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Proceedings Paper

Improving the accuracy in cavity ring-down fiber amplified loop gas sensing system by using digital signal processing technique
Author(s): N. Ni; C. C. Chan
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Paper Abstract

The mathematical model of a cavity ring-down (CRD) fiber amplified loop gas sensing system is initially proposed. A digital least mean square (LMS) adaptive filter is designed to remove an amplified spontaneous emission (ASE) noise induced by an erbium doped fiber amplifier (EDFA) effectively. The simulation results show that the minimum measurement concentration of 18ppm is obtained.

Paper Details

Date Published: 5 November 2005
PDF: 8 pages
Proc. SPIE 5998, Sensors for Harsh Environments II, 59980C (5 November 2005); doi: 10.1117/12.631290
Show Author Affiliations
N. Ni, Nanyang Technological Univ. (Singapore)
C. C. Chan, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 5998:
Sensors for Harsh Environments II
Anbo Wang, Editor(s)

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