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2022•Unpublished venueRequires access

High-Q WGM microresonators for mid-IR

Tatiana S. Tebeneva, Artem E. Shitikov, Oleg V. Benderov, Valery E. Lobanov, K. N. Min’kov, Igor A. Bilenko, Alexander V. Rodin

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Abstract

We upgraded the original fabrication method based on melting commercially available ZBLAN (heavy metal fluoride glass) optical fiber to obtain high-quality-factor ZBLAN microspheres with a diameter of 250 to 400 μm. The whispering gallery modes were excited in fabricated microresonators by different coupling elements and the high Q-factors at both 1.55 μm and 2.64 μm were demonstrated. At 1.5 μm the intrinsic Q-factor of (5.4 ± 0.4) · 108 determined by material losses was obtained. For 2.64 μm the quality factor was measured as (1.13 ± 0.22) · 108.

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What this paper is about

We upgraded the original fabrication method based on melting commercially available ZBLAN (heavy metal fluoride glass) optical fiber to obtain high-quality-factor ZBLAN microspheres with a diameter of 250 to 400 μm. The whispering gallery modes were excited in fabricated microresonators by different coupling elements and the high Q-factors at both 1.55 μm and 2.64 μm were demonstrated. At 1.5 μm the intrinsic Q-factor of (5.4 ± 0.4) · 108 determined by material losses was obtained. For 2.64 μm the quality factor was measured as (1.13 ± 0.22) · 108.

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Available abstract

We upgraded the original fabrication method based on melting commercially available ZBLAN (heavy metal fluoride glass) optical fiber to obtain high-quality-factor ZBLAN microspheres with a diameter of 250 to 400 μm. The whispering gallery modes were excited in fabricated microresonators by different coupling elements and the high Q-factors at both 1.55 μm and 2.64 μm were demonstrated. At 1.5 μm the intrinsic Q-factor of (5.4 ± 0.4) · 108 determined by material losses was obtained. For 2.64 μm the quality factor was measured as (1.13 ± 0.22) · 108.

Key concepts: ZBLAN, Q factor, Whispering-gallery wave, Materials science, Fabrication, Optical fiber, Fiber, Quality (philosophy)

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