[OPTICAL REVIEW Vol. 11, No. 1 (2004) 48-54]
© 2004 The Optical Society of Japan
Contribution of Absorptive and Refractive Gratings to Mixed Holograms Using Xanthene-Dye-Doped Films
Tsutomu SATO, Hirofumi FUJIWARA and Kazuo NAKAGAWA
Department of Materials Science and Engineering, Muroran Institute of Technology, 27-1 Mizumoto, Muroran, 050-8585 Japan
(Received June 13, 2003; Accepted October 20, 2003)
The contribution of absorptive and refractive gratings to a mixed hologram is investigated by means of two-wave coupling technique by moving a hologram. Polyvinyl alcohol films doped with xanthene-dyes such as erythrosin B, eosin Y, uranin and fluorescein which absorb an argon-ion laser light of 488 nm and 515 nm are used as hologram-recording materials in our experiment. A simple model of the two-level one-step photo-bleaching well explains the growth of an absorptive grating and the refractive index and also the working wavelength dependence of growth of the refractive grating in the xanthene-dye-doped films.
Key words: mixed hologram, phase of diffracted wave, absorptive grating, refractive grating, two-wave coupling by moving hologram, xanthene-dyes