Holographic recording diffraction gratings in BB640 photographic emulsions with femtosecond pulses in infrared region

Antonio Fimia; Pablo Acebal; Salvador Blaya; Luis Carretero; Roque F. Madrigal; Angel Murciano; Jose Neftalí

doi:10.1117/12.887024

11 May 2011 Holographic recording diffraction gratings in BB640 photographic emulsions with femtosecond pulses in infrared region

Antonio Fimia, Pablo Acebal, Salvador Blaya, Luis Carretero, Roque F. Madrigal, Angel Murciano, Jose Neftalí

Author Affiliations +

Proceedings Volume 8074, Holography: Advances and Modern Trends II; 80740D (2011) https://doi.org/10.1117/12.887024
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

Silver halide materials have occupied an important place in the recording of images. The reason is mainly given by the high sensitivity of the recording medium, thus permitting the use of minimal levels light and hence easing the stability problems of apparatus and the need for high powered laser equipment. When the film is exposed in a holographic process a latent image of a diffraction grating is formed. The developing solution reduces exposed silver halide grains to silver at a higher rate than the unexposed grains. Among the commercial emulsions, recently good results have been reported in BB-640 photographic emulsions, since in this work we present the experimental results related to the response of this emulsion to the interference of pulsed Gaussian beams. For this, diffraction gratings were recorded by the interference of pulsed Gaussian beams with 120 fs of width, 76 MHz of frequency repetition and central wavelength of 790 nm, where the transmittance of this emulsion is higher than 99%. As a result, diffraction efficiencies up to 30% were obtained with low sensitivities due to the low absorption and grain size (18 - 20nm). The thickness of the photographic emulsions and the bleached process has been analyzed and the sensitivity has been optimized with D8 developer.

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Antonio Fimia, Pablo Acebal, Salvador Blaya, Luis Carretero, Roque F. Madrigal, Angel Murciano, and Jose Neftalí "Holographic recording diffraction gratings in BB640 photographic emulsions with femtosecond pulses in infrared region", Proc. SPIE 8074, Holography: Advances and Modern Trends II, 80740D (11 May 2011); https://doi.org/10.1117/12.887024

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