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Digital polarization holograms with defined magnitude and orientation of each pixel's birefringence

: Fratz, M.; Giel, D.M.; Fischer, P.

Reprint urn:nbn:de:0011-n-939854 (237 KByte PDF)
MD5 Fingerprint: 80c9eaf25cc3428bd547b6f4a0d97fe2
Erstellt am: 7.5.2009

Optics Letters 34 (2009), Nr.8, S.1270-1272
ISSN: 0146-9592
ISSN: 1539-4794
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IPM ()
holography; diffractive optics

A new form of digital polarization holography is demonstrated that permits both the amplitude and the phase of a diffracted beam to be independently controlled. This permits two independent intensity images to be stored in the same hologram. To fabricate the holograms, a birefringence with defined retardance and orientation of the fast axis is recorded into a photopolymer film. The holograms are selectively read out by choosing the polarization state of the read beam. Polarization holograms of this kind increase the data density in holographic data storage and allow higher quality diffractive optical elements to be written.