Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser micromachining
Lin, Jintian · Xu, Yingxin · Fang, Zhiwei · Song, Jiangxin · Wang, Nengwen · Qiao, Lingling · Fang, Wei · Cheng, Ya
الأصل · EN
We report on fabrication of high Q lithium niobate (LN) whispering-gallery-mode (WGM) microresonators suspended on silica pedestals by femtosecond laser microfabrication. The micrometer-scale (diameter 82 μm) LN resonator possesses a Q factor of 2.5x10⁵ around 1550 nm wavelength range. Moreover, second harmonic generation with a continuous-wave tunable single-longitudinal-mode pump laser in the on-chip LN microresonator is demonstrated in the on-chip LN microresonator. A fiber taper is employed to couple the pump laser into the microresonator, showing a normalized conversion efficiency of 1.35x10-5/mW.
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