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A tunable photonic RF notch filter based on opto‐VLSI technology
Author(s) -
Zheng Rong,
Alameh Kamal E.,
Wang Zhenglin
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21586
Subject(s) - band stop filter , very large scale integration , filter (signal processing) , broadband , photonics , microwave , materials science , electronic engineering , optoelectronics , optics , computer science , engineering , low pass filter , electrical engineering , telecommunications , physics
In this paper, we propose a novel tunable transversal photonic RF notch filter based on opto‐VLSI technology. By using an array of fiber Bragg gratings (FBGs) in conjunction with an opto‐VLSI processor, the broadband light source can be spectrally sliced and attenuated, hence realizing a two‐tap RF notch filter with stepwise true‐time delays and variable weights. In addition, the free spectral frequency and notch depth of the RF notch filter can be tuned by driving the opto‐VLSI processor with optimized phase‐only holograms. We experimentally demonstrate the proposed tunable RF notch filter structure and the results show that a notch depth greater than 40 dB can be attained. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1011–1015, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21586