Title :
Asymmetrically coupled silicon-on-insulator microring resonators for compact add-drop multiplexers
Author :
Vörckel, Andreas ; Mönster, Mathias ; Henschel, Wolfgang ; Bolivar, Peter Haring ; Kurz, Heinrich
Author_Institution :
Inst. fur Halbleitertechnik, Aachen Univ., Germany
fDate :
7/1/2003 12:00:00 AM
Abstract :
We report on improved filter characteristics of microring resonators (MRs) used as add-drop multiplexers for integrated photonic circuits. By introducing an asymmetrical coupling of the signal waveguides to the resonator, a higher throughput attenuation and drop efficiency is attained. The throughput attenuation is the decisive property for the application of microrings in photonic networks since it determines the crosstalk between drop signal and add signal at the throughput channel of an add-drop multiplexer. Experimental results are compared with analytical relations. MRs with a free-spectral range of 24 nm are fabricated on silicon-on-insulator substrates. A crosstalk reduction by 8.8 dB due to asymmetrical coupling is demonstrated.
Keywords :
integrated optics; integrated optoelectronics; micro-optics; multiplexing equipment; optical communication equipment; optical couplers; optical crosstalk; optical fibre networks; optical losses; optical resonators; optical waveguide filters; silicon-on-insulator; wavelength division multiplexing; Si; add signal; asymmetrical coupling; asymmetrically coupled silicon-on-insulator microring resonators; compact add-drop multiplexers; crosstalk reduction; drop efficiency; drop signal; free-spectral range; improved filter characteristics; integrated photonic circuits; photonic networks; signal waveguides; silicon-on-insulator substrates; throughput attenuation; throughput channel; Attenuation; Coupling circuits; Crosstalk; Integrated optics; Multiplexing; Optical resonators; Optical waveguides; Resonator filters; Silicon on insulator technology; Throughput;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.813419
