Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Bulletin of the American Physical Society

Ultra-low-loss optical fiber cavities for applications in quantum information processing

Manuel Uphoff, Manuel Brekenfeld, Dominik Niemietz, Stephan Ritter, Gerhard Rempe

Published May 25, 2016• 0 citations
OpenAlex

Related papers

[INVITED] Ultrathin Optical Fiber Applications for Quantum Technologies

Síle Nic Chormaic

The Japan Society of Applied Physics•Jul 10, 2018•0 citations

Evaluation of ultra-low loss optical fiber connector loss for quantum components and applications

Jing Su, Dongxing He, Anouar Rahmouni +10 more

We present the characterization of low-loss, high-repeatability optical fiber-to-fiber connectors and show an average insertion loss of 0.39 ± 0.21% at 1550 nm and 0.94 ± 0.46% at 800 nm with excellent agreement between two independent laboratories.

•Jan 1, 2026•0 citations

Harnessing the mode mixing in optical fiber-tip cavities

Nina Podoliak, Hiroki Takahashi, Matthias Keller +1 more

Abstract We present a systematic numerical study of Fabry–Pérot optical cavities with Gaussian-shape mirrors formed between tips of optical fibers. Such cavities can be fabricated by laser machining of fiber tips and are promising systems for achieving strong coupling between atomic particles and an optical field as required for quantum information applications. Using a mode mixing matrix method, we analyze the cavity optical eigenmodes and corresponding losses depending on a range of cavity-shape parameters, such as mirror radius of curvature, indentation depth and cavity length. The Gaussian shape of the mirrors causes mixing of optical modes in the cavity. We investigate the effect of the mode mixing on the coherent atom-cavity coupling as well as the mode matching between the cavity and a single-mode optical fiber. While the mode mixing is associated with increased cavity losses, it can also lead to an enhancement of the local optical field. We demonstrate that around the resonance between the fundamental and 2nd order Laguerre–Gaussian modes of the cavity it is possible to obtain 50% enhancement of the atom-cavity coupling at the cavity center while still maintaining low cavity losses and high cavity-fiber optical coupling.

Journal of Physics B Atomic Molecular and Optical Physics•Mar 2, 2017•13 citations

Quantum noise suppression using optical fibers

Dmitry Levandovsky

•Dec 1, 1999•3 citations

Quantum key distribution integrating with ultra-high-power classical optical communications based on ultra-low-loss fiber

Jia-Qi Geng, Guan-Jie Fan-Yuan, Shuang Wang +6 more

The demand for the integration of quantum key distribution (QKD) and classical optical communication in the same optical fiber medium greatly increases as fiber resources and the flexibility of practical applications are taken into consideration. To satisfy the needs of the mass deployment of ultra-high power required for classical optical networks integrating QKD, we implement the discrete variable quantum key distribution (DV-QKD) under up to 25 dBm launch power from classical channels over 75 km on an ultra-low-loss (ULL) fiber by combining a finite-key security analysis method with the noise model of classical signals. To the best of our knowledge, this is the highest power launched by classical signals on the coexistence of DV-QKD and classical communication. The results exhibit the feasibility and tolerance of our QKD system for use in ultra-high-power classical communications.

Optics Letters•Nov 23, 2021•35 citations

Quantum effects in optical fibers

Leuchs, Marquardt

Optical Fiber Communication Conference•Jan 1, 2011•0 citations
Abstract We present a systematic numerical study of Fabry–Pérot optical cavities with Gaussian-shape mirrors formed between tips of optical fibers. Such cavities can be fabricated by laser machining of fiber tips and are promising systems for achieving strong coupling between atomic particles and an optical field as required for quantum information applications. Using a mode mixing matrix method, we analyze the cavity optical eigenmodes and corresponding losses depending on a range of cavity-shape parameters, such as mirror radius of curvature, indentation depth and cavity length. The Gaussian shape of the mirrors causes mixing of optical modes in the cavity. We investigate the effect of the mode mixing on the coherent atom-cavity coupling as well as the mode matching between the cavity and a single-mode optical fiber. While the mode mixing is associated with increased cavity losses, it can also lead to an enhancement of the local optical field. We demonstrate that around the resonance between the fundamental and 2nd order Laguerre–Gaussian modes of the cavity it is possible to obtain 50% enhancement of the atom-cavity coupling at the cavity center while still maintaining low cavity losses and high cavity-fiber optical coupling.
The demand for the integration of quantum key distribution (QKD) and classical optical communication in the same optical fiber medium greatly increases as fiber resources and the flexibility of practical applications are taken into consideration. To satisfy the needs of the mass deployment of ultra-high power required for classical optical networks integrating QKD, we implement the discrete variable quantum key distribution (DV-QKD) under up to 25 dBm launch power from classical channels over 75 km on an ultra-low-loss (ULL) fiber by combining a finite-key security analysis method with the noise model of classical signals. To the best of our knowledge, this is the highest power launched by classical signals on the coexistence of DV-QKD and classical communication. The results exhibit the feasibility and tolerance of our QKD system for use in ultra-high-power classical communications.