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A Low Loss Hollow Bandgap Photonic Crystal Fiber

A photonic crystal fiber, low-loss technology, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of large fiber loss and difficult realization of band gap transmission band, and achieve the effect of reducing attenuation and inner wall roughness

Active Publication Date: 2018-08-31
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

[0004] However, due to the many difficulties in the design and development of hollow bandgap photonic crystal fiber, its attenuation level at 1550nm wavelength is still on the order of several dB / km or above, and there are problems such as large fiber loss and difficulty in realizing the bandgap transmission band. Therefore, there has been no practical research results on optical fiber devices based on it

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  • A Low Loss Hollow Bandgap Photonic Crystal Fiber
  • A Low Loss Hollow Bandgap Photonic Crystal Fiber
  • A Low Loss Hollow Bandgap Photonic Crystal Fiber

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Embodiment Construction

[0025] Name definition:

[0026] Intrinsic spacing: refers to the spacing between air holes when two air holes of the same size and the surrounding quartz layers are next to each other. The spacing is used to describe the inherent spacing when the two air holes and the matching quartz layer are close together, so it is defined as the intrinsic spacing.

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0028] see figure 1 As shown, a low-loss hollow bandgap photonic crystal fiber includes a silica glass substrate, a cladding 3 and a coating 4 that are sequentially coated on the outside of the silica glass substrate, are arranged in the silica glass substrate, and are distributed along the fiber axis and run through the The set of air holes throughout the fiber. Wherein the cladding 3 has a diameter of 80 μm-135 μm, and the coating 4 has a diameter of 165 μm-250 μm.

[0029] see figure ...

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Abstract

A low-loss hollow bandgap photonic crystal fiber, which relates to the technical field of optical communication and related sensor devices, includes a quartz glass substrate and an air hole group arranged in the quartz glass substrate, distributed along the fiber axis and running through the entire fiber, and The air hole group includes a central hole located at the axis of the quartz glass substrate, and a multi-layered ring surrounding the central hole and arranged in a regular hexagonal shape. Each layer of the ring is composed of a number of edge holes; The radius of the center hole is greater than that of the edge holes; the center hole is filled with inert gas, and the air pressure in the center hole is greater than the air pressure in the edge holes, and the air pressure ratio between the two is 1.05-1.5. The invention can effectively reduce the attenuation of the hollow bandgap photonic crystal fiber, the attenuation is less than 5dB / km, and the optimal value can reach within 1dB / km.

Description

technical field [0001] The invention relates to the technical field of optical communication and related sensor devices, in particular to a low-loss hollow bandgap photonic crystal fiber. Background technique [0002] Photonic crystal fibers (PCFs) possess many unique and novel physical properties that are difficult or impossible to achieve with conventional silica single-mode fibers. At present, scientific issues such as photonic crystal fiber itself and the application of photonic crystal fiber characteristics in optical communication and optical network are major concerns of scientists all over the world, and international research in this field has just begun. In the field of nonlinear optics research, photonic crystal fibers can be used to generate supercontinuum spectra, optical soliton pulses, pulse compression, self-phase modulation and cross-phase modulation, parametric oscillation and four-wave mixing, etc. [0003] Conventional silica fiber is a refractive index-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
Inventor 罗文勇赵梓森李诗愈刘志坚李伟赵磊胡福明
Owner FENGHUO COMM SCI & TECH CO LTD