Fast and wide-range continuously tunable Šolc-type filter based on periodically poled LiNbO3

We present a fast and wide-range continuously tunable Šolc-type filter based on periodically poled LiNbO₃ (PPLN) in this paper. The filter is formed in PPLN by applying a biased dc electric field along the y-axis, and the tuning of a transmitted central wavelength is realized by applying another dc electric field along the z-axis. The numerical results demonstrate that the tuning range covers as much as 16 nm, and the dependence of the transmitted central wavelength shift on the control electric field, shows a nearly linear relation with a tuning rate of 0.95 kV/mm per nm. PACS 42.65.-k; 78.20.Jq; 42.79.Ci