| Popis: |
Quasi-phasematched frequency conversion in LiNbO3 waveguides offers an efficient method for the generation of short wavelength radiation from infrared laser diodes. While different techniques have been used to form the ferroelectric domain grating necessary for quasi-phasematching, the annealed proton exchange (APE) process has been used exclusively to provide waveguide confinement Contradictory measurements of the nonlinear optical properties of proton exchange (PE) and APE-LiNbO3 waveguides have been reported for several years.1,2,3,4,5,6 The d33 coefficient of PE-LiNbO3 has been reported to be between 04,5 and 0.633 the bulk LiNbO3 value. No successful guided wave frequency conversion devices have been fabricated using unannealed PE waveguides. |
