Ultra-compact and low-threshold thulium microcavity laser monolithically integrated on silicon

作者：Su Zhan; Li Nanxi; Magden E Salih; Byrd Matthew; Purnawirman; Adam Thomas N; Leake Gerald; Coolbaugh Douglas; Bradley Jonathan D B; Watts Michael R

来源：Optics Letters, 2016, 41(24): 5708-5711.

DOI：10.1364/OL.41.005708

We demonstrate an ultra-compact and low-threshold thulium microcavity laser that is monolithically integrated on a silicon chip. The integrated microlaser consists of an active thulium-doped aluminum oxide microcavity beside a passive silicon nitride bus waveguide, which enables on-chip pump-input and laser-output coupling. We observe lasing in the wavelength range of 1.8-1.9 mu m under 1.6 mu m resonant pumping and at varying waveguide-microcavity gap sizes. The microlaser exhibits a threshold as low as 773 mu W (226 mu W) and a slope efficiency as high as 24% (48%) with respect to the pump power coupled into the silicon nitride bus waveguide (microcavity). Its small footprint, minimal energy consumption, high efficiency, and silicon compatibility demonstrate that on-chip thulium lasers are promising light sources for silicon microphotonic systems.

• 出版日期2016-12-15
• 单位MIT