Fabrication of dispersion engineered ultrahigh-Q crystalline optical microresonator for broad-bandwidth optical parametric oscillation

Shun Fujii; Koshiro Wada; Yasuhiro Kakinuma; Takasumi Tanabe

doi:10.1117/12.2579393

5 March 2021 Fabrication of dispersion engineered ultrahigh-Q crystalline optical microresonator for broad-bandwidth optical parametric oscillation

Shun Fujii, Koshiro Wada, Yasuhiro Kakinuma, Takasumi Tanabe

Author Affiliations +

Proceedings Volume 11672, Laser Resonators, Microresonators, and Beam Control XXIII; 1167209 (2021) https://doi.org/10.1117/12.2579393
Event: SPIE LASE, 2021, Online Only

Abstract

We demonstrate the all-precision-machining fabrication of ultrahigh-quality-factor (Q) crystalline optical microresonators. The obtained Q exceeds 100 million for both magnesium fluoride (MgF₂) and calcium fluoride (CaF₂) materials. This constitutes the highest Q factor obtained for whispering gallery mode crystalline microresonators fabricated solely by ultra-precision machining. We also achieve octave-wide optical parametric oscillation using an MgF₂ resonator fabricated with a computer-controlled machining process. This method readily enables advanced dispersion engineering for optical parametric oscillation and makes it possible to explore microcavity nonlinear optics and quantum optics without the need for skilled manual polishing techniques.

Conference Presentation

Citation Download Citation

Shun Fujii, Koshiro Wada, Yasuhiro Kakinuma, and Takasumi Tanabe "Fabrication of dispersion engineered ultrahigh-Q crystalline optical microresonator for broad-bandwidth optical parametric oscillation", Proc. SPIE 11672, Laser Resonators, Microresonators, and Beam Control XXIII, 1167209 (5 March 2021); https://doi.org/10.1117/12.2579393

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