Automatic Resonance Alignment of High-Order Microring Filters

Author

Mak, Jason C. C. ; Sacher, Wesley D. ; Tianyuan Xue ; Mikkelsen, Jared C. ; Zheng Yong ; Poon, Joyce K. S.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

11

Abstract

Automatic resonance alignment tuning is performed in high-order series coupled microring filters using a feedback system. By inputting only a reference wavelength, the filter transmission is maximized on resonance, passband ripples are dramatically reduced, and the passband becomes centered at the reference. The method is tested on fifth-order microring filters fabricated in a standard silicon photonics foundry process. Repeatable tuning is demonstrated for filters on multiple dies from the wafer and for arbitrary reference wavelengths within the free spectral range of the microrings.

Keywords

elemental semiconductors; integrated optics; micro-optics; optical fabrication; optical filters; optical testing; optical tuning; silicon; automatic resonance alignment; feedback system; filter transmission; free spectral range; high-order series coupled microring filters; reference wavelength; resonance passband ripples; standard silicon photonics foundry process; Heating; Optical waveguides; Optimization; Passband; Photonics; Silicon; Tuning; Microring resonators; feedback control; integrated optics; silicon photonics;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2015.2479939

Filename

7272039