AI Article Synopsis
- Hollow-core fibers (HCFs) have great potential for light guidance due to their promise of low loss, but face challenges in achieving single-moded operation without sacrificing performance.
- This paper presents a novel approach called Perturbed Resonance for Improved Single Modedness (PRISM), which effectively eliminates unwanted modes in the fiber, resulting in a fundamental-mode loss of 7.5 dB/km compared to over 3000 dB/km for other modes.
- The successful implementation of PRISM not only shows significant improvements in single-modedness over previous designs but also paves the way for enhanced low-loss performance in hollow-core fibers.
Article Abstract
Hollow-core fibers (HCFs) are a revolution in light guidance with enormous potential. They promise lower loss than any other waveguide, but have not yet achieved this potential because of a tradeoff between loss and single-moded operation. This paper demonstrates progress on a strategy to beat this tradeoff: we measure the first hollow-core fiber employing Perturbed Resonance for Improved Single Modedness (PRISM), where unwanted modes are robustly stripped away. The fiber has fundamental-mode loss of 7.5 dB/km, while other modes of the 19-lattice-cell core see loss >3000 dB/km. This level of single-modedness is far better than previous 19-cell or 7-cell HCFs, and even comparable to some commercial solid-core fibers. Modeling indicates this measured loss can be improved. By breaking the connection between core size and single-modedness, this first PRISM demonstration opens a new path towards achieving the low-loss potential of HCFs.
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| http://dx.doi.org/10.1364/OE.21.006233 | DOI Listing |
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