title: Electronically tunable silicon photonic delay lines.
abstract: Electronically tunable optical true-time delay lines are proposed. The devices utilize the combination of apodised gratings and the free-carrier plasma effect to tune the enhanced delay of silicon waveguides at a fixed wavelength. Three variations of the proposed scheme are studied and compared. The compact and integrable devices can achieve tuning ranges as high as ~660 ps with a loss of < 2.2 dB when operated in the reflection mode of the gratings. A delay of ~40 ps with a loss of < 10 dB and an estimated operation bit rate of ~20 Gb/s can be achieved.
authors.affiliation: Department of Electrical Engineering and Computer Science, University of Central Florida, Orlando, FL 32816, USA.
authors.forename: Saeed
authors.initials: S
authors.lastname: Khan
authors.forename: Mohammad Amin
authors.initials: MA
authors.lastname: Baghban
authors.forename: Sasan
authors.initials: S
authors.lastname: Fathpour