Optical coupling method and an optical transmitting and receiving device

Plastic optical fiber 11 having a core 12 and cladding 13. Cladding 13 includes an outer cladding 14 and the inner clad 15. The refractive index of the core 12 is made continuously increases toward the center. Refractive index of the inner cladding 15 is equal to the minimum value of the refractive index of the core 12, the refractive index of the outer cladding 14 is smaller than the refractive index of the inner cladding 15. To reduce the transmission loss between the plastic optical fiber 11 and the light emitting device or a light receiving device, and the outer diameter d2 of the diameter d1 and the inner clad 15 of the core 12, 100 (μm) ≦ d1 ≦ 700 (μm) 200 (μm) ≦ d2 ≦ 1000 (μm) d1

Keywords:

• Core (optical fiber)
• Graded-index fiber
• Refractive index
• Cladding (metalworking)
• All-silica fiber
• Cladding (fiber optics)
• Step-index profile
• Plastic optical fiber
• Optics
• Materials science

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