Optimization of apodized linearly chirped fiber gratings for optical communications (original) (raw)

In this paper, we optimized the apodization profile to improve the dispersion compensation performance of the chirped fiber Bragg gratings (CFBGs). Half tanh half uniform (HTHU), half exponential half uniform (HEHU), and half hamming half uniform (HHHU) apodization profiles were evaluated at 2000 nm wavelength. At this wavelength, Hollow-Core Photonic Crystal Fiber (HC-PCF) will be the targeted fiber for the future implementation. In this work, our aim is to obtain the dispersion compensator design with minimum average group delay ripple (GDR) and maximum Full Width Half Maximum (FWHM) bandwidth. The result shows that the best FWHM bandwidth is obtained by using HTHU profile that is approximately 96.27 %. In term of GDR, all apodization profiles show similar performance.

The performance of Chromatic Dispersion Compensator (CDC) based on optimized CFBG apodization profile is presented. With optimized apodization profile, optimum value of dispersion can be obtained with sufficient operating bandwidth and minimum ripple. The design presents-2995 ps/nm dispersion at around 2019.8 nm center wavelength and 0.675 nm 3-dB bandwidth. Linear region of group delay is 0.57 nm that cover 84% of 3-dB bandwidth.

A fiber bragg grating (FBG) is one of the most important and applicable component in an optical communication system. In this paper, the use of chirped FBG has been studied as a dispersion compensator in an optical communication system. The simulation model of the chirp grating based on the optisystem 7.0 is presented according to the above principle. The simulation results are validated by analyzing the Q-factor, we examined the effect of this component in the data receiver.

Dispersion is the most important factor which determines the data rate and the maximum repeater distance spacing in a fiber optical link. In this paper, the use of chirped FBG has been studied as a dispersion compensator in a 38 km long fiber optic link using NRZ modulation format. For the given optical communication system, it was observed that NRZ modulation format gives a maximum value of Qfactor of 18.3881. The simulation model of the chirp grating is based on the Optisystem 7.0 and is presented according to the above principle.

In this paper, a proposal for analyzing the performance of an optical system by using dispersion compensation fiber (DCF) and linear chirped apodized fiber Bragg grating (FBG) has been put forth. Both systems have three different schemes pre, post and symmetrical. Various parameters used for this analysis are input power, distance & input bit rate. Performance is analyzed in terms of Q factor, Bit Error Rate (BER) and Eye Diagram. It is found that use of FBG as a dispersion compensating element gives better system performance as compared to DCF.