Wang Pengfei, Yi Yating, Wang Xin, Li Angzhen, Jia Shijie, Fan Yaxian, Brambilla Gilberto, Wang Shunbin, Zhao Haiyan
Opt Lett. 2020 Jul 1;45(13):3553-3556. doi: 10.1364/OL.396843.
In this Letter, we report lasing at 2.3 µm in Tm-single-doped and Tm/Ho-codoped fluorotellurite glass microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.9 and 2.3 µm and triple-wavelength lasing at 1.9, 2.07, and 2.3 µm are achieved in Tm-doped and Tm/Ho-codoped microspheres, respectively. The introduction of Ho ions significantly reduces the lasing threshold of Tm at 2.3 µm because of energy transfer.
在本信函中，我们报道了在掺铥单掺杂和铥/钬共掺杂氟碲酸盐玻璃微球谐振器中实现了2.3μm的激光发射。通过使用793nm二极管激光器作为泵浦源，并利用回音壁模式微谐振器（WGMRs），在掺铥和铥/钬共掺杂的微球中分别实现了1.9μm和2.3μm的双波长激光发射以及1.9μm、2.07μm和2.3μm的三波长激光发射。由于能量转移，钬离子的引入显著降低了铥在2.3μm处的激光发射阈值。
