Wavelength filtering characteristics of Solc filter based on Ti:PPLN channel waveguide

• Published in: Optics letters Vol. 32; no. 19; p. 2813
• Main Authors: Lee, Y L, Yu, N E, Kee, C-S, Ko, D-K, Lee, J, Yu, B-A, Shin, W, Eom, T J, Noh, Y-C
• Format: Journal Article
• Language: English
• Published: United States 01.10.2007
• ISSN: 0146-9592; 1539-4794
• DOI: 10.1364/OL.32.002813

We have analyzed the Solc filtering characteristics in a periodically poled Ti:LiNbO3 (Ti:PPLN) multimode waveguide. The single- and dual-wavelength filtering were achieved under the optimized guiding condition for the TEM(00)-like mode and two mode (TEM(00)- and TEM(01)-like mode), respectively. The full width at half-maximum of the filter was about 0.21 nm at both guiding conditions. We found that the origin of two peaks of the dual-wavelength Solc filter in the two-mode guiding condition is the different effective refractive index between the TEM(00)- and TEM(01)-like modes. The wavelength difference of two peaks is about 0.8 nm at room temperature.