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Dispersion compensation optical fibre

A dispersion compensating fiber, negative dispersion technology, applied in cladding fiber, multi-layer core/cladding fiber, graded index fiber core/cladding fiber, etc., can solve difficult process control, RDS value variation range The problems of small size and the difficulty of PMD control of bending characteristics become more difficult to achieve the effect of fine control of the profile, reduction of the difficulty of process control, and excellent dispersion compensation effect.

Active Publication Date: 2007-05-23
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Problems solved by technology

This will lead to more difficult control of fiber attenuation, bending characteristics and PMD
[0005] In the prior art, such as U.S. Patent No. 6,546,178 B2, etc., waveguide designs for dispersion compensating fibers with relatively large relative dispersion slope RDS have been proposed, but there are still problems of insufficient RDS value and small variation range of RDS value. Therefore, for those with large RDS It is difficult to achieve a good compensation effect for the G.655 optical fiber with high value, and it is relatively difficult to control the process during production

Method used

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Embodiment Construction

[0023] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] The first embodiment is shown in Figure 1. The core includes four core layers 1, 2, 3, and 4 as doped regions. The radius ranges of each core layer from r1 to r4 are: 1.63 μm to 1.65 μm μm, 6.58μm to 6.62μm, 9.80μm to 10.20μm, 11.00μm to 12.00μm. where the r2 / r1 value is 4.03. The radius r5 of the cladding layer 5 is 124 μm to 126 μm. The relative refractive index difference of each core layer from Δ1% to Δ4% is: 1.966%, -0.527%, 0.462%, 0.186%, wherein the difference between Δ1% and Δ2% is 2.493%. The fluctuation range of the relative refractive index difference of each fiber core layer is ±0.020%. The relative refractive index difference Δ5% of the cladding layer 5 is pure SiO 2 relative refractive index difference. Between layers, especially between the first and second core layers, a refractive index distribution gradient is set to transi...

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Abstract

The present invention relates to one kind chromatic dispersion compensating fiber with negative chromatic dispersion and negative chromatic dispersion slope in C band optical communication window. The fiber includes fiber core and cladding of SiO2, and features that its fiber core includes at least four layers, of which the first layer has positive relative refractive index difference, the middle layer has negative relative refractive index difference and the maximum difference between relative refractive index differences of the first layer and the middle layer not lower than 2.45 %. The present invention can obtain relatively high negative chromatic dispersion and negative chromatic dispersion slope, high RDS value and wide RDS range, low attenuation and low PMD value, and can meet various compensation requirement of G.655.

Description

technical field [0001] The invention relates to a single-mode optical fiber with negative dispersion and negative dispersion slope in the C-band (1525nm-1565nm) optical communication window, the optical fiber can be used for dispersion and dispersion slope compensation of G.655 communication optical fiber, and has very low attenuation and PMD (Polarization Mode Dispersion) values. Background technique [0002] With the development of optical communication technology, the DWDM (Dense Wavelength Division Multiplexing) system based on G.655 optical fiber has been widely used, and it is developing in the direction of high speed, long distance, no repeater and dense channels. The requirements for dispersion compensation of optical fibers are becoming more and more stringent, requiring accurate dispersion management technology for optical communication links. Dispersion compensation of communication links using dispersion compensating fiber is currently the most used method. It u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/036G02B6/028
Inventor 曹宇青王铁军罗杰
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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