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A kind of high-attenuation optical fiber and its preparation method

A high-attenuation, optical fiber technology, applied in the field of optical fiber devices, can solve problems such as differences in attenuation coefficients, and achieve the effects of small change rate, high precision, and good stability

Active Publication Date: 2020-04-24
武汉库克光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology does not better solve the problem of taking into account the higher attenuation coefficient value and the smaller attenuation coefficient difference

Method used

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  • A kind of high-attenuation optical fiber and its preparation method
  • A kind of high-attenuation optical fiber and its preparation method
  • A kind of high-attenuation optical fiber and its preparation method

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preparation example Construction

[0052] The preparation method of the high-attenuation optical fiber provided by the present invention comprises the following steps:

[0053] (1) Mix the first phase containing the metal elements in the formula ratio with the second phase mainly composed of loose quartz glass powder to form a uniform solid phase; wherein the first phase is a liquid phase and / or a solid phase , the density of the quartz glass powder is 0.3~1.1 g / cm 3 .

[0054] Preferably, the first phase is a liquid phase, which contains two or more of cobalt ions, iron ions, chromium ions, manganese ions, and nickel ions;

[0055] The loose quartz glass powder is prepared by a chemical vapor deposition process, and preferably contains germanium in a formula ratio. Chemical vapor deposition processes include VAD, MCVD or OVD processes.

[0056] The loose quartz glass powder prepared by the chemical vapor deposition process is white opaque silicon dioxide; the quartz glass powder is loose and contains a larg...

Embodiment 1

[0069] Using OVD (outside vapor deposition process) to deposit quartz powder, the powder is made of silicon tetrachloride, germanium tetrachloride, O 2 and C 2 f 6 The reaction gas undergoes a chemical reaction under the heating of a heat source such as a hydrogen-oxygen flame to produce an opaque white silica powder with a density of 0.4 to 0.7 g / cm3. Then, take the cobalt, iron, chromium salt of corresponding mass according to the molar ratio, fully dissolve in water or alcohol solution, and then mix with the silicon dioxide powder of corresponding proportion mass and disperse evenly. Then use microwave radiation to heat and remove free water for drying. The microwave radiation time is preferably 0.1 min to 30 min, the microwave frequency range is 1.0 GHz to 2.45 GHz, and the microwave radiation power is 0.5 kW to 10 kW. After drying, fully grind and mix the silica powder absorbed with the metal salt, and then isostatically compress it into a dense powder with a density of...

Embodiment 2

[0072] Using MCVD (modified chemical vapor deposition process) to deposit quartz powder, the powder is made of silicon tetrachloride, germanium tetrachloride, O 2 and C 2 f 6 The reaction gas reacts chemically in the tube under the heating of a heat source such as a hydrogen-oxygen flame, and produces an opaque white silica powder with a density of 0.3 to 0.7 g / cm3. After taking out the powder, weigh the corresponding mass of cobalt, iron, chromium, aluminum salt according to the molar ratio, fully dissolve in water or alcohol solution, and then mix with the corresponding proportion of mass of silica powder and disperse evenly. Then use microwave radiation to heat and remove free water for drying. The microwave radiation time is preferably 0.1 min to 10 min, the microwave frequency range is 1.0 GHz to 2.45 GHz, and the microwave radiation power is 0.5 kW to 5 kW. After drying, fully grind and mix the silica powder absorbed with the metal salt, and then isostatically compress...

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Abstract

The invention discloses a high attenuation optical fiber and a preparation method thereof. The refractive index profile of a core cladding of the high attenuation optical fiber is a step-type structure, and the change rate of the fiber core refractive index is between 1% to 15%. A core layer contains two or more metal elements with unfilled valence layer d orbitals. The metal elements are transition metal elements of Groups 4 to 10 of the periodic table. The preparation method comprises the steps of (1) mixing a first phase containing the metal elements at a formulation ratio with a second phase containing a loose quartz glass powder as a main component to form a uniform solid phase; (2) preparing a solid transparent glass body from the uniform solid phase; and (3) using the solid transparent glass body as an optical fiber preform mandrel to prepare a high attenuation optical fiber preform and draw the high attenuation optical fiber preform into the high attenuation optical fiber. Thehigh attenuation optical fiber has flat attenuation spectra and good stability in optical fiber communication bands O, E, S, C, and L, the high attenuation optical fiber can meet the application requirements of an optical fiber communication network, an optical fiber data network, an optical fiber CATV network and an optical fiber test system, and improve the system performance.

Description

technical field [0001] The invention belongs to the field of optical fiber devices, and more specifically relates to a high-attenuation optical fiber and a preparation method thereof. The optical fiber has a high attenuation coefficient in the wavelength range of 1250nm to 1625nm, and better attenuation flatness. The optical fiber is made of The attenuator is used to reduce the optical signal power of the communication system, so as to meet the detection conditions of the photodetector. Background technique [0002] With the development of 5G network technology applications and people's increasing demand for broadband transmission, optical communication systems are developing towards long-distance, high-capacity, and high-speed directions. The transmission rate of optical fiber communication has been from the initial megabit / second (Mbps), to the current as high as 100Gbit / second, even 400Gbit / second. In order to meet the long-distance transmission requirements, optical fib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/025C03B37/012C03B37/018
CPCC03B37/01211C03B37/0128C03B37/018C03B37/025
Inventor 肖敏蔡钊柳涛肖遥张峰
Owner 武汉库克光电技术有限公司
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