Multiplexed Transmission Gratings in Dichromated Gelatin Slavich PFG-04 Plates.
- Resource Type
- Article
- Authors
- Villamarín, Ayalid; Atencia, Jesús; Collados, M. Victoria; Quintanilla, Manuel
- Source
- AIP Conference Proceedings. 4/15/2008, Vol. 992 Issue 1, p297-302. 6p. 2 Diagrams, 1 Chart, 5 Graphs.
- Subject
- *GELATIN
*HOLOGRAPHY
*DIFFRACTION gratings
*WAVELENGTHS
*ENVIRONMENTAL engineering
- Language
- ISSN
- 0094-243X
In this work we characterize Slavich PFG-04 dichromated gelatin as holographic recording material to record transmission optical elements. First the behavior of the diffraction efficiency as a function of exposure is studied. The plates were exposed with a green NdYVO4 laser operating at λ = 532 nm (with an output power of 6.00 W). Antihalation plate with high thermal conductivity was used to avoid thermo-mechanical instabilities due to high power laser intensity. The plates were processed following the manufacturer instructions, and they were sealed to protect them from the environment effects. Working in the linear region of diffraction efficiency vs. exposure curve we obtain high diffraction effective efficiencies, about 100% excluding reflection losses. Afterwards multiplexed gratings with different periods are recorded sequentially in the same plate, in order to determinate the dynamic range of the material. We obtained diffraction efficiencies higher than 80% in multiplexed gratings due to a wide dynamic range. This allow us to find an adequate exposure to obtain diffractive index modulation that gives diffraction effective efficiencies about 100% for selected wavelengths different from the recording one. Making use of those effects we had constructed holographic elements at 532 nm radiation that operate with maximum efficiency to 800 nm radiation from femtosecond laser [ABSTRACT FROM AUTHOR]