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Unit 10 Exercise 1

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1. Forward biased LED-a semiconductor device that emits a narrow spectrum of light. 2. Incoherent Light- light in which the electric and magnetic fields of photons are completely random in orientation 3. Laser- acronym for light amplification by stimulated emission of radiation 4. Output pattern-the pattern of light produced in fiber optic that translate in the data 5. Output power – the amount of light produced by a fiber optic device 6. Modulation speed- the speed of which data is transferred over light 7. Core diameter mismatch- occurs when there is a difference in the core diameter of two optic fibers. 8. Current- the flow of electrons in a conductor 9. PIN photodiode- alight sensitive diode that conducts current in one direction only 10. Avalanche photodiode- is a highly sensitive semiconductor electronic device that exploits the photoelectric effect to convert light to electricity. 11. Responsivity-the ratio of a detector output to input usually measured in unit of amperes per watt 12. Optical subassembly- the portion of a fiber optic receiver that guides light from the optical fiber to the photodiode 13. Dynamic range- the difference between the maximum and minimum optical input power that an optical receiver can accept 14. Operating wavelength- the wavelength at which a fiber optic receiver is designed to operate 15. Fiber optic couple- a device that connect two piece of fiber for the purpose of extent the cable or fixing a broken cable 16. Optomechanical switch- produces different optical paths from one light source 17. Optical attenuator- reduces the intensity of light waves usually so that the power is within the capacity of the detector. 18. Optical isolator- a component used to block out reflected and other unwanted light 19. Wavelength division multiplexing- a method of carrying multiple channel through a fiber at the same time where by signals within a small spectral range are transmitted at different wavelength thought the same optical fiber 20. Passive optical network- is a telecommunications network that uses point-to-multipoint fiber to the premises in which unpowered optical splitters are used 21. FTTH- fiber to the house 22. FTTB fiber to the building 23. FTTC- fiber to the curb 24. FTTN- fiber to the node 25. Feeder cable- a voice backbone cable that runs from equipment room to the telecommunication room 26. Distribution cable- an optical fiber cable used behind the shelf of optical fiber patch panel 27. Drop point- it is the point where signal began to degrade to the of being unsalable 28. Local convergence point-serve as an interface between a telecommunication provider and an individual 29. Network access point-was a public network exchange facility where ISP was connected with one another in a peering arrangement 30. Network interface device- an component that function is a physical connection to a network

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