Journal
OPTICS EXPRESS
Volume 18, Issue 21, Pages 22599-22613Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.022599
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Funding
- Swiss National Science Foundation [200020-121860]
- European Union
- Swiss National Science Foundation (SNF) [200020_121860] Funding Source: Swiss National Science Foundation (SNF)
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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. (C) 2010 Optical Society of America
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