title: Spectrometer system for studying absorption from excited metastable states of ions in crystals.
abstract: A spectrometer system for studying excited state absorption of ions in crystals is described. Pulsed xenon short arc lamps and keyed photomultipliers are used to measure the transmission after optically pumping the ions into an excited state. A wide dynamic range of absorption coefficients of excited states with lifetimes down to less than 100 microsec can be measured. A repeatability near the shot noise limit is obtained.
authors.affiliation: Department of Physics, The Johns HopkinsUniversity, Baltimore, Maryland 21218, USA.
authors.forename: H W
authors.initials: HW
authors.lastname: Moos
authors.forename: C B
authors.initials: CB
authors.lastname: Opal
authors.forename: J W
authors.initials: JW
authors.lastname: Huang