Title :
Airborne multi-gas sensor
Author :
Ediger, Marwood N. ; Vakhtin, Andrei B. ; Bomse, David S.
Author_Institution :
Mesa Photonics, LLC, Santa Fe, NM, USA
Abstract :
A multi-gas sensing technique based upon two-tone, frequency modulation spectroscopy (TT-FMS) intended for use on a variety of airborne platforms is demonstrated. TT-FMS enables sensitivity comparable to cavity-enhanced methods but with significant advantages in robustness, reliability, power consumption, cost and weight. Multiplexing of TT-FMS provides simultaneous, real-time measurement of carbon dioxide and methane using a single optical path and detector. With standard telecommunication laser diodes used as light sources, the measurement precision of 1-2 × 10-6 Hz-1/2 is demonstrated.
Keywords :
carbon compounds; frequency modulation; gas sensors; light sources; measurement by laser beam; multiplexing; optical modulation; optical sensors; organic compounds; photodetectors; CO2; TT-FMS multiplexing; airborne multigas sensor; cavity-enhanced methods; light sources; optical path; photodetector; real-time carbon dioxide measurement; real-time methane measurement; telecommunication laser diodes; two-tone-frequency modulation spectroscopy multiplexing; Absorption; Amplitude modulation; Atmospheric measurements; Frequency modulation; Optical fibers; Optical modulation;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2015 Conference on
Conference_Location :
San Jose, CA
