Share Email Print
cover

Proceedings Paper

Highly sensitive reflectometry over 20 km with sub-meter spatial resolution based on phase-noise-compensated optical frequency domain reflectometry and concatenative reference method
Author(s): Xinyu Fan; Yusuke Koshikiya; Fumihiko Ito
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Highly sensitive reflectometry over 20 km with a sub-meter spatial resolution based on phase noise compensated optical frequency domain reflectometry and the concatenative reference method is proposed and demonstrated experimentally. A fiber laser is used as a light source to extend the measurement range although the distance remains limited to the laser coherence length because of the existence of laser phase noise. To reduce the influence of laser phase noise, the measurement signal is compensated using reference signals generated from a single auxiliary interferometer supported by a newly developed compensation process. By using the proposed technique, the measurement range is extended to 20 km with a sub-meter resolution and a sensitivity (relative to the Rayleigh backscattering level) of about -30 dB, which is nearly impossible to realize with the OTDR technique. The entire measurement time is 20 ms and the processing time is 20 s for each section.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70043L (16 May 2008); doi: 10.1117/12.785731
Show Author Affiliations
Xinyu Fan, NTT Access Network Service Systems Labs. (Japan)
Yusuke Koshikiya, NTT Access Network Service Systems Labs. (Japan)
Fumihiko Ito, NTT Access Network Service Systems Labs. (Japan)


Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors

© SPIE. Terms of Use
Back to Top