title: Diode-pumped 214.8-nm Nd:YAG /Cr4+:YAG microchip laser system for the detection of NO.
abstract: A passively Q-switched 214.8-nm Nd:YAG/Cr(4+):YAG microchip laser system for the detection of NO was designed, constructed, and tested. The system uses the fifth harmonic of the 1.074-microm transition in Nd:YAG to detect NO by laser-induced fluorescence. A significant challenge was the development of an environmentally stable coating to provide the necessary discrimination between the 1.074-microm laser line and the stronger transition at 1.064 microm. The exact position of the fifth-harmonic frequency was determined by use of NO fluorescence excitation spectra to be 46556 +/- 1.5 cm(-1). With a pulse energy of approximately 50 nJ of fifth-harmonic light, we observed a detection sensitivity for NO of approximately 15 parts per billion by volume in a simple, compact optical system.
authors: Center for Materials Technology, Aerodyne Research, Incorporated, 45 Manning Road, Billerica, Massachusetts 01821-3976, USA. jody@aerodyne.com
authors: J
authors: J
authors: Wormhoudt
authors: J H
authors: JH
authors: Shorter
authors: C C
authors: CC
authors: Cook
authors: J J
authors: JJ
authors: Zayhowski