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Compact tunable microwave filter using retroreflective acousto-optic filtering and delay controls

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Abstract

Programmable broadband rf filters are demonstrated using a compact retroreflective optical design with an acousto-optic tunable filter and a chirped fiber Bragg grating. This design enables fast 34 μs domain analog-mode control of rf filter time delays and weights. Two proof-of-concept filters are demonstrated including a two-tap notch filter with >35  dB notch depth and a four-tap bandpass filter. Both filters have 2–8 GHz tunability and a 34μs reset time.

© 2007 Optical Society of America

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