8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-393-C7-396
Absolute non-radiative energy conversion efficiency spectra in Ti3+ : Al 2O 3crystals measured by non-contact quadrature photopyroelectric spectroscopyA. Mandelis, J. Vanniasinkam and S. Buddhudu
Photothermal and Optoelectronic Diagnostics Laboratory Department of Mechanical Engineering, University of Toronto, Toronto, Canada, M5S 1A4
Photopyroelectric spectroscopy (PPES) was used in a novel non-contact experimental configuration to obtain, for the first time, high-resolution absolute spectra of the optical-to-thermal energy conversion efficiency (non-radiative coefficient), ηNR(λ), of Ti : Sapphire laser crystals with widely different figures of merit. These spectra were found to depend on the optical quality of the bulk and of the polished surfaces of the Ti : Sapphire material.
© EDP Sciences 1994