High-quality-factor filter based on a photonic crystal ring resonator for wavelength division multiplexing applications

Abstract

We investigate the properties of ring resonators that are supported by a two-dimensional photonic crystal waveguide. The proposed structure composed of a photonic crystal ring resonator (PCRR) with four scatters can really function as a wavelength division multiplexer. The significance of the design is that the output waveguide is perpendicular to the ring resonator. We numerically demonstrate that the proposed four-channel PCRR device with 3 x 3 inner dielectric rods can provide a transmission efficiency larger than 92%, a quality factor higher than 3800, and crosstalk of less than -32 dB.

New design of a triplexer using ring resonator integrated with directional coupler based on photonic crystals

“…Since the resonances of a ring resonator occur periodically on the frequency scale forming a comb spectrum, one can select more resonators with fractionally different parameters so that every peak can be selected. Thus far, several photonic crystal ring resonator (PCRR) has been demonstrated by using a two-dimensional (2D) PC waveguide with dielectric rods in a square lattice [5][6][7] . Such PCRRs have been discussed in different inner-ring radius, such as 2 × 2, 3 × 3, and 4 × 4.…”