Abstract

We propose and numerically demonstrate a polarization-independent Fabry–Perot interferometer (PI-FPI) based on the self-collimation effect in a hole-type silicon photonic crystal (PhC). By use of the polarization peak matching method, a resonance frequency of the transverse-electric modes can equal that of the transverse-magnetic modes in the PI-FPI, although the transmission spectra are quite polarization dependent due to birefringence of the PhC. For the operating wavelength of $1550\mathrm{nm}$, the PI free spectral range of the PI-FPI is up to $32.3\mathrm{nm}$, which nearly covers the whole optical communication C-band window. With its small dimensions, simple structure, and silicon-based material, this PI-FPI may play an important role in photonic integrated circuits.

© 2010 Optical Society of America

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