High-temperature growth and spectroscopic characterization of Er,Yb:YAl3(BO3)4 epitaxial thin layers

Abstract We report the high-temperature growth, spectroscopic and passive waveguiding properties of crystalline Er,Yb:YAl 3 (BO 3 ) 4 films grown with LPE on undoped YAl 3 (BO 3 ) 4 substrates. The absorption and emission spectra and the fluorescence lifetimes have been measured. Multimode passive waveguiding has been observed in a 50-μm-thick Er,Yb:YAB film. The propagation losses have been measured to be 2 dB/cm.