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
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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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