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A novel tunable microwave optical notch filter

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2 Author(s)
Ningsi You ; Sch. of Electron. & Inf. Eng., Sydney Univ., NSW, Australia ; Minasian, R.A.

A new topology for a tunable microwave photonic notch filter, which achieves a wide and continuous tuning range of FSR/2, is presented. The novel principle of tuning is based on changing optical variable attenuators only; consequently, a fixed wavelength laser can be used as the optical source. Experimental filter tuning results demonstrate a wide fractional tuning range of 50%, continuous tuning capability, and a notch filter shape that does not change as it is tuned, in very good agreement with predictions

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:49 ,  Issue: 10 )