摘要
Whispering-gallery-mode microcavity lasers possess remarkable characteristics such as high Q factors and compact geometries,making them an essential element in the evolution of microlasers.However,solid-state whispering-gallery-mode lasers have previously suffered from low output power and limited optical conversion efficiency,hindering their applications.Here,we present the achievement of milliwatt laser emissions at a wavelength of 1.06µm from a solid-state whispering-gallery-mode laser.To accomplish this,we construct a whispering-gallery-mode microcavity(with a diameter of 30µm)using a crystalline Nd:YAG thin film obtained through carbon-implantation enhanced etching of a Nd:YAG crystal.This microcavity laser demonstrates a maximum output power of 1.12 mW and an optical conversion efficiency of 12.4%.Moreover,our unique eccentric microcavity design enables efficient coupling of free-space pump light,facilitating integration with a waveguide.This integration allowed for single-wavelength laser emission from the waveguide,achieving an output power of 0.5 mW and an optical conversion efficiency of 6.18%.Our work opens up new possibilities for advancing solid-state whispering-gallery-mode lasers,providing a viable option for compact photonic sources.
基金
supported by the National Natural Science Foundation of China(No.12122508).
