Abstract
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.
Highlights
Exploring 2000 nm transmission window in optical communication system is one of important solutions to increase the bandwidth
We optimize the following apodization profiles in which we consider the bandwidth to be the effective element as group delay ripple (GDR)
With the best optimized apodization profiles, the GDR is reduced to the minimum extent. These results show that our target to design a chirped fiber Bragg gratings (CFBGs) that can become the Chromatic Dispersion Compensator (CDC) with optimum performance has been achieved
Summary
Exploring 2000 nm transmission window in optical communication system is one of important solutions to increase the bandwidth. To explore this transmission window, several measures need to be taken in optimizing dispersion compensation for this window. The Group Velocity Dispersion (GVD) of HC-PCF can be compensated at a given wavelength by scaling the fiber dimensions. The range of zero dispersion wavelengths is very small. One of the methods to compensate HC-PCF’s GVD is to use apodized Chirped Fiber Bragg Gratings (CFBG) [2].
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