High-capacity low-slope dispersion displacement sigle-mode optical fibre for transmission

Abstract

The present invention relates to a single module transmitting optic fiber with large capacity and low slope of chromatic dispersion. The fiber includes a core and a coating, characterized in that the core has 3-5 core layers with different distributions of refraction index, the coating has 4-6 coating sub-layers. The general slope of chromatic dispersion of the optic fibers at 1550 nm is less than 0.060 ps / nm2.km, the wavelength with zero chromatic dispersion is less than 1420 nm, the effective area is between 55-65 micron m2, the chromatic dispersion in the range of 1530-1565 nm is between 5.0-12.0 ps / nm2.km. The present invention has the advantages of low slope chromatic dispersion, moderate amount of chromatic dispersion, low attenuation, and excellent bend resistance properties.

Description

technical field

[0001] The present invention relates to a single-mode optical fiber designed for large-capacity transmission systems. The single-mode optical fiber has low dispersion slope, moderate dispersion, low attenuation and excellent bending resistance. It is suitable for high-speed (10Gbit / S and 40Gbit / S), large-capacity, and long-distance DWDM systems. The S-C-L band of this fiber can be used for DWDM transmission. Background technique

[0002] Since the mid-1990s, with the development of erbium-doped fiber amplifiers and wavelength division multiplexing technology, optical fiber communication has entered an unprecedented high-speed development stage. The capacity of optical fiber communication doubles every year. At present, the rate of commercial transmission systems has reached 10Gbit / S, and the capacity has reached the level of 1.6T. When the transmission rate exceeds 2.5Gbit / S, and with the practicality of optical fiber amplifiers, disp...

Examples

Embodiment 1

[0028] Embodiment 1: listed below is figure 1 A set of relative refractive index difference distribution parameters is shown, the parameters of each layer of the core are: the parameters of the first core layer Core1 are: ΔCore1% is about 0.64, ΦCore1 is about 3.0 μm, and the second core layer Core2 The parameters of ΔCore2% are about 0.42, ΦCore2 is about 4.1μm The parameters of the third core layer Core3 are: ΔCore3% is about 0.21, ΦCore3 is about 7.5μm The parameters of the fourth fiber core layer Core4 are: ΔCore4% About 0.15, ΦCore4 is about 9.0 μm The parameters of each cladding layer are: The parameters of the first cladding layer Clad1 are: ΔClad1% is about 0.04, ΦClad1 is about 15.0 μm The parameters of the second cladding layer Clad2 are : ΔC1ad2% is about 0.25, ΦClad2 is about 21.0 μm The parameter of the third cladding layer Clad3 is: ΔClad3% is about 0.04, ΦClad3 is about 27.0 μm The parameter of the fourth cladding layer Clad4 is: ΔClad4% is about 0.02 , ΦClad4 ...

Embodiment 2

[0029] The characteristic of the optical fiber described in embodiment 1 has a dispersion slope less than 0.055ps / nm at 1550nm 2 kn, the zero-dispersion wavelength is moved out of the S-band, and the attenuation and bending performance are excellent. After the cable is formed, the cut-off wavelength drops by 200 to 400 nanometers. The optical fiber can meet the needs of dense wavelength division multiplexing transmission in the S+C+L band. . Embodiment 2: listed below is figure 2 A set of relative refractive index difference distribution parameters is shown, the parameters of each layer of the core are: the parameters of the first core layer Core1 are: ΔCore1% is about 0.42, ΦCore1 is about 4.6 μm, and the second core layer Core2 The parameters are: ΔCore2% is about 0.35, ΦCore2 is about 6.0 μm The parameters of the third core layer Core3 are: ΔCore3% is about 0.28, ΦCore3 is about 7.1 μm The parameters of each layer of the cladding are: the first cladding The parameters of...

