Abstract
An optical delay line of coupled resonator optical waveguide (CROW)
compensated by photonic crystal waveguide (PhCW) is proposed. In the structure,
etching the periodic holes around the waveguide of the ring resonator waveguide does
not increase the size of the CROW. Theoretical studies and numerical models indicate
that through careful design, CROW and PhCW exhibit different group velocity
dispersion (GVD) properties at a certain frequency range. Optical signal can not
only be compensated in terms of GVD, but can also be delayed with longer time
period. Due to the propagation mode mismatch of the two structures, optical loss
becomes inevitable.
© 2011 Chinese Optics Letters
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