,Low threshold fiber taper coupled rare earth ion-doped chalcogenide microsphere laser

• 作 者: 李超然 戴世勋 张勤远 沈祥 王训四 张培晴 路来伟 吴越豪 吕社钦
• 机 构: Laboratory of Infrared Material and Devices, Advanced Technology Reasearch Institute, Ningbo Univers
• 出 处: Chinese Physics B
• 发表日期: 2015年04期
• 关键词: chalcogenide microspheres laser whispering gallery modes

We report the applications of a low-cost and environmentally friendly chalcogenide glass, 75 Ge S2-15Ga2S3-10 Cs I,in building active microsphere laser oscillators. A silica fiber taper is used as the coupling mechanism. With an 808-nm laser diode as a pump source, we show that a high-Q(～ 6×104) laser mode could be obtained from a 75-μm diameter microsphere that is coupled with a 1.77-μm waist-diameter fiber taper. The threshold of the incident pump power is1.39 m W, which is considerably lower than those of previously reported free-space coupled chalcogenide microsphere lasers. We also note an apparent enhancement in laser power generated from this chalcogenide microsphere laser.

We report the applications of a low-cost and environmentally friendly chalcogenide glass, 75 Ge S2-15Ga2S3-10 Cs I, in building active microsphere laser oscillators. A silica fiber taper is used as the coupling mechanism. With an 808-nm laser diode as a pump source, we show that a high-Q (~ 6 × 104) laser mode could be obtained from a 75-μm diameter microsphere that is coupled with a 1.77-μm waist-diameter fiber taper. The threshold of the incident pump power is 1.39 mW, which is considerably lower than those of previously previously reported free-space coupled chalcogenide microsphere lasers. We also note apparent enhancement in laser power generated from this chalcogenide microsphere laser.