The Optically Programmable Gate Array (OPGA), an optical version of a conventional FPGA, benefits from a direct parallel interface between an optical memory and a logic circuit. The OPGA utilizes a holographic memory accessed by an array of VCSELs to program its logic. An active pixel sensor array incorporated into the OPGA chip makes it possible to optically address the logic in a very short time allowing for rapid dynamic reconfiguration. Combining spatial and shift multiplexing to store the configuration pages in the memory, the OPGA module can be made compact. The reconfiguration capability of the OPGA can be applied to solve more efficiently problems in pattern recognition and database search.

/pdf/optically-programmable-gate-array-mqrzei4wg5.pdf

Optically programmable gate array

Methods and systems for creating a numerical pseudocore model, comprising: a) obtaining logging data from a reservoir having depth-defined intervals of the reservoir, and processing the logging data into interpretable borehole image data having unidentified borehole image data; b) examining one of the interpretable borehole image data, other processed logging data or both to generate the unidentified borehole image data, processing the generated unidentified borehole image data into the interpretable borehole image data to generate warped fullbore image data; c) collecting one of a core from the reservoir, the logging data or both and generating a digital core data from one of the collected core, the logging data or both such that generated digital core data represents features of one or more depth-defined interval of the reservoir; and d) processing generated digital core data, interpretable borehole image data or the logging data to generate realizations of the numerical pseudocore model.

Method to generate numerical pseudocores using borehole images, digital rock samples, and multi-point statistics

Based on the present invention, superior compact spectrometers may be constructed and integrated into a cellular phone, or attached to a cellular phone. Such a cellular phone may be a PDA phone, which supplies electrical power to the said spectrometer, provided with data storage, signal processing capability, and real-time display. As a combined standalone system, it allows spectroscopic measurements to be fulfilled in real-time applications in field, and results can be sent out in wireless communication to a remote station or to another cellular phone user in order to share the measurement results right away. When the system is used with a laser to function as a Raman spectrometer system, it can fulfill many daily routine tasks encountered by ordinary civilians, for example, the blood glucose monitoring for diabetes patients at home in a non-invasive manner.

Spectrometers miniaturized for working with cellular phones and other portable electronic devices

We present an experimental study on the photopolymer poly- (methyl methacrylate) doped with phenathrenequinone molecules. Mate- rial characteristics for holographic data storage, including optical charac- teristics, scattering effect, relation between diffraction efficiency and number of holograms, and exposure schedule for multiple storage, are investigated. An experimental demonstration of multiple storage of digital data pages in a polymer cube is presented. © 2003 Society of Photo-Optical

https://ir.nctu.edu.tw:443/bitstream/11536/27895/1/000182985900031.pdf

Experimental characterization of phenanthrenequinone-doped poly(methyl methacrylate) photopolymer for volume holographic storage

Data storage is the conversion of abstract information, representing the data, into physical changes in an appropriate medium. Data retrieval is the inference of the stored information from the storage-induced changes. The physical processes applied to different storage technologies differ widely, and, to a large extent, define their performance limits and applications. In this chapter we focus on the construction of holographic memories utilizing the effect of volume diffraction. Material physics related to holographic storage is the topic of later chapters.

Volume Holographic Multiplexing Methods

The high data transfer rate achievable in page-oriented optical memories demands for parallel interfaces to logic circuits able to process efficiently the data. The Optically Programmable Gate Array, an enhanced version of a conventional FPGA, utilizes a holographic memory accessed by an array of VCSELs to program its logic. Combining spatial and shift multiplexing to store the configuration pages in the memory, the OPGA module is very compact and has extremely short configuration time allowing for dynamic reconfiguration. The reconfiguration capability of the OPGA can be applied to solve more efficiently problems in pattern recognition and digit classification.

/pdf/optical-memory-for-computing-and-information-processing-2tl6lz0zry.pdf

Optical memory for computing and information processing

Reconfigurable processors bring a new computational paradigm where the processor modifies its structure to suit a given application, rather than having to modify the application to fit the device. The Optically Programmable Gate Array, an enhanced version of a conventional FPGA, utilizes a holographic memory accessed by an array of VCSELs to program its logic. Combining spatial and shift multipexing to store the configuration pages in the memory, the OPGA module is very compact and has extremely short configuration time allowing for dynamic reconfiguration. The reconfiguration capability of the OPGA can be applied to solve more efficiently problems in pattern recognition and digit classification.

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10296/102960D/Optically-reconfigurable-processors/10.1117/12.365910.pdf

Optically reconfigurable processors

Reconfigurable processors, like the field programmable gate arrays (FPGAs), open new computational paradigms where the processor is able to tailor its internal structure to better implement a given application A typical FPGA consists of an array of configurable logic blocks and a mesh of interconnections fully programmable by the user to perform a given application By just changing its internal connectivity, the FPGA can implement a totally different new function However in most of the applications, the FPGA is configured only once and used as coprocessor to carry out some highly complex or time-consuming computation The reason for such limitation is the small communication bandwidth between the FPGA chip and the external memory, usually ROM, where the configuration data is stored The Optically Programmable Gate Array (OPGA), an enhanced version of a conventional FPGA, can overcome this problem The OPGA utilizes a holographic memory accessed by an array of VCSELs to program its logic The on-chip logic has been complemented with an array of photodetectors to detect the configuration template recorded in the memory Combining spatial and shift multiplexing to store the configuration pages in the memory, the OPGA module is very compact and has extremely short configuration time allowing for dynamic reconfiguration The reconfiguration capability of the OPGA can be applied to solve more efficiently problems in pattern recognition and digit classification

https://ir.nctu.edu.tw:443/bitstream/11536/29533/1/000169656100011.pdf

Jose Mumbru

Papers

Optically programmable gate array

Optical memory for computing and information processing

Optically reconfigurable processors

Optically reconfigurable processors

Comparison of the recording dynamics of phenanthrenequinone-doped poly(methyl methacrylate) materials