title: Chip-based Brillouin radio frequency photonic phase shifter and wideband time delay.
abstract: We report a chip-based true-time-delay unit based on stimulated Brillouin scattering that uses an on-off Brillouin gain of 52 dB to enable 4 ns delay over a bandwidth of 100 MHz and a phase shift of ∼200°. To verify these operations, we use a two-tap microwave filter configuration and observed changes in the free spectral range of the filter and shift in the spectrum of the filter. The realization of these functionalities on chip-scale devices is critical for phased-array antennas, multibeam satellites, delay lines, arbitrary waveform generation, and reconfigurable microwave photonic filters.
authors.forename: Iman
authors.initials: I
authors.lastname: Aryanfar
authors.forename: David
authors.initials: D
authors.lastname: Marpaung
authors.forename: Amol
authors.initials: A
authors.lastname: Choudhary
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Khu
authors.initials: K
authors.lastname: Vu
authors.forename: Duk-Yong
authors.initials: DY
authors.lastname: Choi
authors.forename: Pan
authors.initials: P
authors.lastname: Ma
authors.forename: Stephen
authors.initials: S
authors.lastname: Madden
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton