Multi-core fiber with low crosstalk between cores
A multi-core optical fiber and optical fiber technology, which is applied in the direction of multi-core optical fiber, cladding optical fiber, optical waveguide light guide, etc., to achieve the effect of low inter-core crosstalk, small bending loss and broad application prospects
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Embodiment 1
[0020] A multi-core optical fiber with low crosstalk between cores is characterized in that it includes a central core 1, an annular groove structure I surrounding the central core, and six outer cores 2- 7. Annular trench structures II and III surrounding the six outer cores respectively, covering the central core, six outer cores, and the cladding of trench structures I, II and III.
[0021] Further, the central core 1 and the six outer cores 2-7 have the same positive effective refractive index difference (relative to the cladding refractive index) Δ1, and the value of Δ1 is 0.003. The cladding refractive index was set to 1.444.
[0022] Further, the annular groove structure I surrounding the core has a relatively low negative effective refractive index difference (relative to the cladding refractive index) Δ2, and the value of Δ2 is -0.002. The annular groove structures II and III surrounding the six outer cores and adjacent outer cores have different refractive index dif...
Embodiment 2
[0026] A multi-core optical fiber with low crosstalk between cores is characterized in that it includes a central core 1, an annular groove structure I surrounding the central core, and six outer cores 2- 7. Annular trench structures II and III surrounding the six outer cores respectively, covering the central core, six outer cores, and the cladding of trench structures I, II and III.
[0027] Further, the central core 1 and the six outer cores 2-7 have the same positive effective refractive index difference (relative to the cladding refractive index) Δ1, and the value of Δ1 is 0.0035. The cladding refractive index was set to 1.45.
[0028] Further, the annular groove structure I surrounding the core has a relatively low negative effective refractive index difference (relative to the cladding refractive index) Δ2, and the value of Δ2 is -0.0025. The ring-shaped groove structures II and III surrounding the six outer cores and adjacent outer cores have different refractive inde...
Embodiment 3
[0032] A multi-core optical fiber with low crosstalk between cores is characterized in that it includes a central core 1, an annular groove structure I surrounding the central core, and six outer cores 2- 7. Annular trench structures II and III surrounding the six outer cores respectively, covering the central core, six outer cores, and the cladding of trench structures I, II and III.
[0033] Further, the central core 1 and the six outer cores 2-7 have the same positive effective refractive index difference (relative to the cladding refractive index) Δ1, and the value of Δ1 is 0.0035. The cladding refractive index was set to 1.444.
[0034]Further, the annular groove structure I surrounding the core has a relatively low negative effective refractive index difference (relative to the cladding refractive index) Δ2, and the value of Δ2 is -0.0028. The ring-shaped groove structures II and III surrounding the six outer cores and adjacent outer cores have different refractive inde...
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