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Continuously tunable photonic radio-frequency notch filter

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4 Author(s)
Coppinger, F. ; Optoelectron. Circuits & Syst. Lab., California Univ., Los Angeles, CA, USA ; Yegnanarayanan, S. ; Trinh, P.D. ; Jalali, B.

We present a continuously tunable nonrecursive radio-frequency (RF) photonic filter. The filter provides fine tuning through the use of a novel RF phase shifter and coarse tuning using an an optical variable time delay. This architecture permits wide-band continuous tuning of the filter null frequency and is useful in applications such as moving target indication (MTI) in an airborne radar.

Published in:

Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 3 )