Abstract
The optical interfacing between a free-space channel and single-photon detectors (SPDs) can greatly impact the inherent performance of a free-space quantum key distribution receiver. Direct coupling to detectors creates engineering challenges, and a single-mode fiber requires adaptive optics. Using a multimode fiber (MMF) is common; however, larger core diameters limit the achievable bandwidth. We demonstrate a prototype multimode fiber-based photonic lantern that allows us to retain the benefits of the large multimode coupling while transitioning to multiple, less multimodal fibers, reducing bandwidth limitation.
Original language | English |
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Pages (from-to) | 5252-5255 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 49 |
Issue number | 18 |
Early online date | 11 Sept 2024 |
DOIs | |
Publication status | Published - 15 Sept 2024 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics