Optical Review
Print ISSN : 1340-6000
ISSN-L : 1340-6000
Direct Fabrication Methods of Surface Relief Electro-Optic Gratings in Azo-Polymer Films
Katsuhiro MUNAKATAKenji HARADANobukazu YOSHIKAWAMasahide ITOHShinsuke UMEGAKIToyohiko YATAGAI
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1999 Volume 6 Issue 6 Pages 518-521

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Abstract

Two fabrication methods of surface relief electro-optic (EO) gratings in azo-polymer films are described: surface deformation by a continuous wave laser and laser ablation by a pulse laser. In the fabrication process, the periodic intensity modulation of laser beams is formed by an interference fringe or a phase mask. The surface relief EO grating is fabricated by poling the surface relief grating (SRG) after the SRG fabrication process. The linear dependence of an applied voltage in the modulation efficiency of the first-order diffraction beam is observed. The proposed methods are effective for highly-efficient surface relief EO grating fabrication.

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© 1999 by the Optical Society of Japan
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