ENERGY LEAKS THROUGH THE OPTICAL BARRIER CREATED BY H-GUIDES( IMPLANTATION IN BATIO3 AND LINBO3 PLANAR WAVE)

The energy leaks through the index barrier created by the proton impla ntation process are put in evidence in planar optical waveguides made in BaTiO3 and LiNbO3 substrates. The selective detection of the light emerging from the guiding region permits to measure the optical attenu ation of che guided wave. The results obtained on mono or twice implan ted LiNbO3 and BaTiO3 waveguides are presented and discussed. It is sh own that the light confinement is better in BaTiO3 than in LiNbO3. (C) 1998 Elsevier Science B.V.