Optical fibers are constructed with a cylindrical core surrounded by a sheath of cladding material. Common materials used are pure silica ( n ₂ = 1.450) for the cladding and silica doped with germanium ( n ₁ = 1.465) for the core. What is the critical angle for light traveling in the core and reflecting at the interface with the cladding material?

Transcribed Image Text:

M₂ M₁ M₂ M₁

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