10 February 2017 Laser absorption spectroscopy based on a broadband external cavity quantum cascade laser
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Proceedings Volume 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016); 102501X (2017) https://doi.org/10.1117/12.2266830
Event: Fourth International Conference on Optical and Photonics Engineering, 2016, Chengdu, China
Abstract
A tunable diode laser absorption spectroscopy (TDLAS) system based on a broad band external cavity quantum cascade laser (ECQCL) near 7.78 μm was used to study volatile organic compounds (VOCs) measurements. Instead of using a standard infrared mercury cadmium telluride (MCT) detector, a quartz crystal tuning fork (QCTF) as a light detector was successfully used for laser signal detection. Fast Fourier transform (FFT) was used to extract vibration intensity information of QCTF. Primary results indicate that the new developed system has a good reproducibility, and a good agreement was obtained by comparing with data taken from standard spectroscopic database.
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Juan Sun, Ningwu Liu, Hao Deng, Junya Ding, Jiancha Sun, Lei Zhang, Jingsong Li, "Laser absorption spectroscopy based on a broadband external cavity quantum cascade laser", Proc. SPIE 10250, International Conference on Optical and Photonics Engineering (icOPEN 2016), 102501X (10 February 2017); doi: 10.1117/12.2266830; https://doi.org/10.1117/12.2266830
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