Influence of laser linewidth on spectral ripple in fold-type cavity ring-down measurement

Zhongqi Tan; Suyong Wu; Xingwu Long; Wenjian Wei

doi:10.1117/12.2073362

19 November 2014 Influence of laser linewidth on spectral ripple in fold-type cavity ring-down measurement

Zhongqi Tan, Suyong Wu, Xingwu Long, Wenjian Wei

Proceedings Volume 9274, Advanced Sensor Systems and Applications VI; 92741X (2014) https://doi.org/10.1117/12.2073362
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

So-called spectral ripple a special phenomenon only existing in fold-type cavity ring-down spectrometer, and it is believed as deriving from the interference effect of different lights on the folded mirror. To investigate the influence of this phenomenon, on fold-type cavity ring-down measurement, some representative instances of laser linewidth are simulated and analyzed, and some experiments are carried on. It is found that the increasing of laser linewidth can make the amplitude of the spectral ripple decrease, more importantly, which can make the ring-down signal no longer decay as a single exponential but as the double exponential function.

Citation Download Citation

Zhongqi Tan, Suyong Wu, Xingwu Long, and Wenjian Wei "Influence of laser linewidth on spectral ripple in fold-type cavity ring-down measurement", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92741X (19 November 2014); https://doi.org/10.1117/12.2073362

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