CTS-Session-01-Basic - Session Session 01 Fundamental Law...

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ession 01 LT/CTS-01/1009 1 of 25 Session 01 Fundamental Law of Optics
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ain Reference: Session 01 References LT/CTS-01/1009 2 of 25 Main Reference: Chapter 1, 2, 3
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Light normally goes in straight lines but lenses and mirrors can deflect it. It was proven that (Wheeler) that light can go around corners. Light Propagation LT/CTS-01/1009 3 of 25 Total internal reflections can guide light along a glass rod. An optical fiber guides light in a manner similar to a very thin glass rod. Optical fiber can guide it around corners.
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Light Propagation LT/CTS-01/1009 4 of 25
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Characteristics of Fiber Optical Fiber evolved from devices developed to guide light which normally go in straight lines. In some cases or applications, lights must go around corners. Light phenomenon called total internal reflections can LT/CTS-01/1009 5 of 25 confine light inside transparent material and guide along the material. A very thin glass rod is called an optical fiber can guide light. Total reflection occurs when light travelling in one medium tries to enter a medium with lower refractive index.
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Coating fiber with certain material resulted in a cladded fiber. Cladding is protecting the core fiber with transparent material of lower refractive index. Clad fibers were the key development in making Characteristics of Fiber LT/CTS-01/1009 6 of 25 fiber optic suitable for practical application. Invention of laser stimulated interest in optical communications. Optical fibers have very high bandwidth. Glass fibers are inherently strong allowing their use
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CTS-Session-01-Basic - Session Session 01 Fundamental Law...

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