Nanofiber Fabry-Perot microresonator for nonlinear optics and cavity quantum electrodynamics

Area of Science:

• Optics and Photonics
• Quantum Physics

Background:

• Optical microresonators are crucial for applications in nonlinear optics and quantum electrodynamics.
• Fabry-Perot resonators offer high spectral resolution but often face challenges in fabrication and integration.

Purpose of the Study:

• To experimentally realize a compact Fabry-Perot-type optical microresonator.
• To achieve high finesse and transmission characteristics suitable for strong coupling regimes.
• To demonstrate a versatile platform for advanced optical experiments.

Main Methods:

• Fabrication of a tapered optical fiber with a subwavelength diameter waist.
• Integration of two fiber Bragg gratings to form the microresonator cavity.
• Characterization of the resonator's optical properties near the cesium D2 line.

Main Results:

• Achieved a finesse (F) of 86 and on-resonance transmission (T) of 11%.
• Demonstrated very low taper losses, contributing to high resonator performance.
• The resonator's mode geometry is advantageous for various applications.

Conclusions:

• The realized optical microresonator meets the stringent requirements for nonlinear optics and cavity quantum electrodynamics.
• The demonstrated ease of use and favorable mode characteristics enable a wide range of potential applications.
• This work provides a promising platform for exploring strong coupling phenomena.