LOW-LOSS OPTICAL WAVE-GUIDES IN LITHIUM TANTALATE BY VAPOR DIFFUSION Academic Article uri icon

abstract

  • Planar and channel optical waveguides have been produced in Y-cut LiTaO3 substrates by zinc diffusion from the gaseous phase at 800C. Prism coupler measurements on planar waveguides diffused for 6 h indicate effective index changes of 0.0063 and 0.0033 for TE and TM polarizations, respectively, with effective diffusion depths of 3.5 and 3.9 m for the two polarizations. Losses in channel waveguides at 0.633 m wavelength were 1.00.2 dB/cm for TE polarized fields, as compared with 4.71.0 dB/cm measured on companion samples produced by the conventional Ti indiffusion process at 1150C. Electro-optic modulation has been demonstrated in channel waveguide interferometers produced by this technique. Based on electron microprobe analysis, a surface Zn concentration of 1.31021 cm-3 has been determined.

published proceedings

  • APPLIED PHYSICS LETTERS

altmetric score

  • 3

author list (cited authors)

  • EKNOYAN, O., YOON, D. W., & TAYLOR, H. F.

citation count

  • 16

complete list of authors

  • EKNOYAN, O||YOON, DW||TAYLOR, HF

publication date

  • January 1987