Phase coding for holographic memory using a deformable membrane mirror

Frederic Gonte; Rene Daendliker

doi:10.1117/12.454727

1 February 2002 Phase coding for holographic memory using a deformable membrane mirror

Frederic Gonte, Rene Daendliker

Proceedings Volume 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III; (2002) https://doi.org/10.1117/12.454727
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Phase multiplexing for recording holograms is usually made with the help of digital Hadamard matrices, which have the particularity to be mutually orthogonal. We propose a phase coding for multiplexed holographic memories where the reference uses orthogonal Zernike polynomials generated with the help of a deformable membrane mirror. This membrane mirror is made of silicon nitride and coated with aluminum. It is fifteen millimeters large, less than a micrometer thick and electrostatically activated by thirty-seven electrodes disposed hexagonally. The first fifteen Zernike modes can be efficiently generated by this configuration of electrodes, which allows writing holograms for each of these modes without cross talk. The Zernike modes are measured with the help of a Shack-Hartmann sensor. The pages of data are composed by an LCD spatial light modulator (LCTV with 640x480 pixels) and undergo an optical Fourier transform before being holographically recorded in a photorefractive crystal (Iron doped lithium-niobate) with the phase coded reference beam. The deformable membrane mirror has a frequency response of up to 1 kHz, and therefore the pages of data can be retrieved up to this speed, if the receiving CCD camera is fast enough. Theoretical considerations and experimental results will be presented.

Citation Download Citation

Frederic Gonte and Rene Daendliker "Phase coding for holographic memory using a deformable membrane mirror", Proc. SPIE 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III, (1 February 2002); https://doi.org/10.1117/12.454727

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
9 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Mirrors

Holograms

Holography

Electrodes

Multiplexing

Deformable mirrors

Wavefront sensors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years