Comparison of photorefractive damage effects in LiNbO3, LiTaO3, and Ba1−xSrxTiyNb2−yO6 optical waveguides at 488 nm wavelength
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Photorefractive-induced damage effects at 488 nm wavelength in LiNbO3, LiTaO3, and Ba1-xSrxTiyNb2-yO6(BSTN) optical waveguides are compared for the extraordinary mode of polarization. The damage effects are strongest in LiNbO3and weakest in BSTN. At an input power density of 3000 W/cm2, the output power from passive channel waveguide in LiNbO3is more than 12 dB lower than in BSTN. Optically induced index changes measured using a Fabry-Perot interferometric method show a nonlinear behavior with increasing input intensity for all these materials. For incident power densities greater than 200 W/cm2on the waveguides, the optically induced index-change damage increases at a rate of 2.8 × 10-3cm2/μW in LiNbO3, 4.9 × 10-4cm2/μW in LiTaO3, and 3.1 × 10-4cm2/μW in BSTN. © 1997 American Institute of Physics.
author list (cited authors)
Eknoyan, O., Taylor, H. F., Matous, W., Ottinger, T., & Neurgaonkar, R. R.