Spectroscopy and diode-pumped continuous-wave laser operation of Tm:Y2O3 transparent ceramic at cryogenic temperatures

Identifier:  imarina:6112271

Handle: https://hdl.handle.net/20.500.11797/imarina6112271

Authors:  Yue, Fangxin; Jambunathan, Venkatesan; Paul David, Samuel; Mateos, Xavier; Aguilo, Magdalena; Diaz, Francesc; Sulc, Jan; Lucianetti, Antonio; Mocek, Tomas

Abstract:
© 2020, The Author(s). We present the spectroscopic and laser characteristics of a 3 at.% Tm:Y2O3 transparent ceramic at cryogenic temperatures. An absorption cross section of 4.7 × 10−21 cm2 with a bandwidth of 0.7 nm centered at 793.3 nm and an emission cross section of 29.0 × 10−21 cm2 centered at 1930.9 nm were estimated at 80 K. Continuous-wave laser operation was achieved using broadband and VBG stabilized laser diodes emitting around 793 nm as pump sources. With the VBG pump diode, a maximum output power of 6.4 W was achieved at 80 K corresponding to a slope efficiency of 52.0% with respect to absorbed power.