Quantum cascade laser sensors for online gas chromatography

Authors :: Sheng Wu
Yongchun Tang
Andrei Deev
Razeghi, Manijeh
Sudharsanan, Rengarajan
Brown, Gail J.
Source :: Quantum Sensing and Nanophotonic Devices VIII.
Publication Year :: 2011
Publisher :: SPIE, 2011.
Abstract: We show that QC laser could improve capillary Gas Chromatography Infrared spectroscopy resolution significantly, i.e. both Doppler limited and Doppler free resolution could be achieved. To achieve these goals, we report our latest efforts in characterizing the tuning and noise properties of Quantum Cascade (QC) lasers; novel schemes on modulation to gain largest tuning range as well as on stabilizing and locking the QC lasers are proposed, and results presented.