[19p-Z06-1~12] 3.6 Ultrashort-pulse and high-intensity lasers

[19p-Z06-7] Fabrication of Er-doped microtoroid by the coating method

〇Riku Imamura¹, Keigo Nagashima¹, Shun Fujii², Hajime Kumazaki¹, Takasumi Tanabe¹ (1.Keio Univ., 2.Riken)

Keywords:microresonator, rare earth doped device, sol-gel method

The high Q factor of the microresonator enables the confinement of light to a small area and the enhancement of the interaction between light and matter inside the cavity. In this study, we fabricated a low-threshold microlaser by doping erbium ions to a microcavity. In addition, we propose a new method of fabricating a high-gain toroidal cavity by enlarging its diameter compared to the conventional erbium-doped microtoroid.