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Australia Fiber Optic

Fibre Optic Systems(FOS) is a fibre optic supplier & manufacturer in Australia, specialising in fibre optic cords, cables & fibre optic test equipment.

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Australia Fiber Optic

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  1. Presented by – Sandeep Singh

  2. Brief flow ofpresentation • Introduction • What are Optical Fibers? • Structure of opticalfiber • Working principle of opticalfiber • Optical fiber communicationsystem • Advantage / Disadvantage of opticalfiber • Application of opticalfiber • Conclusion

  3. What is Optical Fiber?  An optical fiber is a hair thin cylindrical fiber of glass or any transparent dielectricmedium. • The fiber which are used foroptical communication are wave guides made of transparentdielectrics. • Its function is to guide visible and infrared light over longdistance.

  4. Structure of opticalfiber

  5. Conti… • Core- central tube of very thin size made up of optically transparent dielectric medium andcarries the light form transmitter to receiver. The core diameter can vary from about 5um-100um. • Cladding- outer optical material surrounding the core having reflecting index lower than core. It helps to keep the light within the core throughout the phenomena of total internalreflection. • Buffer Coating- plastic coating that protects thefiber made of silicon rubber. The typical diameter of fiber after coating is250-300um.

  6. Classification of opticalfiber • Optical fiber is classified into two categories based on:- • The number ofmodes- • Single mode fiber(SMF)and • Multi-modefiber(MMF) • 2) The reflectiveindex- • Step index opticalfiber • Graded- index opticalfiber

  7. On basis of number ofmodes:- Single modefiber- • Insinglemodefiberonlyonemodecanpropagatethroughthe • fiber. • It has small core diameter (5um) and high cladding diameter (70um). • Difference between the refractive index of core and claddingis • verysmall. • There is neither dispersion nor degradation therefore it issuitable for long distancecommunication. • The light is passed through the single mode fiber throughlaser diode.

  8. Multi- modefiber • It allows a large number of modesfor • light ray travelling throughit. • The core diameter is 40um andthat of cladding is70um. • The relative refractive index difference is also large thansingle modefiber. • There is signal degradation dueto multimodedispersion. • It is not suitable for long distance communication due to large dispersion and attenuation ofsignal.

  9. On the basis of refractiveindex  There are two type of opticalfiber:- Step index opticalfiber Graded- index opticalfiber

  10. Single Indexfiber:- • Step-index optical fiber-the refractive index of coreand cladding areconstant. • The light ray propagate through it in the form of meridiognal rays which cross the fiber axis duringevery reflection at the core claddingboundary. • Graded IndexFiber:- • In this type of fiber core has a non uniform refractive index that gradually decrease from the center towards the core claddinginterface. • The cladding has a uniform refractiveindex. • The light rays propagate through it in the form ofhelical rays. They never cross the fiberaxis.

  11. Optical FiberCommunication System • Information source- it provide an electrical signal to a transmitter comprising an electricalstage. • Electrical transmitter- It drives an optical source to givean • modulation of the light wavecarrier. • Optical source- It provides the electrical-optical conversion. It may be a semiconductor laser or anLED.

  12. Continue.. • Optical cable- It serve as transmissionmedium. • Optical detector- It is responsible for optical to electrical conversion of data. It may be a photodiodes, phototransistors or photoconductors. • Electrical receiver: It is used for electrical interfacing at the receiver end of the optical link and to perform the signal processing electrically. • Destination: It is the final point at which we receivethe information in the form of electricalsignal.

  13. Advantage of OpticalFiber • Immense bandwidth toutilize • Total electrical isolation in the transmissionmedium • Very low transmissionloss • Small size and lightweight • High signalsecurity • Very low power consumption and wide scopeof system expansionetc.

  14. Conclusion At the last,there are some negatives of using optical fiber communication system in terms of splicing, coupling, set up expenses etc. but it is an un avoidable fact that optical fiber has revolutionized the field of communication. As soon as computers will be capable of processing optical signals, the total arena of communication will be opticalizedimmediately.

  15. Contact us : Address : 25 Gilbert Park Drive, Knoxfield, Victoria 3180 Australia Phone no. -+61435390490 +61 478716543 +61 399001936 Website : https://www.fibreoptic.com.au/

  16. Thankyou…..

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