Broadband true time delay for microwave signal processing, using slow light based on stimulated Brillouin scattering in optical fibers
We experimentally demonstrate a novel technique to process broadband microwave signals, using all-optically tunable true time delay in optical fibers. The configuration to achieve true time delay basically consists of two main stages: photonic RF phase shifter and slow light, based on stimulated Brillouin scattering in fibers. Dispersion properties of fibers are controlled, separately at optical carrier frequency and in the vicinity of microwave signal bandwidth. This way time delay induced within the signal bandwidth can be manipulated to correctly act as true time delay with a proper phase compensation introduced to the optical carrier. We completely analyzed the generated true time delay as a promising solution to feed phased array antenna for radar systems and to develop dynamically reconfigurable microwave photonic filters.
Keywords: Fiber optics and optical communications : Fiber optics ; Fiber optics and optical communications : Nonlinear optics, fibers ; Fourier optics and signal processing : Analog optical signal processing ; Scattering : Scattering, stimulated Brillouin
Record created on 2010-10-12, modified on 2016-08-08