| Autor: |
Maring, D. B., Tavlykaev, R. F., Ramaswamy, R. V., Kostritskii, S. M. |
| Zdroj: |
Journal of the Optical Society of America B: Optical Physics; July 2002, Vol. 19 Issue: 7 p1575-1581, 7p |
| Abstrakt: |
The issue of waveguide instability in LiTaO_3 is addressed. Changes in refractive index over time were monitored and used to compare the stability of waveguides fabricated by proton exchange, annealed proton exchange, Ti indiffusion, and Zn indiffusion. As opposed to waveguide formation in LiNbO_3, all processes were found to produce unstable waveguides in LiTaO_3 crystals. It was concluded, therefore, that to eliminate completely the instability of waveguides fabricated in LiTaO_3 by using common fabrication techniques better growth procedures for this crystal may be necessary. Because of its extremely high melting point, current growth technology results in Li-deficient crystals that likely have a large number of defect sites and high strain values. |
| Databáze: |
Supplemental Index |
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