Open AccessContinuously tunable delay line based on SOI tapered Bragg gratings
Author(s) -
Ivano Giuntoni,
David Stolarek,
Dimitar Kroushkov,
J. Bruns,
Lars Zimmermann,
Bernd Tillack,
K. Petermann
Publication year - 2012
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.20.011241
Subject(s) - silicon on insulator , materials science , optics , fiber bragg grating , gigabit , electron beam lithography , free spectral range , optoelectronics , silicon , physics , resonator , resist , wavelength , layer (electronics) , composite material
The realization of an integrated delay line using tapered Bragg gratings in a drop-filter configuration is presented. The device is fabricated on silicon-on-insulator (SOI) rib waveguides using a Deep-UV 248 nm lithography. The continuous delay tunability is achieved using the thermo-optical effect, showing experimentally that a tuning range of 450 ps can be obtained with a tuning coefficient of -51 ps/°C. Furthermore the system performance is considered, showing that an operation at a bit rate of 25 Gbit/s can be achieved, and could be extended to 80 Gbit/s with the addition of a proper dispersion compensation.