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One-Dimensional Photonic Crystal-Based Multichannel Filters Using Binary Phase-Only Sampling Approach

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5 Author(s)
Xi-Hua Zou ; Southwest Jiaotong Univ., Chengdu ; Wei Pan ; Bin Luo ; Wei-Li Zhang
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For one-dimensional (1-D) photonic crystals, the amplitude reversal in refractive index profile is defined as an equivalent pi phase shift. With these defined pi phase shifts, the binary phase-only sampling approach can be implemented to design 1-D photonic crystal-based multichannel filters. Such filters exhibit high-count channels and excellent channel uniformity, which is identical with the phenomena obtained in sampled fiber Bragg gratings (SFBGs). Simulations of a nine-channel filter are given out and the distribution of reflection peaks is consistent with that of SFBGs. Then, the impact of structural parameters on filtering characteristics (especially the peak-trough contrast ratio) is discussed, such as optical length of unit cell, optical thickness ratio of alternate dielectric layers, and apodization technique.

Published in:

Journal of Lightwave Technology  (Volume:25 ,  Issue: 9 )