Abstract
AbstractA tunable coherent photonic microwave notch filter based on phase‐shifted fiber Bragg grating is proposed. Because of the Yb3+/Al3+ codoped optical fiber between two sub‐FBGs, the optical phase of the delayed signal is linearly and precisely controlled by adjusting the injected pump power at around 980 nm. By changing the optical phase shift inside the filter, notch frequency can be varied continuously keeping its free spectral range. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2409–2411, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23648
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