Spectral analysis in overmodulated holographic reflection gratings recorded with BB640 ultrafine grain emulsion

Pedro Mas-Abellán; Roque Madrigal; A. Fimia

doi:10.1117/12.2179566

8 May 2015 Spectral analysis in overmodulated holographic reflection gratings recorded with BB640 ultrafine grain emulsion

Pedro Mas-Abellán, Roque Madrigal, A. Fimia

Author Affiliations +

Proceedings Volume 9508, Holography: Advances and Modern Trends IV; 950810 (2015) https://doi.org/10.1117/12.2179566
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

Abstract

Silver halide emulsions have been considered one of the most energetic sensitive materials for holographic applications. Nonlinear recording effects on holographic reflection gratings recorded on silver halide emulsions have been studied by different authors obtaining excellent experimental results. In this communication specifically we focused our investigation on the effects of refractive index modulation, trying to get high levels of overmodulation. We studied the influence of the grating thickness on the overmodulation and its effects on the transmission spectra for a wide exposure range by use of two different thickness ultrafine grain emulsion BB640, thin films (6 μm) and thick films (9 μm), exposed to single collimated beams using a red He-Ne laser (wavelength 632.8 nm) with Denisyuk configuration obtaining a spatial frequency of 4990 l/mm recorded on the emulsion. The experimental results show that high overmodulation levels of refractive index could offer some benefits such as high diffraction efficiency (reaching 90 %), increase of grating bandwidth (close to 80 nm), making lighter holograms, or diffraction spectra deformation, transforming the spectrum from sinusoidal to approximation of square shape. Based on these results, we demonstrate that holographic reflection gratings spectra recorded with overmodulation of refractive index is formed by the combination of several non-linear components due to very high overmodulation. This study is the first step to develop a new easy multiplexing technique based on the use of high index modulation reflection gratings.

Citation Download Citation

Pedro Mas-Abellán, Roque Madrigal, and A. Fimia "Spectral analysis in overmodulated holographic reflection gratings recorded with BB640 ultrafine grain emulsion", Proc. SPIE 9508, Holography: Advances and Modern Trends IV, 950810 (8 May 2015); https://doi.org/10.1117/12.2179566

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Diffraction gratings

Holography

Diffraction

Refractive index

Water

Holograms

Modulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years