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Single mode fibre with low bending loss and low nonlinear effect

A non-linear effect, bending loss technology, applied in the direction of multi-layer core/cladding fiber, cladding fiber, optical waveguide light guide, etc. Low nonlinear effects, relaxed manufacturing tolerances

Active Publication Date: 2010-07-14
HANGZHOU FUTONG COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved and the technical task proposed by the present invention are to overcome the limitation of the bandwidth of the optical fiber existing in the prior art, which cannot fully meet the current G.656 optical fiber standard and the manufacturing process caused by the shape of the parabola is relatively complicated, and makes further Improve the defect that the qualified rate of optical fiber manufacturing is limited, and provide a single fiber with low bending loss and low nonlinear effect that is feasible in technology, has relatively loose manufacturing tolerance requirements, relatively low manufacturing cost, and can fully meet today's G.656 optical fiber standards. mode fiber

Method used

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  • Single mode fibre with low bending loss and low nonlinear effect
  • Single mode fibre with low bending loss and low nonlinear effect
  • Single mode fibre with low bending loss and low nonlinear effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] MCVD (or PCVD) is used to manufacture the core rod, and OVD (or RIC) technology is used to manufacture the outer cladding to manufacture the optical fiber preform. When depositing the recessed region 111 of the core layer, the raw material SiCl 4 Doped with a certain amount of GeCl 4 Make the value of the refractive index difference Δc in the depressed region of the core layer 0.0038 at a wavelength of 632.8 nm; when depositing the non-recessed region 112 of the core layer, adjust the GeCl 4 The doping amount makes the value of the refractive index difference Δ1 in the non-recessed region of the core layer 0.0094 at a wavelength of 632.8nm; when depositing the first cladding region 113, use pure SiCl 4 Raw material; when depositing the second cladding region 114, the raw material SiCl 4 Doped with a certain amount of GeCl 4 Make the value of the second cladding refractive index difference Δ2 at a wavelength of 632.8nm 0.010; when depositing the third cladding region ...

Embodiment 2

[0087] MCVD (or PCVD) is used to manufacture the core rod, and OVD (or RIC) technology is used to manufacture the outer cladding to manufacture the optical fiber preform. When depositing the recessed region 111 of the core layer, the raw material SiCl 4 Doped with a certain amount of GeCl 4 Make the value of the refractive index difference Δc in the depressed region of the core layer 0.0035 at a wavelength of 632.8 nm; when depositing the non-recessed region 112 of the core layer, adjust the GeCl 4 The doping amount of the core layer makes the value of the refractive index difference Δ1 of the non-recessed region of the core layer 0.0088 at a wavelength of 632.8nm; when depositing the first cladding region 113, use pure SiCl 4 Raw material; when depositing the second cladding region 114, the raw material SiCl 4 Doped with a certain amount of GeCl 4 The value of the second cladding refractive index difference Δ2 at a wavelength of 632.8nm is 0.0097; when depositing the third...

Embodiment 3

[0089] MCVD (or PCVD) is used to manufacture the core rod, and OVD (or RIC) technology is used to manufacture the outer cladding to manufacture the optical fiber preform. When depositing the recessed region 111 of the core layer, the raw material SiCl 4 Doped with a certain amount of GeCl 4 Make the value of the refractive index difference Δc in the depressed region of the core layer 0.0073 at a wavelength of 632.8 nm; when depositing the non-recessed region 112 of the core layer, adjust the GeCl 4 The doping amount of the core layer makes the value of the refractive index difference Δ1 of the non-recessed region of the core layer 0.0088 at a wavelength of 632.8nm; when depositing the first cladding region 113, use pure SiCl 4 Raw material; when depositing the second cladding region 114, the raw material SiCl 4 Doped with a certain amount of GeCl 4 The value of the second cladding refractive index difference Δ2 at a wavelength of 632.8nm is 0.0010; when depositing the third...

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Abstract

The invention relates to a single mode fiber with low bend loss and low nonlinear effect, belonging to optical communication technical field, while prior fiber has limited bandwidth and is fail to meet the standard of prior G.656 fiber. The invention comprises a bare glass fiber and a resin protective layer surrounding the bare glass fiber. The inveniotn is characterized in that the bare glass fiber is composed of one core layer area and three clad layer areas, wherein the core layer area is composed of a low index concave area and a high index non-concave area, the first and second clad layer areas are pure SiO2 layers, the refractive index difference of the second clad layer is higher than the refractive index difference of the core layer area, the refractive index sections of the core layer area and the three clad layer areas are in step shape. The invention reasonably designs the core and clad layers of fiber to realize low bend loss and low nonlinear effect meeting prior G.656 fiber standard, high-speed transmission system and WDM system.

Description

technical field [0001] The invention relates to an optical fiber, which belongs to optical communication technology, in particular to a single optical fiber that meets the G.656 optical fiber standard, has low bending loss, low nonlinear effect, and is suitable for high-speed transmission systems and wavelength division multiplexing systems (WDM). mode fiber. Background technique [0002] At present, there are two main types of optical fibers commonly used in transmission network construction, namely G.652 conventional single-mode optical fiber and G.655 non-zero dispersion-shifted optical fiber. Generally, the dispersion of G.652 single-mode fiber in the C-band 1530nm-1565nm and L-band 1565nm-1625nm is relatively large, generally 17-22ps / nm·km. When opening high-speed systems such as 10Gb / s and 40Gb / s and single-channel high-speed WDM systems, dispersion compensating fiber (DCF) must be used for dispersion compensation to reduce the dispersion at 1550nm on the entire line....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036G02B6/02
Inventor 张立永吴兴坤卢卫民杨军勇
Owner HANGZHOU FUTONG COMM TECH CO LTD
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