015); doi: 10.1117/12.2185269
Show Author Affiliations
L. Liu, Shanghai Jiao Tong Univ. (China)
Q. Liu, Shanghai Jiao Tong Univ. (China)
X. Fan, Shanghai Jiao Tong Univ. (China)
L. Ma, Shanghai Jiao Tong Univ. (China)
J. Du, Shanghai Jiao Tong Univ. (China)
Z. He, Shanghai Jiao Tong Univ. (China)


Published in SPIE Proceedings Vol. 9655:
Fifth Asia-Pacific Optical Sensors Conference
Byoungho Lee; Sang-Bae Lee; Yunjiang Rao, Editor(s)

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