Tm:Y2SiO5 and Tm:SrY4(SiO4)3O microchip lasers

摘要

Abstract: Laser operation in the 2 $mu@m-wavelength range is reported. Two different crystals are studied: Y$-2$/SiO$-5$/ and SrY$-4$/(SiO$-4$/)$-3$/O doped with 5% thulium. Microchip lasers with flat/flat monolithic cavity are operated at room temperature, with Ti:Sapphire laser pumping. Threshold as low as 130 mw of incident pump power and slope efficiency as high as 46% were obtained. The emission spectrum of such microchip lasers appears to be very wide (20 to 30 nm). Laser experiments with laser diode pumping are also reported.!5