title: All-optical thermal microscopy of laser-excited waveguides.
abstract: We report on a unique combination of high-resolution confocal microscopy and ratiometric luminescence thermometry to obtain thermal images of 800 nm pumped ultrafast laser-inscribed waveguides in a Nd:YAG crystal. Thermal images evidence a strong localization of thermal load in the waveguide active volume. Comparison between experimental data and numerical simulations reveals that ultrafast laser-inscribed damage tracks in Nd:YAG crystals behave both as low-index and low-thermal conductivity barriers.
authors.forename: Ruiyun
authors.initials: R
authors.lastname: He
authors.forename: Javier Rodríguez
authors.initials: JR
authors.lastname: Vázquez de Aldana
authors.forename: Ginés Lifante
authors.initials: GL
authors.lastname: Pedrola
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Daniel
authors.initials: D
authors.lastname: Jaque