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High non-linear photon crystal optical fiber preparation method

A photonic crystal fiber, high nonlinear technology, applied in nonlinear optics, clad optical fiber, optical waveguide light guide, etc., can solve the problem of low nonlinear coefficient and achieve high nonlinear effect

Inactive Publication Date: 2007-10-24
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used photonic crystal fiber uses oxide glass materials such as quartz, which has the problem of low nonlinear coefficient.

Method used

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preparation example Construction

[0016] 1. Preparation of Specific Materials

[0017] (1) From the perspective of the structure and function of the material, optimize the design through experiments, adjust the glass components, and synthesize a highly nonlinear glass system suitable for photonic crystal fibers with excellent performance. At the same time, research on doping Pb and other heavy metal elements in oxide and non-oxide glasses to improve the nonlinear effect of the material, and clarify the doping mechanism, so that the nonlinear effect of the material can be improved more effectively through doping. The nonlinear coefficient of the material can reach more than 60 / (W·km).

[0018] (2) Use X-ray diffraction analysis, differential thermal analysis, electron microscope analysis and various spectral tests to study the properties of glass such as softening temperature, operating temperature, crystallization temperature, glass transition temperature, annealing temperature range, and the doping of heavy m...

Embodiment 1

[0029] The quartz tube is vacuum-fused and sealed, and naturally cooled in the air to form a glass sample preparation method. In order to fully carry out the reaction, sample preparation was carried out in a swing furnace. The experimental raw materials are high-purity 5N Ge, 5N As and analytically pure S powder, which are weighed according to the designed molar ratio of 20Ge·25As·55S, placed in a quartz glass tube, and vacuumized for 10 -6 Bar. After fusing and sealing the quartz tube, it was placed in a rocking furnace for sample preparation. Due to the large sulfur content in the ingredients, in order to prevent the explosion of the sulfur vapor pressure in the tube during the sample preparation process, the following measures were taken: the heating rate was 3 °C / min before 450 °C, and the temperature was kept at 450 °C for 1 hour, and then Then raise the temperature at a heating rate of 7°C / min, keep the temperature at 900°C for 8 hours, and then cool naturally in the a...

Embodiment 2

[0031] Except that the experimental raw materials of high-purity 5NGe, 5NAs and analytically pure S powder are taken according to the designed molar ratio of 15Ge·25As·60S, the others are the same as in Example 1.

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Abstract

The invention provides a method for preparing high non-linearity photon crystal fiber, comprising that (1), synthesizing high non-linearity glass that from photon crystal fiber angle, using general method to synthesize the oxide glass and non-oxide glass with high non-linearity, (2), preparing high non-linearity photon crystal fiber preformed rod that using the synthesized high non-linearity glass as base material to prepare a photon fiber model with single core structure, correcting the rough part in the mode, based on the effects of independent parameter on the change tendency of effective area, crystallization ability in different temperatures and thermal stress in different cooling speeds, finding the technique and preparing the preformed rod, (3), preparing high non-linearity photon crystal fiber that drawing the preformed rod, to prepare the fiber. The inventive photon crystal fiber has high non-linearity.

Description

technical field [0001] The invention relates to the field of optical fibers, in particular to a preparation method of highly nonlinear photonic crystal optical fibers. Background technique [0002] Since Yablonovitch and John first proposed the concept of photonic crystals in 1987, in 1998, the University of Bath in the United Kingdom began to study highly nonlinear photonic crystal fibers, and made a detailed description from the aspects of theoretical design and photonic crystal fiber structure. In 2003, J.K. Ranka, R.S. Windeler, and A.J. Stentz published a paper revealing the generation of a supercontinuum of 400-1600 nm observed in a 75 cm long photonic crystal fiber. Foreign studies have shown that in photonic crystal fibers, using a large air filling ratio relative to the aperture can obtain Aeff in the range of 1 to 2 μm 2 Photonic crystal fiber with high nonlinear effect. The photonic crystal fiber made of silica and air has a nonlinear coefficient as high as 60 / (...

Claims

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Application Information

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IPC IPC(8): G02F1/355G02B6/02
Inventor 刘启明赵修建
Owner WUHAN UNIV OF TECH
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