title: On-chip programmable ultra-wideband microwave photonic phase shifter and true time delay unit.
abstract: We proposed and experimentally demonstrated an ultra-broadband on-chip microwave photonic processor that can operate both as RF phase shifter (PS) and true-time-delay (TTD) line, with continuous tuning. The processor is based on a silicon dual-phase-shifted waveguide Bragg grating (DPS-WBG) realized with a CMOS compatible process. We experimentally demonstrated the generation of delay up to 19.4 ps over 10 GHz instantaneous bandwidth and a phase shift of approximately 160° over the bandwidth 22-29 GHz. The available RF measurement setup ultimately limits the phase shifting demonstration as the device is capable of providing up to 300° phase shift for RF frequencies over a record bandwidth approaching 1 THz.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Burla
authors.forename: Luis Romero
authors.initials: LR
authors.lastname: Cortés
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.forename: Lukas
authors.initials: L
authors.lastname: Chrostowski
authors.forename: José
authors.initials: J
authors.lastname: Azaña