title: Terahertz-bandwidth photonic fractional Hilbert transformer based on a phase-shifted waveguide Bragg grating on silicon.
abstract: We propose and experimentally demonstrate the first THz bandwidth on-chip photonic fractional Hilbert transformer. The reported design uses a novel approach, based on a uniform and nonapodized single phase-shifted integrated waveguide Bragg grating on silicon, where the fractional order P can be engineered by simply varying the effective index modulation δn. Experimental results for P=1.5 show very low processing error for a broad range of pulse bandwidths between 77 GHz and 2.07 THz, corresponding to a time-bandwidth product as high as 27.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Burla
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.forename: Luis Romero
authors.initials: LR
authors.lastname: Cortés
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.forename: María Rosario
authors.initials: MR
authors.lastname: Fernández-Ruiz
authors.forename: Lukas
authors.initials: L
authors.lastname: Chrostowski
authors.forename: José
authors.initials: J
authors.lastname: Azaña