Embodiment 3

[0031] Embodiment 3: listed below is image 3 A set of distribution parameters of relative refractive index difference is shown, which is a structure in which the relative refractive index difference of two layers in the cladding layer is negative. The parameters of each layer of the fiber core are: The parameters of the first fiber core layer Core1 are: ΔCore1% is about 0.42, ΦCore1 is about 4.6 μm The parameters of the second fiber core layer Core2 are: ΔCore2% is about 0.35, ΦCore2 is about 0.35, ΦCore2 is about The parameters of the third core layer Core3 are 6.0 μm: ΔCore3% is about 0.28, and ΦCore3 is about 7.1 μm. The parameters of each layer of the cladding layer are: the parameters of the first cladding layer Clad1 are: ΔClad1% is about - 0.08, ΦClad1 is about 12.5μm The parameter of the second cladding layer Clad2 is: ΔClad2% is about 0.18, ΦClad2 is about 18.1μm The parameter of the third cladding layer Clad3 is: ΔClad3% is about -0.08, ΦClad3 is about The 29.0 μm ...

technical field

[0001] The present invention relates to a single-mode optical fiber designed for large-capacity transmission systems. The single-mode optical fiber has low dispersion slope, moderate dispersion, low attenuation and excellent bending resistance. It is suitable for high-speed (10Gbit / S and 40Gbit / S), large-capacity, and long-distance DWDM systems. The S-C-L band of this fiber can be used for DWDM transmission. Background technique

[0002] Since the mid-1990s, with the development of erbium-doped fiber amplifiers and wavelength division multiplexing technology, optical fiber communication has entered an unprecedented high-speed development stage. The capacity of optical fiber communication doubles every year. At present, the rate of commercial transmission systems has reached 10Gbit / S, and the capacity has reached the level of 1.6T. When the transmission rate exceeds 2.5Gbit / S, and with the practicality of optical fiber amplifiers, disp...

Examples

Embodiment 1

[0028] Embodiment 1: listed below is figure 1 A set of relative refractive index difference distribution parameters is shown, the parameters of each layer of the core are: the parameters of the first core layer Core1 are: ΔCore1% is about 0.64, ΦCore1 is about 3.0 μm, and the second core layer Core2 The parameters of ΔCore2% are about 0.42, ΦCore2 is about 4.1μm The parameters of the third core layer Core3 are: ΔCore3% is about 0.21, ΦCore3 is about 7.5μm The parameters of the fourth fiber core layer Core4 are: ΔCore4% About 0.15, ΦCore4 is about 9.0 μm The parameters of each cladding layer are: The parameters of the first cladding layer Clad1 are: ΔClad1% is about 0.04, ΦClad1 is about 15.0 μm The parameters of the second cladding layer Clad2 are : ΔC1ad2% is about 0.25, ΦClad2 is about 21.0 μm The parameter of the third cladding layer Clad3 is: ΔClad3% is about 0.04, ΦClad3 is about 27.0 μm The parameter of the fourth cladding layer Clad4 is: ΔClad4% is about 0.02 , ΦClad4 ...

Embodiment 2

[0029] The characteristic of the optical fiber described in embodiment 1 has a dispersion slope less than 0.055ps / nm at 1550nm 2 kn, the zero-dispersion wavelength is moved out of the S-band, and the attenuation and bending performance are excellent. After the cable is formed, the cut-off wavelength drops by 200 to 400 nanometers. The optical fiber can meet the needs of dense wavelength division multiplexing transmission in the S+C+L band. . Embodiment 2: listed below is figure 2 A set of relative refractive index difference distribution parameters is shown, the parameters of each layer of the core are: the parameters of the first core layer Core1 are: ΔCore1% is about 0.42, ΦCore1 is about 4.6 μm, and the second core layer Core2 The parameters are: ΔCore2% is about 0.35, ΦCore2 is about 6.0 μm The parameters of the third core layer Core3 are: ΔCore3% is about 0.28, ΦCore3 is about 7.1 μm The parameters of each layer of the cladding are: the first cladding The parameters of...

Embodiment 3

[0031] Embodiment 3: listed below is image 3 A set of distribution parameters of relative refractive index difference is shown, which is a structure in which the relative refractive index difference of two layers in the cladding layer is negative. The parameters of each layer of the fiber core are: The parameters of the first fiber core layer Core1 are: ΔCore1% is about 0.42, ΦCore1 is about 4.6 μm The parameters of the second fiber core layer Core2 are: ΔCore2% is about 0.35, ΦCore2 is about 0.35, ΦCore2 is about The parameters of the third core layer Core3 are 6.0 μm: ΔCore3% is about 0.28, and ΦCore3 is about 7.1 μm. The parameters of each layer of the cladding layer are: the parameters of the first cladding layer Clad1 are: ΔClad1% is about - 0.08, ΦClad1 is about 12.5μm The parameter of the second cladding layer Clad2 is: ΔClad2% is about 0.18, ΦClad2 is about 18.1μm The parameter of the third cladding layer Clad3 is: ΔClad3% is about -0.08, ΦClad3 is about The 29.0 μm ...

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