Abstract
This paper presents a design method of a taper structure for highly
efficient coupling between 1-D photonic crystal coupled resonator optical
waveguides (1-D PC-CROWs) and input straight waveguides. We propose a new
taper structure where not only air hole radius but also waveguide width are
varied linearly in order to adjust the dispersion curves shift. By using the
proposed tapered structure, we can connect each waveguide with high
transmission over wide bandwidth. Our numerical simulation results show that
a transmission of 98% around 1550 nm wavelength in a 6.6 $\mu$m long taper can be obtained with a 42 nm bandwidth.
© 2009 IEEE
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