Title :
Wavelength modulation technique for intra-cavity absorption gas sensor
Author :
Zhang, Min ; Wang, D.N. ; Jin, Wei ; Liao, Yanbiao
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
Wavelength modulation spectroscopy by the use of a tunable optical filter was applied to an intra-cavity fiber laser gas sensor. The optimum pump power and the modulation amplitude that maximized the signal-to-noise ratio were found. A minimum detectable gas (C2H2) concentration of 1000 ppm was experimentally achieved.
Keywords :
fibre lasers; gas sensors; modulation spectroscopy; optical filters; optical pumping; optical sensors; optical tuning; optimisation; organic compounds; ring lasers; ICAGS; acetylene; intra-cavity absorption gas sensors; intra-cavity fiber laser; minimum detectable gas concentration; modulation amplitude optimization; pump power optimization; ring fiber laser; tunable optical filter; wavelength modulation spectroscopy; Absorption; Amplitude modulation; Fiber lasers; Gas detectors; Gas lasers; Optical fiber sensors; Optical filters; Pump lasers; Spectroscopy; Tunable circuits and devices;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.822189
