Abstract
In several industrial processes there is a growing demand for a fast and sensitive detection of HCl, in order to reduce the pollution due to that molecule. We realized a compact spectrometer based on distributed feed-back (DFB) diode laser, which adopts a two-tone frequency modulation technique, for reaching a detection limit of few ppb. This technique moves the demodulation frequency in a region where the laser excess noise can be reduced to a lower level (10 MHz - 1 GHz).
© 1998 IEEE
PDF ArticleMore Like This
Julien Cousin, Weidong Chen, Damien Bigour, Samir Kassi, and Daniele Romanini
JMA43 Biomedical Optics (BIOMED) 2008
Yufei Ma, Yao Tong, Ying He, Xin Yu, and Frank K. Tittel
JW2A.177 CLEO: Applications and Technology (CLEO:A&T) 2018
F. K. Tittel, A. A. Kosterev, R. F. Curl, C. Gmachl, F. Capasso, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, and A. Y. Cho
WC15 Advanced Solid State Lasers (ASSL) 2000