Photonic crystal waveguides are a common application of photonic crystals that are used for realizing integrated optics. Chirping in photonic crystal waveguides is studied for controlled dispersion and optimization of coupling. We will here study the chirped photonic crystal tapers and observe their transmission characteristics. This would result in low-loss coupling between fiber and photonic crystal waveguide and compactness of photonic integrated circuits. The numerical results obtained by FDTD and PWE methods validate the application of chirped photonic crystal tapers for optimized coupling. The coupling efficiency is increased for frequencies that arise in the band gap as predicted using 2D FDTD simulations.
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