Quasi-Distributed Absorption Sensing System Based on a Coherent Multiplexing Technique

Author

Guan, Zu-Guang ; Zhou, Bin ; Liu, Guorong ; He, Sailing

Author_Institution

Centre for Opt. & Electromagn. Res., Zhejiang Univ., Hangzhou

Volume

19

Issue

10

fYear

2007

fDate

5/15/2007 12:00:00 AM

Firstpage

792

Lastpage

794

Abstract

A coherence multiplexing scheme for quasi-distributed absorption sensors is introduced. The sensing units are designed with different optical path lengths, and the signals from the inline sensing array can be demultiplexed by a path-scanning Michelson interferometer. Intracavity absorbance in each unit can be deduced from the corresponding signal and the signals of the previous sensing units

Keywords

Michelson interferometers; chemical sensors; chemical variables measurement; distributed sensors; fibre optic sensors; light coherence; multiplexing; Michelson interferometer; coherent multiplexing; intracavity absorbance; quasidistributed absorption sensing system; sensing array; Absorption; Coherence; Delay; Frequency modulation; Optical arrays; Optical fiber sensors; Optical interferometry; Optical network units; Optical sensors; Pollution measurement; Absorbance measurement; coherence multiplexing technique; quasi-distributed absorption sensing system;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.896583

Filename

4162565