title: Spatially and temporally resolved temperature measurement in laser media.
abstract: A technique to measure the spatially resolved temperature distribution in a laser medium is presented. It is based on the temperature dependence of the absorption cross section close to the zero-phonon line of the active medium. Since other materials in the beam path exhibit a high (and constant) transmission at this wavelength, the method can easily be applied in realistic amplifier setups. The method was successfully tested on three different samples, which were pumped by a pulsed laser diode with up to 150 W average power: side-cooled Yb:YAG and Yb:fluoride-phosphate glass at room temperature and face-cooled Yb:CaF2at 120 K.
authors.forename: Jörg
authors.initials: J
authors.lastname: Körner
authors.forename: Fangxin
authors.initials: F
authors.lastname: Yue
authors.forename: Joachim
authors.initials: J
authors.lastname: Hein
authors.forename: Malte C
authors.initials: MC
authors.lastname: Kaluza