A hollow-core anti-resonant optical fiber with ginkgo leaf-shaped cladding
A technology of ginkgo biloba and anti-resonance, applied in the direction of multi-layer core/cladding optical fiber, cladding optical fiber, optical fiber, etc., can solve the problem of high optical fiber loss, achieve the effect of small material dispersion, reduce limit loss, and flat dispersion Effect
Active Publication Date: 2022-04-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
However, in the circular cladding tube hollow core antiresonant fiber with these two structural features, there are tube modes in the cladding tube, and these tube modes are mode-coupled with the fundamental mode in the fiber core, so that the fiber loss is still high
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[0026] figure 1 It is a schematic diagram of the cross-sectional structure of a hollow-core anti-resonant optical fiber with a ginkgo leaf-shaped cladding of the present invention.
[0027] In this embodiment, a hollow-core anti-resonant optical fiber with ginkgo biloba-shaped cladding has a structure such as figure 1 As shown, from the outside to the inside are the optical fiber outer tube 1, the ginkgo leaf-shaped cladding tube 2, and the air core 3.
[0028] The optical fiber outer tube 1 is the outermost layer of the hollow-core anti-resonance optical fiber, and wraps the ginkgo leaf-shaped cladding tube 2 and the air core 3 inside.
[0029] The ginkgo leaf-shaped cladding tube is usually made of silica and has a thickness of t. The design should follow the principle of anti-resonant reflective waveguide (ARROW), that is, satisfy:
[0030]
[0031] Among them, λ is the designed working wavelength, n 1 Indicates the refractive index of the ginkgo leaf-shaped cladding ...
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Abstract
The invention discloses a hollow-core anti-resonant optical fiber with a ginkgo leaf-shaped cladding, which consists of an optical fiber outer tube, a ginkgo-leaf-shaped cladding tube and an air core from outside to inside; wherein, the ginkgo-leaf-shaped cladding tube is designed in terms of It satisfies the principle of anti-resonant reflective waveguide (ARROW). It is made of glass and has a thickness of t. After winding, the entire ginkgo leaf-shaped cladding tube presents a neat ginkgo leaf shape, which is composed of a front arc and two back arcs. , wherein, the front arc section and the back arc section are both negative curvature relative to the air core, that is, they are bent toward the outside of the air core; a plurality of ginkgo leaf-shaped cladding tubes are fixed on the optical fiber outer tube in a rotationally symmetrical manner.
Description
technical field [0001] The invention belongs to the technical field of optical fiber communication, and more specifically relates to a hollow-core anti-resonant optical fiber with ginkgo leaf-shaped cladding. Background technique [0002] Conventional solid-core optical fibers usually use a light-guiding mechanism of total internal reflection, so the core must use a material with a higher refractive index. The traditional solid-core silica fiber mainly made of silicon-based materials will produce extremely high absorption loss when transmitting mid-infrared light, while the laser damage threshold of sulfide fiber is low, and the material purification technology is not mature enough (Guo Haitao, Cui Jian, Xu Yantao, et al. .Research progress in the preparation and application of low-loss chalcogenide infrared optical fibers[J].Laser and Optoelectronics Progress, 2019,56(17):93-111.), fluoride optical fibers are prone to deliquescence and end-face damage (Jia Zhixu, Yao Chuanf...
Claims
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IPC IPC(8): G02B6/036G02B6/032
CPCG02B6/03694G02B6/032
Inventor 凌云罗素邱昆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA