Abstract
Optical fibers are used to transmit the light signal in optical communication system. When the light pulses propagates down the fiber, the pulses spreading takes place, and this phenomenon is called Pulse Dispersion. Dispersion is the main factor which affects the performance of fiber in optical fiber communication system. Dispersion can be compensated by many ways. Dispersion compensation by FBG (fiber bragg grating) is studied in this paper. Dispersion compensation by FBG along EDFA plays a very important role in dispersion compensation. When FBG is used after EDFAÂ at transmitter side (before fiber)in single channel optical communication system then it gives better performance (less BER) as compare to when FBG used after EDFA at receiver end (after fiber). In this paper performance of system is investigated by using FBG after EDFA at both transmitter side (before the fiber) and receiver side (after the fiber). For 50km BER reduces from 1.28559e-111 (FBG after EDFA at receiver side) to 9.57499e-201 (FBG after EDFA at transmitter side).
Highlights
Optical fiber is used in fiber-optic communication to transmit data in form of light pulses with higher rates over long distances as compare to other form of communication
Dispersion is the main factor which affects the performance of fiber in optical fiber communication
Fiber Bragg Grating (FBG) in optical communication system uses as gain flatteners [4], highly selective filters for channel selection in dense WDM systems [5],filters[6], and dispersion compensator [7].FBGs has many advantages as compare to Dispersion compensating fiber (DCF)
Summary
Optical fiber is used in fiber-optic communication to transmit data in form of light pulses with higher rates over long distances as compare to other form of communication. DCF are bulky [1] and by using these fibers nonlinear affects [2], cost of optical system [2], and insertion losses increases [4]. FBGs in optical communication system uses as gain flatteners [4], highly selective filters for channel selection in dense WDM systems [5],filters[6], and dispersion compensator [7].FBGs has many advantages as compare to DCF. In the third section of this paper the performance (Minimum BER) of two systems (FBG before EDFA (at transmitter end before the fiber) and FBG before EDFA (at receiver end after the fiber) in the optical transmission system) is investigated by plotting the graph between input power and BER. In fourth section performance is investigated by plotting the graph between FBG length and BER for two systems
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