Title :
High speed cavity ringdown spectroscopy by simultaneous laser and cavity tuning: towards O2 sensing in blow-down wind tunnels
Abstract :
We present a high speed cavity ringdown scheme involving simultaneous laser and cavity sweeping. By performing fast O2 measurements, we show that our system fulfils the requirements to analyze transient flows in hypersonic wind tunnels.
Keywords :
gas sensors; high-speed optical techniques; infrared spectroscopy; laser cavity resonators; laser tuning; measurement by laser beam; oxygen; spectrochemical analysis; wind tunnels; O2; blow-down wind tunnel; cavity sweeping; cavity tuning; high speed cavity ringdown spectroscopy; hypersonic wind tunnel; laser sweeping; laser tuning; oxygen sensing; transient flow; Chemical lasers; Frequency; Image motion analysis; Laser modes; Laser theory; Laser tuning; Lasers and electrooptics; Resonance; Ring lasers; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics, 2005. (CLEO). Conference on
Print_ISBN :
1-55752-795-4
DOI :
10.1109/CLEO.2005.202026