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Negative dispersion monomode optical fibre

A single-mode fiber, negative dispersion technology, applied in optics, light guides, optical components, etc., can solve the problem of fiber dispersion characteristics excluding L-band and other issues

Inactive Publication Date: 2003-02-05
SHANTOU HIGH TECH ZONE AOXING OPTICAL COMM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A kind of optical fiber disclosed in the patent CN1274856A, it has a small negative dispersion of -3.0+1.7ps / nm.km in the EDFA working area (1530nm-1565nm), and the average is less than 0.05ps / nm 2 Positive dispersion slope of .km, the fiber is used in WDM systems with dispersion compensation, and the dispersion characteristics of the fiber do not include the use extension of the L-band

Method used

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  • Negative dispersion monomode optical fibre
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  • Negative dispersion monomode optical fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] image 3 Shown is the distribution of the refractive index profile of the fiber in Example 1 of the negative dispersion fiber of the present invention.

[0066] Figure 2 Shown is the dispersion characteristic of Example 1 of the negative dispersion fiber of the present invention.

[0067] The fiber is a single-mode fiber, which has three core layers Core1, Core2, Core3 and six cladding layers Clad.1, Clad.2, Clad.3, Clad.4, Clad.5, Clad.6 ,in:

[0068] - First core layer Core1 with a relative refractive index difference Δ% Core1 approximately 0.760% of its diameter R Core1 About 3.4 μm.

[0069] - Second core layer Core2 with relative index difference Δ% Core2 approximately 0.520% of its diameter R Core2 About 4.6 μm.

[0070] - Third core layer Core3 with relative index difference Δ% Core3 approximately 0.190% of its diameter R Core3 About 5.6 μm.

[0071] - First cladding layer Clad.1 with relative refractive index difference Δ% Clad.1 is approximately 0....

- Embodiment 2

[0097] image 3 b shows the distribution of the refractive index profile of the fiber in Example 2 of the negative dispersion fiber of the present invention.

[0098] Figure 2 Shown is the dispersion characteristic of Example 2 of the negative dispersion fiber of the present invention.

[0099] The fiber is a single-mode fiber, which has three core layers Core1, Core2, Core3 and six cladding layers Clad.1, Clad.2, Clad.3, Clad.4, Clad.5, Clad.6 ,in:

[0100] - First core layer Core1 with a relative refractive index difference Δ% Core1 is about 0.758% of its diameter R Core1

[0101] About 4.0 μm.

[0102] - Second core layer Core2 with relative index difference Δ% Core2 is about 0.519% of its diameter R Core2 About 5.3 μm.

[0103] - Third core layer Core3 with relative index difference Δ% Core3 approximately 0.190% of its diameter R Core3 About 6.2 μm.

[0104] - First cladding layer Clad.1 with relative refractive index difference Δ% Clad.1 is about -0.031% of ...

Embodiment 2

[0111] The optical fiber of Embodiment 2 of the invention has the following characteristics:

[0112] - Dispersion characteristics

[0113] 1550nm dispersion coefficient: -3.4ps / nm.km

[0114] 1525nm to 1565nm dispersion coefficient range: -1.0ps / nm.km to -6.0ps / nm.km

[0115] 1550nm dispersion slope: 0.073ps / nm 2 .km

[0116] Zero dispersion wavelength: 1595nm

[0117] - Attenuation characteristics

[0118] 1550nm attenuation coefficient: 0.208dB / km

[0119] - Uncabled fiber cut-off wavelength λ c : 1300nm to 1400nm

[0120] -1550nm mode field diameter MFD: 8.2μm

[0121] -1550nm effective area A eff ;53μm 2

[0122] -Macrobending loss (75mm mandrel, 100 turns)

[0123] 1550nm: ≤0.01dB

[0124] - Hydrogen loss characteristics (1%H 2 Add 99% He, keep at 70°C for 16 hours)

[0125] 1530nm: ≤0.001dB / km

[0126] - PMD coefficient of uncabled fiber: ≤0.035ps / km 1 / 2

[0127] The single-mode fiber described in Embodiment 2 of the invention has a negative dispersion...

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Abstract

The invention relates to the monomode fiber with negative dispersion. The fiber possesses total negative dispersion and positive dispersion slope in the C wave band of the optical communication window or in the C and L wave band at the same time. Thus, the fiber can be used for the fiber for transferring signal in the C and L wave band of the fast DWDM optical communication system. The fiber core possesses the three layers and four packet-layers provided by the PCVD technique as well as the two packet-layers provided by the OVD technique. The fiber satisfies the need of increasing the PMD value and improves the properties of counter bending and anti hydrogen damage. With positive chirp laser being used, the fiber generates the compression effect of light pulse width so as to prolong the limited distance caused by the dispersion.

Description

technical field [0001] The invention relates to a single-mode optical fiber used for signal transmission in the field of optical communication. By adjusting the refractive index distribution of the waveguide, the optical fiber can have the optical communication window in the C-band (1525nm-1565nm) or the optical communication window in the C-band and L-band (1565nm-1625nm) at the same time, with a total dispersion of negative dispersion characteristics and a positive dispersion slope , has low fiber PMD, and has improved bending characteristics and resistance to hydrogen damage. Background technique [0002] With the rapid development of communication technology, higher requirements are put forward for the transmission fiber capacity and transmission rate. [0003] The traditional G.652 single-mode fiber has two transmission windows of 1310nm and 1550nm, and its zero dispersion point is located near 1310nm. For a long time, G.652 optical fiber has only been widely used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/19H04B10/2525
Inventor 曹宇清王铁军罗杰
Owner SHANTOU HIGH TECH ZONE AOXING OPTICAL COMM EQUIP
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