CO and CO2 spectroscopy using a 60 nm broadband tunable MEMS-VCSEL at approximately 1.55 microm.
The spectroscopic application of a new broadband microelectromechanical-system-tunable vertical cavity surface-emitting laser with single-mode coverage of 60 nm (245 cm(-1)) in a single, continuous sweep is described. The operation of the device is illustrated with high-resolution spectra of CO and CO2 over 110 cm(-1) (27 nm) and 67 cm(-1) (17 nm), respectively, with the CO band shown for high-pressure scans between 1 and 3 bars (0.1-0.3 MPa). The achieved tuning range opens up new opportunities for tunable diode laser absorption spectroscopy. The spectra were compared with HITRAN-derived model calculations. The benefits of a sensor based on this laser are greater speed, laser power, and tuning range.
Lackner
Maximilian
M
Institute of Chemical Engineering, Vienna University of Technology, Getreidemarkt, Wien, Austria. lackner@mail.zserv.tuwien.ac.at
Schwarzott
Michael
M
Winter
Franz
F
Kögel
Benjamin
B
Jatta
Sandro
S
Halbritter
Hubert
H
Meissner
Peter
P