Near-stoichiometric Ti-diffused LiNbO(3) strip waveguide doped with Zr(4+).
Opt Lett
; 40(22): 5307-10, 2015 Nov 15.
Article
em En
| MEDLINE
| ID: mdl-26565861
ABSTRACT
We report a near-stoichiometric TiZrLiNbO(3) strip waveguide fabricated from a congruent substrate with a technological process in the following sequence Zr4+-diffusion-doping, diffusion of 8-µm-wide, 100-nm-thick Ti strips, and post-Li-rich vapor transport equilibration. We show that Zr(4+)-doping has little effect on the LiNbO(3) refractive index, and the waveguide is in a near-stoichiometric environment. The waveguide well supports both the TE and TM modes, shows weak polarization dependence, is in single mode at the 1.5 µm wavelength, and has a loss of ≤0.6/0.8 dB/cm for the TE/TM modes. A secondary ion mass spectrometry analysis shows that the Zr(4+)-profile part with a concentration above the threshold of photorefractive damage entirely covers the waveguide, implying that the waveguide would be optical-damage resistant.
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MEDLINE
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En
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Opt Lett
Ano de publicação:
2015
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Article