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Laser-Induced Line Patterning of Nonlinear Optical Crystals in Glass

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2 Author(s)
Komatsu, T. ; Dept. of Mater. Sci. & Technol., Nagaoka Univ. of Technol., Nagaoka ; Honma, T.

This paper reports the progress in the patterning of nonlinear optical crystal lines on a glass surface by laser irradiation techniques. Two techniques for the patterning of crystal lines have been developed, i.e., rare-earth atom heat processing and transition metal atom heat processing, in which continuous-wave lasers such as Nd:YAG laser (wavelength: lambda = 1064 nm) are irradiated onto the glasses containing rare-earth ions such as Sm3+ and Dy3+ or transition metal ions such as Ni2+ and Cu2+. The patterning of lines consisting of nonlinear optical crystals such as beta-BaB2O4, SmxBi1- xBO3, (Sr,Ba)Nb2O6, and LiNbO3 has been achieved. It is clarified from the azimuthal dependence of second harmonic intensities and polarized micro-Raman scattering spectra that nonlinear optical crystals in the lines are highly oriented along the laser scanning direction, i.e., the patterning of single-like crystal lines. It is also possible to pattern two-dimensional crystal bending or curved lines by just changing the laser scanning direction, and such bending crystal lines have a potential for optical waveguides.

Published in:

Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:14 ,  Issue: 5 )

Date of Publication:

Sept.-oct. 2008

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