Title :
Modulation cancellation method for detection of molecules with unresolved absorption bands
Author :
Kosterev, Anatoliy A. ; Thomazy, David ; Dong, Lei ; Tittel, Frank K. ; Spagnolo, Vincenzo
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA
Abstract :
A novel spectroscopic technique was applied to detection of hydrazine vapor using two wide stripe diode lasers and a variation of QEPAS. Modulating lasers with 180 degrees phase shift resulted in >100 times background reduction.
Keywords :
Absorption; Chemical lasers; Gas lasers; Laser tuning; Optical modulation; Optical sensors; Propellants; Semiconductor lasers; Spectroscopy; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics (CLEO) and Quantum Electronics and Laser Science Conference (QELS), 2010 Conference on
Conference_Location :
San Jose, CA, USA
Print_ISBN :
978-1-55752-890-2
Electronic_ISBN :
978-1-55752-890-2
