Abstract
Chromatic dispersion is a critical factor that limits the quality of transmitted optical signal in high speed fiber optic communication systems. Chromatic dispersion occurs due to the propagation delay spread of different spectral components of the transmitted signal. This leads to the pulse broadening of transmitted signal. In order to operate the fiber optic communication system with a sufficiently low bit error rate and to minimize the performance degradation caused by pulse distortion and broadening, dispersion compensation is needed. The purpose of this project is to compensate the chromatic dispersion using fiber Bragg grating and optical phase conjugation techniques. Simulation results will be obtained using OPTSIM software version 5.3. Effect of chromatic dispersion in an optical fiber link was analyzed. Simulation using Fiber Bragg grating by varying its grating period and linear chirp coefficient was obtained.
Highlights
Fiber optic communication is a method of transmitting information from one place to another by sending light through an optical fiber
In order to remove the spreading of optical pulses, the dispersion compensation is the most important feature required in optical fiber communication system
Dispersion compensating fiber [3] (DCF) have high attenuation and high insertion loss [4]. Due to these disadvantages DCF is replaced by Fiber Bragg Grating (FBG) and Optical Phase Conjugator (OPC)
Summary
Fiber optic communication is a method of transmitting information from one place to another by sending light through an optical fiber. When different wavelengths of light pulses are launched into an optical fiber, these pulses will travelled at different speeds due to the variation of refractive index with wavelength These light waves tend to get spread out in time after traveling some distance in the optical fiber and this is continued throughout the length of the fiber. This phenomenon of broadening of pulse width is called dispersion. Each pulse broadens and overlap with its neighbors eventually becoming indistinguishable at the receiver input This effect is known as inter symbol interference. In order to remove the spreading of optical pulses, the dispersion compensation is the most important feature required in optical fiber communication system
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