Journal Article10.1364/OL.25.001077
Optical computing by a vector holographic memory system.
5
TL;DR: A polarization-modulated reference beam is introduced into holographic recording and successfully performed spatial-frequency filtering and frequency-selective matched filtering and the system is capable of a variety of optical computations, depending on the design of the polarization modulation.
read more
Abstract: We propose what is to our knowledge a novel holographic memory system that is simultaneously applicable to data storage and optical computing. We introduce a polarization-modulated reference beam into holographic recording. A desired spatial-frequency component of an object beam is recorded as a polarization-modulated grating, and the other component is recorded as an intensity-modulated grating. Since the polarization-modulated grating rotates the polarization axis of the incident light by 90°, it is possible to distinguish the desired spatial-frequency component of the retrieved image. Utilizing this property, we have successfully performed spatial-frequency filtering and frequency-selective matched filtering. The system is capable of a variety of optical computations, depending on the design of the polarization modulation.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Secure optical memory system with polarization encryption
TL;DR: A novel secure holographic memory system with polarization encoding that can recover the original polarization state by use of the same mask used in the encryption and decryption with a bacteriorhodopsin film is proposed.
101
Thermally assisted recording of holographic gratings in semicrystalline azobenzene-containing polymers
TL;DR: The thermally assisted recording by use of semicrystalline azopolymers is a promising method for reversible holographic storage.
21
Digital Data Storage and Computing by a Vector Holographic Memory System
TL;DR: By detecting an appropriate polarization component of the diffracted beams, the system has successfully obtained subtraction and addition signals between the two multiplexed pages and would take advantage of the high-density storage, fast transfer rates, and fast processing speeds.
7
Polarization Encoding for Digital Holographic Storage
TL;DR: In this article, the polarization encoding for digital holographic storage was proposed, in which each pixel or bit encodes two orthogonal polarization states, 0 and 90 degrees, corresponding to binary 1 and 0, respectively.
4
Photocontrol of thermally enhanced birefringence in semicrystalline azobenzene-containing polyester films
Jiro Minabe,Katsunori Kawano,Yasunari Nishikata +2 more
- 01 Jan 2002
TL;DR: In this article, the authors examined the film-temperature and the exposure-time dependence of optically induced birefringence in semicrystalline azopolyester films.
References
Polarization holography. 1: A new high-efficiency organic material with reversible photoinduced birefringence.
TL;DR: A new organic material for polarization holographic recording--azo-dye methyl-orange, introduced in polyvinyl alcohol (PVA)--is fabricated and investigated, which makes possible the recording of reversible polarization gratings with diffraction efficiency over 30%.
855
Polarization holography. 3: Some applications of polarization holographic recording.
TL;DR: Possible applications of polarization holography are demonstrated, including recording of pairs of superimposed holograms with one spatial frequency and logical operations on two data arrays recorded simultaneously in the material.
140
Optical wavelet matched filters for shift-invariant pattern recognition.
TL;DR: These new bandpass matched filters show improved discrimination capability with respect to the conventional matched spatial filter and improved signal-to-noise ratio withrespect to the phase-only matched filter.
83
Holographic recording and retrieval of polarized light by use of polyester containing cyanoazobenzene units in the side chain
TL;DR: It was revealed that, when a linearly polarized object beam with an arbitrary polarization direction was recorded, the retrieved beam had the same polarization state as that of the object beam, with a constant diffraction efficiency of 0.1.
59
Optical realization of the wavelet transform for two-dimensional objects
David Mendlovic,Naim Konforti +1 more
TL;DR: Two experiments are described, one of them with a spatial light modulator at the input plane in order to enable the real-time property of wavelet transformations of two-dimensional objects.
55