Spectroscopy and Spectral Analysis, Volume. 31, Issue 8, 2040(2011)
Research on Trace Gas Spectral Measurement on Intra-Cavity Fiber Optic Laser
Due to the advantages of immunity of electrical/electronic, high performance cost ratio, remote detection and multiplexing capability, intra-cavity fiber optic gas measurement has aroused wide concern. The trace gas measurement system has been developed based on the elaborated gas cell and reflector. The wavelength sweeping technique (WST) is realized when the Fabry-Perot type tunable optical filter is applied by the sawtooth driver voltage. Multi absorption lines can be obtained and one scanning measurement with WST is equal to multiple independent detections, so the gas measurement sensitivity is improved remarkably. The experimental results show that the acetylene detection sensitivity is reduced to less than 100 ppm and the relative measurement error is less than 3% of practical gas concentration.
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ZHANG Hong-xia, LIU Kun, JIA Da-gong, LIU Tie-gen, PENG Gang-ding, WANG Yan, ZHANG Yi-mo. Research on Trace Gas Spectral Measurement on Intra-Cavity Fiber Optic Laser[J]. Spectroscopy and Spectral Analysis, 2011, 31(8): 2040
Received: Sep. 15, 2010
Accepted: --
Published Online: Aug. 29, 2011
The Author Email: Hong-xia ZHANG (hxzhang@tju.edu.cn)