Abstract
The variation in transmittance produced when a photopolymer is irradiated with a pulsed laser is analyzed and experimental results obtained when diffraction gratings are stored using pulsed exposure are presented. In either case, the influence of the energy of the irradiation pulse, the number of pulses, and the pulse repetition rate were studied. The photopolymer used was an acrylamide/polyvinyl alcohol dry film with a yellow eosin-thiethanol-amine mixture as a photoinitiator system. The recording of the gratings was performed by use of a holographic copying process. The samples were exposed and holograms recorded with a collimated beam from a frequency-doubled Nd:YAG (532 nm) Q-switched laser. Our initial results show that it is possible to obtain diffraction gratings with a diffraction efficiency of 60% and a refractive index modulation up to 2.8 × 10-3. The energetic sensitivities achieved are close to those obtained with the same material and continuous irradiation without a preprocessing of the gratings.
© 2002 Optical Society of America
Full Article | PDF ArticleMore Like This
Rosa Fuentes, Elena Fernández, Celia García, Augusto Beléndez, and Inmaculada Pascual
Appl. Opt. 48(34) 6553-6557 (2009)
Elena Fernandez, Manuel Perez-Molina, Rosa Fuentes, Manuel Ortuño, Cristian Neipp, Augusto Belendez, and Inmaculada Pascual
Appl. Opt. 52(8) 1581-1590 (2013)
Elena Fernández, Manuel Ortuño, Sergi Gallego, Andrés Márquez, Celia García, Augusto Beléndez, and Inmaculada Pascual
Appl. Opt. 47(25) 4448-4456 (2008)