Enlargement of measurement range in a Brillouin optical correlation domain analysis system using double lock-in amplifiers and a single-sideband modulator

Author

Song, Kwang-Yong ; Hotate, Kazuo

Author_Institution

Dept. of Electron. Eng., Tokyo Univ.

fYear

2006

fDate

5-10 March 2006

Abstract

We demonstrate a novel technique to enlarge the measurement range of a correlation-based fiber Brillouin distributed sensing system using double lock-in amplifiers and a single-sideband (SSB) modulator. In our work, the lock-in detection is applied to both a probe and a pump waves at different frequencies to effectively remove the noise induced by the backward reflection of the pump waves, and the SSB modulator is used to purify the probe wave by suppressing the other first-order sideband component. A 300-m measurement range with a 20-cm spatial resolution is achieved successfully without any optical filter

Keywords

distributed sensors; fibre optic sensors; optical correlation; optical modulation; stimulated Brillouin scattering; 300 m; Brillouin distributed sensing system; Brillouin optical correlation domain analysis; backward reflection; correlation-based fiber sensing system; double lock-in amplifiers; first-order sideband component; lock-in detection; measurement range enlargement; single-sideband modulator; stimulated Brillouin scattering; Amplitude modulation; Optical amplifiers; Optical fiber amplifiers; Optical filters; Optical modulation; Optical pumping; Optical sensors; Probes; Semiconductor optical amplifiers; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Fiber Communication Conference, 2006 and the 2006 National Fiber Optic Engineers Conference. OFC 2006

Conference_Location

Anaheim, CA

Print_ISBN

1-55752-803-9

Type

conf

DOI

10.1109/OFC.2006.215682

Filename

1636713