Bulg. J. Phys. vol.17 no.4 (1990), pp. 340-345


Optical Waveguides in LiTaO3

V.V. Atuchin, C.C. Ziling
Institute of Semiconductor Physics, Siberian Branch of the USSR Academy of Sciences, 630090, Novosibirsk, 90, USSR
Abstract. The optical properties of waveguide layers produced by Ti, Zr or Hf dif?fusion into LiTaO3 have been studied. A model of mass transport in Ti:LiTaO3 system taking into account the prolonged existence of Ti source on waveguide surface has been proposed and confirmed by experiment. A method for controlling the Li/Ta ratio in LiTaO3 crystals by birefringence measuring has been developed. The depen?dence of Ti:LiNbO3 and LiTaO3 waveguide characteristics on crystal stoichiometry has been found and explained.

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