All-solid-state structure fluorotellurite glass optical fiber with dispersion close to zero and flatness, preparation method and application thereof

A technology of fluorotellurite and glass optical fiber, which is applied in the preparation and generation of mid-infrared optical frequency combs. In the field of all-solid-state structure fluorotellurite glass optical fiber, it can suppress the occurrence of SBS effect, and the repetition frequency can be tuned in a wide range. Reduce the effect of drift

Inactive Publication Date: 2020-06-26
JILIN UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the problem in the prior art of obtaining a wide bandwidth mid-infrared optical frequency with tunable repetition frequency from GHz to THz, the present invention provides an all-solid-state structure fluorotelluric acid that can be used to produce mid-infrared optical frequency combs with near-zero dispersion Salt Glass Fiber

Method used

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  • All-solid-state structure fluorotellurite glass optical fiber with dispersion close to zero and flatness, preparation method and application thereof
  • All-solid-state structure fluorotellurite glass optical fiber with dispersion close to zero and flatness, preparation method and application thereof
  • All-solid-state structure fluorotellurite glass optical fiber with dispersion close to zero and flatness, preparation method and application thereof

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Embodiment 1

[0035] An all-solid-state fluorotellurite glass optical fiber with nearly zero dispersion and flat structure. The optical fiber consists of a high-refractive-index glass core, a low-refractive-index annular glass layer, a high-refractive-index annular glass layer, and a low-refractive-index glass from the inside to the outside. The composition of the outer cladding, the cross-section of the fiber is as figure 1 (b) shown in the illustration; wherein, the material of the high refractive index glass core and the high refractive index annular glass layer is 70TeO 2 -20BaF 2 -10Y 2 o 3 (TBY mixture), the material of the low refractive index annular glass layer and the low refractive index glass outer cladding is 33AlF 3 -9BaF 2 -17CaF 2 -12YF 3 -8SrF 2 -11MgF 2 -10TeO 2 (ABCYSMT compound), the refractive index curves of TBY glass and ABCYSMT glass can be found in figure 2 (a). Among them, the refractive index of the TBY compound is about 1.82-1.95, and the refractive i...

Embodiment 2

[0039] A method for preparing an all-solid structure fluorotellurite glass optical fiber with near-zero flat dispersion, the specific steps are as follows:

[0040] Step 1: Preparation of high refractive index glass core:

[0041] Weigh 30-50g of TBY mixture and melt it into glass liquid at 900-1100°C. During the melting process, carry out in a nitrogen-protected glove box. After complete melting, clarify for 30-60 minutes, pour the molten TBY glass liquid into the Heat it into a barrel-shaped mold at 200-400°C, then move it to a muffle furnace that has been preheated to 300-500°C for 3 hours, and then lower it to room temperature to obtain a TBY glass core rod, which is precision ground and polished , make a TBY glass rod with a diameter of 5-10 mm, and set it aside;

[0042] Step 2: Preparation of low refractive index ring glass layer:

[0043] Weigh 40-80g of ABCYSMT mixture and melt it into glass liquid at 900-1100℃. During the melting process, carry out in a nitrogen-pr...

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Abstract

The invention discloses a dispersion near-zero flat all-solid-state structure fluorotellurite glass optical fiber, and a preparation method and application thereof, and belongs to the field of specialglass optical fibers, the optical fiber is composed of a high refractive index glass fiber core, a low refractive index annular glass layer, a high refractive index annular glass layer and a low refractive index glass outer cladding from inside to outside in sequence; two kinds of fluorotellurite glass with large refractive index difference are selected as optical fiber materials, an optical fiber structure is designed, and the optical fiber with the near-zero flat dispersion characteristic and the high nonlinear coefficient at the same time is obtained; the optical fiber is used as a non-linear medium, a numerical simulation result shows that when the length of the optical fiber is 2m, a phase matching condition between photons can be met in a broadband band range, a broadband mid-infrared optical frequency comb can be obtained, and the repetition frequency of the optical fiber is tunable in a large range.

Description

technical field [0001] The invention belongs to the field of special glass optical fibers, and in particular relates to an all-solid-state fluorotellurite glass optical fiber with near-zero flat dispersion, a preparation method and its application in producing mid-infrared optical frequency combs. Background technique [0002] An optical frequency comb is a series of comb teeth with equal frequency intervals and phase coherence in the frequency domain, and a pulsed light with a fixed repetition rate in the time domain. The 2-5μm mid-infrared optical frequency comb has important applications in the fields of space atmospheric communication, mid-infrared astronomical spectroscopy, high-speed molecular sensing, remote sensing, and ranging. There are four main ways to generate optical frequency combs, which are optical frequency combs based on mode-locked ultrashort pulse lasers, optical microcavities, electro-optical modulators, and traveling-wave four-wave mixing. Among them,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C13/04
CPCC03C13/048
Inventor 秦冠仕周宁宁黄雅莉贾志旭秦伟平
Owner JILIN UNIV
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