Open AccessDemonstration of a fast-reconfigurable silicon CMOS optical lattice filter
Author(s) -
Salah Ibrahim,
Nicolas K. Fontaine,
Stevan S. Djordjevic,
Binbin Guan,
Tiehui Su,
Samson Cheung,
Ryan P. Scott,
Andrew Pomerene,
Liberty L. Seaford,
Craig Hill,
Steve Danziger,
Zhi Ding,
K. Okamoto,
S. J. B. Yoo
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.013245
Subject(s) - optics , band pass filter , optical filter , materials science , resonator , band stop filter , free spectral range , control reconfiguration , optoelectronics , cmos , filter (signal processing) , physics , low pass filter , computer science , electrical engineering , engineering , embedded system
We demonstrate a fully-reconfigurable fourth-order optical lattice filter built by cascading identical unit cells consisting of a Mach-Zehnder interferometer (MZI) and a ring resonator. The filter is fabricated using a commercial silicon complementary metal oxide semiconductor (CMOS) process and reconfigured by current injection into p-i-n diodes with a reconfiguration time of less than 10 ns. The experimental results show full control over the single unit cell pole and zero, switching the unit cell transfer function between a notch filter and a bandpass filter, narrowing the notch width down to 400 MHz, and tuning the center wavelength over the full free spectral range (FSR) of 10 GHz. Theoretical and experimental results show tuning dynamics and associated optical losses in the reconfigurable filters. The full-control of each of the four cascaded single unit cells resulted in demonstrations of a number of fourth-order transfer functions. The multimedia experimental data show live tuning and reconfiguration of optical lattice filters.