Improving the accuracy in cavity ring-down fiber amplified loop gas sensing system by using digital signal processing technique

N. Ni; C. C. Chan

doi:10.1117/12.631290

5 November 2005 Improving the accuracy in cavity ring-down fiber amplified loop gas sensing system by using digital signal processing technique

N. Ni, C. C. Chan

Author Affiliations +

Proceedings Volume 5998, Sensors for Harsh Environments II; 59980C (2005) https://doi.org/10.1117/12.631290
Event: Optics East 2005, 2005, Boston, MA, United States

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.

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N. Ni and C. C. Chan "Improving the accuracy in cavity ring-down fiber amplified loop gas sensing system by using digital signal processing technique", Proc. SPIE 5998, Sensors for Harsh Environments II, 59980C (5 November 2005); https://doi.org/10.1117/12.631290

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