A QEPAS-Based Central Wavelength Stabilized Diode Laser for Gas Sensing

A QEPAS-Based Central Wavelength Stabilized Diode Laser for Gas Sensing
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用于气体传感的基于 QEPAS 的中心波长稳定二极管激光器

DOI:
10.1109/lpt.2014.2384593
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发表时间:
2015-03
影响因子:
2.6
通讯作者:
Wang Rui
Wang Rui
中科院分区:
工程技术3区
文献类型:
--
作者:
Gong Ping;Xie Liang;Qi Xiao Qiong;Wang Rui

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报道了一种基于石英增强光声光谱的中心波长稳定分布反馈半导体激光器。使用石英音叉作为尖锐换能器来产生用于波长调谐和稳定的误差信号,而无需光电检测器,这有助于低成本、紧凑尺寸和免于环境声学噪声。由于二极管激光器的中心波长随驱动电流的变化而随时间变化,因此在不同的调制深度处获得快速的微调。因此,有效地提高了二极管激光器的波长稳定性。波长稳定的二极管激光器适用于基于吸收光谱的气体传感器。
A quartz-enhanced photoacoustic spectroscopy-based central wavelength stabilized distributed feedback diode laser is demonstrated in this letter. A quartz tuning fork is used as a sharp transducer to generate an error signal for wavelength tuning and stabilization without photodetector, which contributes to low cost, compact size, and freedom from ambient acoustic noises. The central wavelength of the diode laser obtains quickly fine-tuning at various modulation depths because it varies in time with the driving current. The wavelength stability of the diode laser is thus enhanced effectively. The wavelength stabilized diode laser is suited for absorption spectroscopy-based gas sensors.
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