Design of the Constant Current Driver Circuit for VCSEL Used in Situ Measurement of Industrial Gases

Abstract

Abstract:

The constant current driver circuit is designed for vertical cavity surface emitting laser (VCSEL), which is used for online measurement of industrial gases. The structure and the operation principle of the constant current driver circuit are described. The circuit with delay and modulation function can drive the VCSEL safely and reliably. The VCSEL combined with tunable diode laser absorption spectroscopy (TDLAS) technique are used to measure different concentrations of oxygen. The ideal test fitting coefficient proved that the driver circuit is reliable for the VCSEL to control output wavelength. So the constant current driver circuit has potential for industrial gas monitoring actually.

Key words: vertical cavity surface emitting laser, constant current driver circuit, delaying circuit, tunable diode laser absorption spectroscopy

CLC Number:

TN402

TIAN Ming-Li, TU Guo-Jie, WANG Yu, PANG Tao, ZHANG Zhi-Rong, WU Bian, XIA Hua, DONG Feng-Zhong. Design of the Constant Current Driver Circuit for VCSEL Used in Situ Measurement of Industrial Gases[J]. Journal of Atmospheric and Environmental Optics, 2012, (4): 310-.

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