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Optical fiber with large effective area

An effective area, optical fiber technology, applied in the direction of cladding optical fiber, multi-layer core/cladding optical fiber, light guide, etc., can solve the problems of silicon-oxygen tetrahedral structure damage, expanding the scope of micro-cracks, affecting the strength of the optical fiber, etc. Ensure the effect of strength, good roundness and large effective area

Inactive Publication Date: 2016-12-07
QINGDAO WINCHANCE TECH
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AI Technical Summary

Problems solved by technology

The impurity particles adhere to the surface of the optical fiber. During the cooling process, cracks and stress concentration are formed. The cracks on the optical fiber surface are gradually eroded by the action of water molecules in the atmospheric environment, resulting in the destruction of the silicon-oxygen tetrahedral structure, and the breakage of the silicon-oxygen bond will expand the microcracks. range, which affects fiber strength

Method used

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  • Optical fiber with large effective area

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Embodiment Construction

[0017] In high-speed and large-capacity DWDM (Dense Wavelength Division Multiplexing) systems, the transmission distance of traditional G.652D optical fibers and ultra-low loss optical fibers is limited due to nonlinear effects. With the emergence of various new coding methods (such as RZ (Return to Zero Code), etc.), error correction technologies (such as FEC (Forward Error Correction), SFEC (Super Forward Error Correction), etc.) and various low noise amplifiers (such as the development of DRA (Distributed Raman Fiber Amplifier), etc.), the OSNR (Optical Signal-to-Noise Ratio) tolerance requirements and OSNR degradation of DWDM systems have been significantly improved, and fiber loss is no longer the decisive factor limiting system transmission. . In the current DWDM system, the nonlinear effect has become the main limiting factor of the current high-speed optical fiber communication system. Under optical power transmission, nonlinear effects such as Raman scattering and Ke...

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Abstract

The invention relates to optical fiber with a large effective area. The mold field diameter of the optical fiber at the 1550 nm position is 12.0-13.6 micrometers, and the mold field area is larger than or equal to 120 square micrometers; the optical fiber sequentially comprises a core layer, cladding layers and coating layers, the core layer is a silicon dioxide glass layer with the radius of 5-7 micrometers, an inner cladding layer is a fluorine-doped inner cladding layer, the relative refringence difference is -0.4--0.2 %, the radius r3 of the middle cladding layer is 12-25 micrometers, and the outer cladding layer is a quartz glass layer with the radius r4 of 25-45 micrometers; the coating layers include an inner coating layer and an outer coating layer, the diameter of the inner coating layer is 192 micrometers, and the diameter of the outer coating layer is 245 micrometers. The cut-off wavelength, the bending loss, chromatic dispersion and other comprehensive performance parameters in the application wave band are good, the optical fiber can be used as long-distance optical fiber communication under bad conditions such as super crossing gobi and deep sea, the circular degree of all layers of the optical fiber is good, the round formed shape is ensured, and strain of the optical fiber can reach 2% or more.

Description

technical field [0001] The invention relates to the field of optical fibers, in particular to an optical fiber with a large effective area. Background technique [0002] Optical fiber strength is one of the key indicators of ultra-low loss optical fiber, which is mainly reflected in the screening strain. The strain of ordinary optical fiber is generally about 1% to deal with the tension caused by laying and thermal expansion and contraction, while ultra-low loss optical fiber is used in ultra-long In distance optical communication links, it is often necessary to cross harsh environments such as Gobi and deep sea. When considering laying or environmental temperature changes, the tension suffered is greater than that of ordinary optical cables. Considering the national standard of "Deep Sea Optical Cable", the difficulty of laying and In terms of service life, etc., it is hoped that the strain of the ultra-low loss optical fiber will reach 2% or more, which can fully meet the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B6/036
CPCG02B6/02009G02B6/036
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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