Correlation between optical and compositional properties of Ti : LiNbO3 channel optical waveguides

Optical, compositional, and structural characterization of titanium-diffuse d LiNbO3 channel waveguides has been performed. The refractive index profil es have been reconstructed from near field measurements using a well-adapte d mathematical approximation. Crystal lattice deformations have been measur ed by x-ray diffraction. Titanium concentration profiles measured by second ary ion mass spectrometry have been correlated to the refractive index prof iles. The correlation between compositional, structural, and optical proper ties is discussed. (C) 2000 American Institute of Physics. [S0021-8979(00)0 5203-8].