Abstract
Terahertz bandwidth photonic Hilbert transformers are proposed and experimentally demonstrated. The integrated device is fabricated via a direct UV grating writing technique in a silica-on-silicon platform. The photonic Hilbert transformer operates at bandwidths of up to 2 THz () in the telecom band, a 10-fold greater bandwidth than any previously reported experimental approaches. Achieving this performance requires detailed knowledge of the system transfer function of the direct UV grating writing technique; this allows improved linearity and yields terahertz bandwidth Bragg gratings with improved spectral quality. By incorporating a flat-top reflector and Hilbert grating with a waveguide coupler, an ultrawideband all-optical single-sideband filter is demonstrated.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Chaotan Sima, J. C. Gates, H. L. Rogers, P. L. Mennea, C. Holmes, M. N. Zervas, and P. G. R. Smith
Opt. Lett. 38(5) 727-729 (2013)
María R. Fernández-Ruiz, Lixian Wang, Alejandro Carballar, Maurizio Burla, José Azaña, and Sophie LaRochelle
Opt. Lett. 40(1) 41-44 (2015)
Reza Ashrafi and José Azaña
Opt. Lett. 37(13) 2604-2606 (2012)