Study on the Laser Characteristics for Calibration-Free Wavelength Modulation Spectroscopy

Abstract:

In this paper, a calibration-free wavelength modulation model via tunable diode laser absorption spectroscopy was setup. The laser modulation characteristics, modulation depth, linear modulation amplitude and frequency shift, were measured for the model setup. The experimental results show that modulation depth and the linear intensity modulation amplitude have well linear fitting to the scan voltage. Based on the laser parameters, the calibration-free model can be used to infer the gas temperature.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 982-987
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.982
• Online since: January 2013
• Authors: Guang Yu Wang, Jun Ling Song, Yan Ji Hong
• Keywords: Calibration-Free, Frequency Shift, Modulation Depth, Tunable Diode Laser, Wavelength Modulation Spectroscopy

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