Abstract

We present our results on an experimental and theoretical investigation into a glass microsphere laser emitting at 2 μm wavelength. First, we fabricated Ho³⁺-doped tellurite glass fiber and measured the absorption and emission spectra, and the fluorescence lifetime. Using this fiber, a tellurite glass microsphere with a Q-factor of 2 × 10⁶ was also prepared, and a single-mode laser output with a low threshold of 342 μW was observed using a 1150 nm laser as the pump source. The dynamic characteristics of the microsphere laser were studied theoretically by considering rare-earth ion spectroscopy, the rate equation of the rare-earth energy level, and the light-matter interactions in the microsphere. This work can be used to study laser emissions with low thresholds in rare-earth doped compound glass microresonators for a wide range of applications, such as gas sensing, integrated photonics, and medical surgery.

Tm³⁺-Ho³⁺ codoped tellurite glass microsphere laser in the 1.47 μm wavelength region

Angzhen Li, Wenhao Li, Meng Zhang, Yindong Zhang, Shunbin Wang, Anping Yang, Zhiyong Yang, Elfed Lewis, Gilberto Brambilla, and Pengfei Wang
Opt. Lett. 44(3) 511-513 (2019)

Low-threshold lasing at 1975  nm in thulium-doped tellurite glass microspheres

Francis Vanier, François Côté, Mohammed El Amraoui, Younès Messaddeq, Yves-Alain Peter, and Martin Rochette
Opt. Lett. 40(22) 5227-5230 (2015)

Low-threshold stimulated Brillouin scattering in high-Q whispering gallery mode tellurite microspheres

Changlei Guo, Kaijun Che, Pan Zhang, Jinshu Wu, Yantang Huang, Huiying Xu, and Zhiping Cai
Opt. Express 23(25) 32261-32266 (2015)

Effect of Tm³⁺ concentration on the emission wavelength shift in Tm³⁺-doped silica microsphere lasers

Angzhen Li, Jiquan Zhang, Meng Zhang, Wenhao Li, Shunbin Wang, Elfed Lewis, Gilberto Brambilla, and Pengfei Wang
Opt. Lett. 43(18) 4325-4328 (2018)

2 μm laser oscillation of Ho³⁺:Tm³⁺-codoped silica microspheres

Longxiang Peng, Yantang Huang, Yafan Duan, Shijian Zhuang, Tingdi Liao, and Canhua Xu
Appl. Opt. 56(26) 7469-7473 (2017)