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[IEEE 2019 21st International Conference on Transparent Optical Networks (ICTON) - Angers, France (2019.7.9-2019.7.13)] 2019 21st International Conference on Transparent Optical Networks (ICTON) - How to Amplify Light in an Unfilled Hollow Core Optical Fiber
摘要： Optical amplification in a hollow core fiber is typically realised by filling the fiber with a gas and exploiting its active properties. In contrast, here we explore the theoretical possibility of achieving light amplification in an unfilled hollow core antiresonant fiber. In order to do so, we propose and discuss a hollow fiber design based on a combination of resonant and anti-resonant elements within the cladding area.
关键词： fiber properties,fiber design and fabrication,microstructured fibers
更新于2025-09-16 10:30:52
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[IEEE 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Fukuoka, Japan (2019.7.7-2019.7.11)] 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Multi-core Fiber Fabrication in Over-Cladding Bundled Rods Method Applying Polygonal Rods
摘要： The implementation of multi-core fiber fabrication using the over-cladding bundled rods method results in large core deformation. We have achieved core deformation of approximately 1%, on average, through a method applying hexagonal rods.
关键词： Fiber design and fabrication,Fibers for space division multiplexing
更新于2025-09-16 10:30:52
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Short-Wavelength, Near-Diffraction-Limited Beam, 792 nm Cladding Pumped Efficient Thulium-Doped Fiber Laser in a Power-Scalable Fiber Design
摘要： Thulium-doped fiber lasers (TDFLs) offer a broad 3F4 → 3H6 emission band ~1600-2200 nm. Thanks to “two-for-one” cross-relaxation process in TDFLs, that enables to achieve output power > 1 kW at ~2045 nm with 0.79-μm cladding-pumping. Efficient cross-relaxation requires high Tm-concentration ( > 3wt%). This results in a high core refractive index (thus higher V-number) that degrades the beam quality. It also increases the thermal load per unit length, although this can be reduced by a large cladding-to-core area ratio that increases the absorption length of the fiber. A long fiber also shifts the emission to long wavelengths with more signal re-absorption. For short-wavelength emission the re-absorption must be reduced in some other way, which also ensures adequate total pump absorption. Simplest technique is to reduce the area ratio, but then excessive thermal load or inefficient cross-relaxation (if the Tm-concentration is low to reduce the thermal load per unit length) hampers power-scaling.
关键词： short-wavelength,Thulium-doped fiber lasers,power-scalable fiber design,near-diffraction-limited beam
更新于2025-09-11 14:15:04
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A Double-Cladding Single Polarization Photonic Crystal Fiber and Its Structure Deviation Tolerance
摘要： We propose a novel broadband single-polarization single-mode photonic crystal fiber (SPSM-PCF) with hexagonally latticed circular airholes. Combined with our fabricated polarization maintaining fiber, it has demonstrated that the enlarged air holes in the outmost layer are superior for the confinement loss reduction. At the optimized parameters, the wavelength of SPSM region is ranging from 1.52 μm to 2.13 μm, where only y-polarized fundamental mode exists and the confinement loss is 0.051 dB/km at 1.55 μm. The influence of realistic fabrication errors involving structure deviation on SPSM operation has also been systematically investigated.
关键词： fiber properties.,Fiber design and fabrication,photonic crystal fibers,single-polarization single mode
更新于2025-09-09 09:28:46