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Wavelength modulation detection of water vapor with a vertical cavity surface-emitting laser

机译:垂直腔面发射激光器对水蒸气的波长调制检测

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A vertical cavity surface-emitting laser was studied for gas-sensing applications. Properties of the 962-nm laser that were measured include side-mode suppression, wavelength tuning with temperature and current, power versus injection current, and the amplitude noise spectrum. With wavelength modulation spectroscopy, a rms noise level of 2 x 10(-4) absorbance units was achieved. The large current tuning range (25 cm(-1)) and smaller amplitude modulation (11%/cm(-1)) of the vertical cavity laser compare favorably with Fabry-Perot and distributed feedback diode lasers for spectroscopic gas sensing, especially at atmospheric pressure. (C) 1997 Optical Society of America.
机译:研究了用于气体传感应用的垂直腔面发射激光器。所测量的962 nm激光器的属性包括侧模抑制,随温度和电流进行的波长调谐,功率与注入电流的关系以及幅度噪声频谱。使用波长调制光谱仪,均方根噪声电平达到2 x 10(-4)吸光度单位。垂直腔激光器的大电流调谐范围(25 cm(-1))和较小的振幅调制(11%/ cm(-1))与Fabry-Perot和分布式反馈二极管激光器相比更有利于光谱气体检测,尤其是在气压。 (C)1997年美国眼镜学会。

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