title: Electrically tunable photonic true-time-delay line.
abstract: We present a new application of the acousto-optic superlattice modulation of a fiber Bragg grating based on the dynamic phase and group delay properties of this fiber-optic component. We demonstrate a tunable photonic true-time-delay line based on the group delay change of the light reflected from the grating sidebands. The delay is electrically tuned by adjusting the voltage applied to a piezoelectric transducer that generates the acoustic wave propagating along the grating. In our experiments, a true-time delay of 400 ps is continuously adjusted (300 ps within the 3 dB amplitude range of the first sideband), using a 12 cm long uniform grating.
authors: Centro de Investigaciones en Optica, Loma del Bosque 115, Col. Lomas del Campestre, 37150, León, Gto, México. yuri@cio.mx
authors: Yuri O
authors: YO
authors: Barmenkov
authors: José Luis
authors: JL
authors: Cruz
authors: Antonio
authors: A
authors: Díez
authors: Miguel V
authors: MV
authors: Andrés
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008872:Microwaves; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation; D013685:Telecommunications / Q000295:instrumentation*; D013997:Time Factors; D014159:Transducers