Related Experiment Video
Updated: Jun 14, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Design calculations for directional couplers fabricated by Ti-diffused LiNbO(3) waveguides
Abstract:
Coupling characteristics for designing a LiNbO(3) directional coupler fabricated by Ti diffusion have been investigated with a modified WKB method. The present analysis is verified by comparing the refractive-index change in the Ti-diffused LiNbO(3) waveguide derived from direct measurement and coupling length calculation. Coupling length variations due to refractive-index change, diffusion length waveguide spacing, and wavelength are described. Tolerances in coupling length mismatch and propagation constant differences affecting cross talk of the directional coupler are discussed.
Related Concept Videos
Transmission Line Design Considerations
Bewley Lattice Diagram

