Optical and Structural Properties of Proton-Exchanged Waveguides in Y-Cut ZnO:LiNbO_3

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概要

• 論文の詳細を見る

• Fabrication and characterisation of proton exchanged planar optical waveguides in Y-cut ZnO:LiNbO_3 crystal using adipic acid as proton source are reported in this paper. These waveguides have a linear-step index profile with a surface index increase of 0.138 at the wavelength of 0.633 μm. The activation energy Q and diffusion constant. D_0 for the proton exchange process are characterised optically to be 95.32 KJ/mol and 9.61×10^9 μm^2/h. A critical thickness of about 2 μm for proton exchanged y-cut ZnO:LiNbO_3 waveguides is optically determined in our experiments. Surface damage is observed for those waveguides with layer thickness larger than this critical value. The strains in y-cut waveguides are measured by using double-crystal X-ray symmetric and asymmetric diffraction method. Based on the measured data, an explanation is given for the surface damage occured on y-cut samples.

• 社団法人応用物理学会の論文
• 1996-03-15

著者

• CHONG Tow

  Department of Electrical Engineering, National University of Singapore

• Hou Wei

  Department Of Electrical Engineering National University Of Singapore

• Chong Tow

  Department Of Electrical Engineering National University Of Singapore

• Chong Tow

  Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576

• Hou Wei

  Department of Communication Engineering and Informatics, The University of Electro-Communications

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