Modulation Frequency Multiplexed Tunable Diode Laser Spectroscopy System for Simultaneous CO, CO<suB>2</suB> Measurements

Chin. Phys. Lett.

2006, Vol. 23

Issue (9): 2446-2449 DOI:

Original Articles

Modulation Frequency Multiplexed Tunable Diode Laser Spectroscopy System for Simultaneous CO, CO₂ Measurements

CHEN Dong;LIU Wen-Qing;ZHANG Yu-Jun;LIU Jian-Guo;WEI Qing-Nong;KAN Rui-Feng;WANG Min;CUI Yi-Ben;CHEN Jiu-Ying

Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031

Cite this article:

CHEN Dong, LIU Wen-Qing, ZHANG Yu-Jun et al 2006 Chin. Phys. Lett. 23 2446-2449

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Abstract A modulation frequency multiplexed dual diode-laser system is developed for simultaneous detection of the two most common fire gas products CO and CO₂. Simultaneous detection is achieved by modulating each laser at different frequencies, demodulating the signal by a pair of lock-in amplifiers for each gas. Laser beams are combined and detected by one detector after passing through an identical optical path. The experimental results show little performance degradation associated with modulation frequency multiplexing, and no cross-talk between the two multiplexed detection channels is measured.

Keywords: 42.55.Px 42.62.-b 71.35.Cc

Published: 01 September 2006

PACS:	42.55.Px	(Semiconductor lasers; laser diodes)
	42.62.-b	(Laser applications)
	71.35.Cc	(Intrinsic properties of excitons; optical absorption spectra)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I9/02446

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	CHEN Dong
	LIU Wen-Qing
	ZHANG Yu-Jun
	LIU Jian-Guo
	WEI Qing-Nong
	KAN Rui-Feng
	WANG Min
	CUI Yi-Ben
	CHEN Jiu-Ying

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