Title :
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
fDate :
5/15/2007 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.896583
