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Low-loss, compact, fibre-integrated cell for quantum memories
Optics Express
|June 11, 2024
Summary
Researchers developed a compact hollow core optical fibre (HCF) cell for quantum technologies. This low-loss component integrates with single mode fibre (SMF), enabling applications in quantum memory and optical switching.
Area of Science:
- Photonics
- Quantum Technologies
- Optical Engineering
Background:
- Hollow core optical fibres (HCFs) are crucial for interfacing light and matter.
- Integrating HCFs with standard single mode fibres (SMFs) presents challenges in mode matching and loss reduction.
- Existing methods for HCF-SMF coupling can be complex and may not be robust.
Purpose of the Study:
- To develop a low-loss, compact HCF cell integrated with SMF for photonic quantum applications.
- To demonstrate efficient mode matching and minimize insertion loss at the SMF-HCF interface.
- To provide a durable and easily integrable component for quantum memory and optical switching.
Main Methods:
- Utilized graded index fibre for efficient mode matching between SMF and HCF.
- Applied anti-reflection coatings at the SMF-HCF interfaces to minimize optical loss.
- Developed a numerical modelling approach for interface characterization, avoiding finite element simulations.
- Encapsulated the HCF core within a support capillary for enhanced durability and integration.
Main Results:
- Achieved a low total insertion loss of 0.6(2) dB at 780 nm wavelength.
- Demonstrated efficient mode matching through graded index fibre coupling.
- Presented a validated numerical model for interface analysis.
- Successfully integrated the HCF cell with SMF using a support capillary.
Conclusions:
- The developed HCF cell offers a low-loss and compact solution for photonic quantum technologies.
- The integration method enhances durability and simplifies incorporation into existing fibre platforms.
- This component is suitable for advanced applications such as quantum memory and all-optical switching.
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