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L-band dispersion compensating fiber and transmission system including same

A dispersion compensating fiber and optical transmission technology, applied in electromagnetic wave transmission systems, transmission systems, optical fibers with required dispersion, etc., can solve problems such as deteriorating optical fiber performance, and achieve the effect of excellent bending loss characteristics

Inactive Publication Date: 2005-07-27
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these high data rates deteriorate the performance of the fiber

Method used

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  • L-band dispersion compensating fiber and transmission system including same
  • L-band dispersion compensating fiber and transmission system including same
  • L-band dispersion compensating fiber and transmission system including same

Examples

Experimental program
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Effect test

example 1

[0062] DC Fiber 20 Press figure 2 designed and have the structure described above. The layers are counted sequentially, starting with 1 for the central core layer around the centerline. Using the definitions above, the core structure is also described in Table 1.

[0063] As illustrated in Figures 6 to 8, the DC fiber 20 of this embodiment has the following expected properties:

[0064] - The total dispersion at 1570nm is -90ps / nm-km;

[0065] - The total dispersion at 1595nm is -115ps / nm-km;

[0066] - The total dispersion at 1620nm is -148ps / nm-km;

[0067] - The dispersion slope at 1595nm is -1.18ps / nm 2 -km;

[0068] — cut-off wavelength, λ c1 , is 2019nm (the highest cut-off wavelength is LP 11 and LP 02 is higher than the LP of a straight DC fiber 01 higher-order mode);

[0069] — effective area, A eff , 17.17μm 2 ;

[0070] - an attenuation of 0.5dB / km at 1595nm; and,

[0071] — Benchmark array bending loss is 6.4dB.

example 2

[0073] The second triple-core DC fiber 120 is designed according to the refractive index profile shown in FIG. 3 . In this case, the alpha profile of the core layer 122 starts at 0.2 μm from the centerline and has an alpha of 2.0, Δ 1 % is 1.83%, and R 1 is 1.81 μm. Isolation strata 1 24 have a sloping segmental distribution, with the most negative Δ 2 % is -0.6%, and the outside diameter R 2 is 5.38 μm. The annular layer 126 has a Δ 3 % is 0.85% above the defined midpoint radius R 3 is 7.02 μm, and the width of the middle point is 0.8 μm. Other properties and characteristics can also be found in Table 1.

[0074] As shown in Figure 6 to Figure 8 As illustrated, the DC fiber 120 may have the following expected properties:

[0075] - The total dispersion at 1570nm is -118ps / nm-km;

[0076] - The total dispersion at 1595nm is -142ps / nm-km;

[0077] - The total dispersion at 1620nm is -180ps / nm-km;

[0078] - The dispersion slope at 1595nm is -1.46ps / nm 2 -km;

[0...

example 3

[0085] The DC fiber 220 according to the present invention is Figure 4 The distribution design shown. The core layer 222 has a refractive index Δ 1 is 1.73% and the outer radius R 1 is 1.83 μm. The alpha distribution has an alpha of 2.2. The isolation layer layer 224 has a Δ 2 % is -0.5%, and the outer layer radius R 2 is 5.87 μm. The annular layer 226 has a Δ 3 % is 0.85 and the midpoint R 3 is 7.53 μm.

[0086] The DC fiber 220 may have the following expected properties:

[0087] - The total dispersion at 1570nm is -75ps / nm-km;

[0088] - The total dispersion at 1595nm is -95ps / nm-km;

[0089] - The total dispersion at 1620nm is -126ps / nm-km;

[0090] —The dispersion slope is -1.04ps / nm 2 -km;

[0091] — cut-off wavelength, λ c1 , is 2010nm (the highest cut-off wavelength is LP 11 and LP 02 is higher than the LP of a straight DC fiber 01 higher-order mode);

[0092] — effective area, A eff , 16.73μm 2 ;

[0093] - an attenuation of 0.5dB / km at 1595nm; an...

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Abstract

The present invention relates to a dispersion compensating optical fiber ('DC fiber') having a segmented core of at least three segments and having a negative total dispersion and negative dispersion slope in the L-band. The index profile of the segmented core is selected to provide an optical fiber having properties suitable for a high performance communication system operating in the L-band wavelength band, i.e., between about 1570 nm to 1620 nm. The DC fiber according to the invention exhibits total dispersion at 1595 nm of between -70 and -225 ps / km / nm and dispersion slope more negative than -0.7 ps / km / nm2. The DC fiber may be optically connected to a non-zero dispersion shifted fiber in the system to compensate for dispersion and dispersion slope thereof.

Description

field of invention [0001] This application claims the benefit of and priority to US Patent Application No. 09 / 965,406, filed September 26,2001. field of invention [0002] The present invention relates to a dispersion compensating optical fiber and a transmission system including the optical fiber, more specifically, to a dispersion compensating optical fiber and a transmission system, wherein the dispersion optical fiber exhibits negative dispersion and dispersion slope in the L band (1570nm to 1620nm) . Background of the invention [0003] The communications industry requires higher data rates. As a result, research on high-performance optical fibers suitable for long-distance high-data-rate communications has been strengthened. However, these high data rates deteriorate the performance of the fiber. For these systems, especially those employing large effective area fibers, dispersion is a serious problem. More spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036H04B10/18
CPCG02B6/0228H04B10/2525G02B6/02261G02B6/03677
Inventor P·G·赫布根G·齐L·张
Owner CORNING INC