Tuning Characteristics of DFB Diode Laser and its Application to TDLAS Gas Sensor Design

Rong Jun Lu; De Ming Shen; Qian Qian Du; Bao Zhen Huang; Jian Shu Shi

doi:10.4028/www.scientific.net/AMM.511-512.173

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 511-512Tuning Characteristics of DFB Diode Laser and its...

Tuning Characteristics of DFB Diode Laser and its Application to TDLAS Gas Sensor Design

Abstract:

Static and dynamic tuning characteristics of Distribute Feedback (DFB) diode lasers are investigated with practical laser devices. These characteristics are the basic guidelines for practical TDLAS sensors design. Static tuning characteristics help to select suitable diode lasers from limited available laser devices with specific wavelength and to set an appropriate working current and temperature. Dynamic tuning characteristics decide the sweep speed of current slope in both direct absorb Spectroscopy (DAS) and wavelength modulation Spectroscopy (WMS). Because of nonlinearity in the relation between wavelength and tuning current, the measured spectral line position should be corrected by the dynamic characteristics. For WMS, current tuning efficient and IM/AM (Intense modulation/Amplitude modulation) differential phase could be utilized to optimize laser modulation and harmonic components demodulation.

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Periodical:

Applied Mechanics and Materials (Volumes 511-512)

Pages:

173-177

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.511-512.173

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Online since:

February 2014

Authors:

Rong Jun Lu, De Ming Shen, Qian Qian Du, Bao Zhen Huang, Jian Shu Shi

Keywords:

Gas Sensor, Tunable Diode Laser, Tunable Diode Laser Absorption Spectroscopy (TDLAS), Tuning Characteristics

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