Bending non-sensitive fibre optical with moderate modulus filed diameter

Active Publication Date: 2006-08-16
JIANGSU HENGTONG OPTICAL FIBER TECH +1
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Problems solved by technology

[0003] Due to the large mode field diameter (MFD) of conventional G.652 single-mode fiber, the general MAC value (that is, the mode field diameter divided by the cut-off wavelength) is in the range of 6-8, resulting in excessive macrobending loss, which is not suitable for small diameters (such as Curl with a bending diameter of 30mm), which brings inconvenience to the construction work of the access network
[0004] The G.655 single-mode fiber suitable for long distance, high capacity and high transmission rate focuses on the design of the optical fiber refractive index profile structure between the effective area of ​​the fiber and the dispersion characteristics in the C-band (or plus the L-band, or plus S-band, or the balance of S-band and L-band), generally speaking, there are two design ideas for this kind of fiber: one is that the fiber has a large effective area, and the dispersion characteristics are often not optimized enough; the second The first is that this kind of fiber has small disp

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  • Bending non-sensitive fibre optical with moderate modulus filed diameter

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[0032] Example:

[0033] exist figure 1 , there are the following waveguide structure parameters including three core layers with different refractive index distributions and three cladding layers with different refractive index distributions relative to cladding 3 (Clad3):

[0034] The relative refractive index difference of the core layer 1 (Core1) is about 0.47%, and the radius of the core layer 1 (Core1) is about 0.6 microns;

[0035] The relative refractive index difference of the core layer 2 (Core2) is about 0.53%, and the radius of the core layer 2 (Core2) is about 2.6 microns;

[0036] The relative refractive index difference of the core layer 3 (Core3) is about 0.3%, and the radius of the core layer 3 (Core3) is about 4.3 microns;

[0037] The relative refractive index difference of cladding 1 (Clad1) is about -0.3%, and the radius of cladding 1 (Clad1) is about 5.7 microns;

[0038] The relative refractive index difference of the cladding layer 2 (Clad2) is about...

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Abstract

A monomode optical fiber with suitable mode-field diameters, whcih is not sensitive to bending, is available for double windows of 1310nm and 1550nm wavelengths. It consists of three sub-layered cores and three sub-claddings with different refraction index profiles. The third layer of the sub-claddings is of pure silicon dioxide glass. It is suitable for distribution in rooms.

Description

technical field [0001] The invention relates to an optical fiber for access network and FTTH, especially a bending-insensitive single-mode optical fiber with moderate mode field diameter which has excellent bending performance and is suitable for storage in junction boxes or airtight containers. Background technique [0002] At present, as FTTH begins to penetrate into residential users, the amount of optical fiber access network construction has increased significantly. Access network construction requires easier networking work and shorter time. This requires that the single-mode optical fiber suitable for the access network has the characteristics of small additional loss, high strength and suitable mode field diameter under a small bending radius, which is convenient for wiring construction and crimping, and can control the connection loss with the laid optical fiber at the same time. [0003] Due to the large mode field diameter (MFD) of convent...

Claims

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Application Information

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IPC IPC(8): G02B6/028G02B6/036G02B6/02
Inventor 尹红兵高安敏王德荣赵建东肖华宋君
Owner JIANGSU HENGTONG OPTICAL FIBER TECH
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