BENDING-RESISTANT LARGE CORE DIAMETER HIGH NUMERICAL APERTURE MULTIMODE FIBER

摘要

multi-mode optical fiber having a kind of warp-resistant large-diameter high numerical aperture of the present invention, the core and It includes a cladding to coat the core. The radius R1 is 28~50 core, the core refractive index section indicates a parabolic distribution index is 1.9 to 2.2, and the maximum relative refractive index difference [Delta] 1% to 2.5% 1.9% MAX. Cladding the core is located outside the inner cladding and / or a depressed inner cladding to the outside from the inside, it consists of outer cladding. The inner cladding radius R2 is 28~55 , the relative refractive index difference [Delta] 2% is 0.1% ~0.1%. The depressed inner cladding radius R3 is 28~60 , the relative refractive index difference [Delta] 3% is -0.15% - - 0.8%. A multimode fiber having a large-diameter bending resistance by increasing the numerical aperture of the present invention can be the bandwidth of the multimode optical fiber and the aperture, the light collection function was significantly improved let the optical fibers, LED light source and the coupling much easier. In addition to lower significantly even macro bending loss of the optical fiber, have improved bending resistance performance of optical fiber, optical power transfer performance also strengthened. ;