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Wavelength Sweep of Intracavity Fiber Laser for Low Concentration Gas Detection

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9 Author(s)
Kun Liu ; Coll. of Precision Instrum. & Opto-Electron. Eng., Tianjin Univ., Tianjin ; Wencai Jing ; Gangding Peng ; Jianzhong Zhang
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Wavelength sweep technique (WST) is introduced into intracavity fiber laser (ICFL) for low concentration gas detection. The limitation induced by noise can be eliminated using this method, and the performance of the system is improved. The sensitivity of the system is reduced to less than 200 ppm. With WST, the sweeping characteristic of the ICFL can be described according to known gas absorption spectra.

Published in:

IEEE Photonics Technology Letters  (Volume:20 ,  Issue: 18 )