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

Volume

15

Issue

7

fYear

2003

fDate

7/1/2003 12:00:00 AM

Firstpage

921

Lastpage

923

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.813419

Filename

1206762