Solc filtering characteristics in a periodically poled Ti:LiNbO3 waveguide

We have analyzed the wavelength filtering characteristics in a periodically poled Ti:LiNbO
₃
(TkPPLN) waveguide depending on wave-guiding mode. In single-mode guiding condition, we have observed a single wavelength filtering which has about a 0.21 nm bandwidth. We also have observed a dual wavelength filtering in the case of multi-mode guiding condition.