Fluoride microresonators for mid-IR applications

Abstract

We study crystalline fluoride microresonators for mid-infrared applications. Whispering gallery mode resonators were fabricated with BaF${}_2$, CaF${}_2$ and MgF${}_2$ crystals. The quality factors were measured at wavelengths of 1.56 μm and 4.58 μm. The impacts of fabrication technique, impurities, multiphonon absorption and surface water are investigated. It is found that MgF2 resonators have room temperature Q factor of $8.3\times 10^6$ at wavelength of 4.58 μm, limited by multiphonon absorption.

4 pages, 5 figures

References in corpus (3)

• Tunable frequency combs based on dual microring resonators
• Generation of Kerr combs centered at 4.5μm in crystalline microresonators pumped by quantum cascade lasers
• On the dispersion management of fluorite whispering-gallery mode resonators for Kerr optical frequency comb generation in the telecom and mid-infrared range

Cited by in corpus (6)

• Nonlinear and Quantum Optics with Whispering Gallery Resonators
• Octave-spanning tunable parametric oscillation in crystalline Kerr microresonators
• Mid-Infrared ultra-high-Q resonators based on fluoride crystalline materials
• Dissipative Kerr solitons and Cherenkov radiation in optical microresonators with third order dispersion
• High-Q longwave infrared microresonators based on a non-epitaxial germanium platform
• Multispectral Kerr frequency comb initiated by Faraday ripples