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Ultra-low-loss nanofiber Fabry-Perot cavities optimized for cavity quantum electrodynamics
Optics Letters
|September 2, 2020
Summary
We created ultra-low-loss fiber optic cavities for quantum technology. These high-finesse nanofiber cavities improve quantum network scalability and fidelity.
Area of Science:
- Quantum optics
- Nanophotonics
- Fiber optics
Background:
- Cavity quantum electrodynamics (CQED) requires high-quality optical cavities to enhance light-matter interactions.
- All-fiber cavities offer robust and scalable platforms for quantum information processing.
Purpose of the Study:
- To fabricate ultra-low-loss, all-fiber Fabry-Perot cavities with an integrated nanofiber section.
- To optimize these cavities for cavity quantum electrodynamics (CQED) applications.
- To assess the potential for scalable quantum networks.
Main Methods:
- Fabrication of a nanofiber section between two fiber Bragg gratings.
- Continuous monitoring of cavity finesse and fiber radius during fabrication.
- Precise evaluation of taper transmission as a function of fiber radius.
Main Results:
- Achieved ultra-low internal round-trip loss of 0.31% at a nanofiber waist radius of 207 nm.
- Obtained a total cavity finesse of 1380.
- Predicted a maximum internal cooperativity of ~1050 for a cesium atom on the nanofiber surface.
Conclusions:
- Demonstrated a novel method for fabricating high-finesse nanofiber cavities.
- The developed cavities show great promise for advancing cavity quantum electrodynamics.
- This technology could enable the development of high-fidelity, scalable quantum networks.
