Why needed cladding in optical fiber?

Why needed cladding in optical fiber?  :  Today we will talk on a topic which is considered to be the biggest change in the field of communi

Optical Fibers Fundamentals

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The FOA Reference For Fiber Optics - Total Internal Reflection In Optical Fiber

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Reference Guide to Coating Materials for Silica Optical Fibers - Fiberoptics Technology Inc.

What is the function of cladding in optical fibre? - Quora

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The FOA Reference For Fiber Optics - Optical Fiber

Why is the core refractive index greater than the cladding in fiber optics? - Quora

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Why must cladding have a low refractive index compared to the core material in optical fibres? - Quora

Terms used in Fibre Optic Cable