New ring resonator configuration using hybrid photonic crystal and conventional waveguide structures.

We propose a new method of realizing ring resonators based on hybrid photonic crystal and conventional waveguide structures. The proposed ring resonator configuration is advantageous compared with general ring resonator structures for its controllability of the quality (Q) factor, free spectral range (FSR), and full width at half maximum (FWHM) over a wide range. We show ring resonator structures based on a single mode waveguide with core and clad refractive indices of 1.5 and 1.465, respectively. A 35mum x 50mum ring resonator has a free spectral range (FSR) of 14.1nm and a quality (Q) factor of 595 with high optical efficiency (92.7%). By decreasing the size of the ring resonator to 35mum x 35mum, the FSR is increased to 19.8nm. Modifying the splitting ratio of the beam splitters permits the Q factor to be increased to 1600.

[1]  W. Henschel,et al.  Asymmetrically coupled silicon-on-insulator microring resonators for compact add-drop multiplexers , 2003, IEEE Photonics Technology Letters.

[2]  Jingbo Cai,et al.  Hybrid integration of conventional waveguide and photonic crystal structures. , 2002, Optics express.

[3]  Jingbo Cai,et al.  Ultracompact high-efficiency polarizing beam splitter with a hybrid photonic crystal and conventional waveguide structure. , 2003, Optics letters.

[4]  S. Chu,et al.  Microring resonator arrays for VLSI photonics , 2000, IEEE Photonics Technology Letters.

[5]  E. R. Thoen,et al.  Ultra-compact Si-SiO2 microring resonator optical channel dropping filters , 1998, IEEE Photonics Technology Letters.

[6]  Shouyuan Shi,et al.  Analysis of splitters for self-collimated beams in planar photonic crystals. , 2004, Optics express.

[7]  Thomas F. Krauss,et al.  Improved 60/spl deg/ bend transmission of submicron-width waveguides defined in two-dimensional photonic crystals , 2002 .

[8]  Larry R. Dalton,et al.  Polymer micro-ring filters and modulators , 2002 .

[9]  G. Bourdon,et al.  Ultralow loss ring resonators using 3.5% index-contrast Ge-doped silica waveguides , 2003, IEEE Photonics Technology Letters.

[10]  T. Kaneko,et al.  An eight-channel add-drop filter using vertically coupled microring resonators over a cross grid , 1999, IEEE Photonics Technology Letters.

[11]  M. Tokushima,et al.  Light propagation in a photonic-crystal-slab line-defect waveguide , 2002 .

[12]  Jean-Pierre Berenger,et al.  A perfectly matched layer for the absorption of electromagnetic waves , 1994 .