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We present recent implementations of microwave photonic filters using the following two technologies: InP-based MDR (microdisk resonator) on and coupled to a nanophotonic SOI waveguide and dynamic Brillouin gratings (DBGs) in polarization maintaining fibers (PMF). Quasi-linear and continuously tunable ∼360° phase shifts have been experimentally obtained when considering radiofrequencies greater than...
Stationary and localized Brillouin dynamic gratings are generated using phase modulation of both pump waves by a pseudo-random bit sequence. The gratings are applied to long variable delay of pulses and to cm-level distributed sensing.
Recently, all-optical multiplication techniques of the repetition rate of optical pulse trains has been actively searched using a variety of mechanisms, i.e. spectral filtering [1,2], spatial Talbot effects [3,4] and micro-cavity structures [5] since it is believed to be a promising solution for ultrafast transmission in optical communication systems and optical signal processing. We here propose...
We experimentally demonstrate that a novel type of photonic delay line based on movable dynamic grating reflectors generated in polarization maintaining fibers can provide continuously tunable signal delaying for high capacity optical data streams and wide bandwidth microwave signals.
Classical configurations of Brillouin distributed optical fibre sensors show a spatial resolution limited by the phonon lifetime to 1 meter. Novel approaches can substantially overcome this limit through the prior activation of the acoustic wave.
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