摘要
Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy （TDLAS） is developed, the laser used is a telecommunication near infrared distributed feed-back （DFB） tunable diode laser, combining with wavelength modulation spectroscopy technology, a detection limit of 20 ppm-m is demonstrated. Multi-channel detection is achieved by combining optical fiber technique. An on-board reference cell provides on-line sensor calibration and almost maintenance-free operation. The sensor is suitable for large area field H2S monitoring application.
Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy （TDLAS） is developed, the laser used is a telecommunication near infrared distributed feed-back （DFB） tunable diode laser, combining with wavelength modulation spectroscopy technology, a detection limit of 20 ppm-m is demonstrated. Multi-channel detection is achieved by combining optical fiber technique. An on-board reference cell provides on-line sensor calibration and almost maintenance-free operation. The sensor is suitable for large area field H2S monitoring application.
基金
This work was supported by the National Natural Science Foundation of China (No. 50534050)
the Funds of the Chinese Academy of Sciences for Key Topics in Innovation Engineering (No. KJCX2-SW-W27).
