Sensors | |
Immunity to Laser Power Variation in a DFB Diode Laser Based Optical Gas Sensor Using a Division Process | |
Hengtai Chang2  Jun Chang1  Qingjie Huang2  Qiang Wang2  Changbin Tian2  Wei Wei2  Yuanyuan Liu2  | |
[1] School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Jinan 250100, China; | |
关键词: optical gas sensor; division process; residual amplitude modulation; wavelength modulation spectroscopy; unstable laser power; | |
DOI : 10.3390/s150409582 | |
来源: mdpi | |
【 摘 要 】
The division process used in a DFB diode laser-based optical gas sensor was studied to improve the immunity to laser power variation. Residual amplitude modulation (RAM) in wavelength modulation spectroscopy (WMS) detection was eliminated by intensity normalization using a division process. As a result the detected harmonic signals showed a significant improvement in line shape. For the first harmonic (1
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
【 预 览 】
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RO202003190013554ZK.pdf | 871KB | download |