研究者詳細 - 渡邊　実

Programmable Optically Reconfigurable Gate Array Architecture and its writer 査読

KUBOTA Shinya, WATANABE Minoru

APPLIED OPTICS 48 ( 2 ) 302 - 308 2009年1月

Programmable optically reconfigurable gate array architecture and its writer 査読

Shinya Kubota, Minoru Watanabe

APPLIED OPTICS 48 ( 2 ) 302 - 308 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：OPTICAL SOC AMER

Recently, optically reconfigurable gate arrays (ORGAs), which consist of a gate array VLSI, a holographic memory, and a laser array, have been developed to achieve huge virtual gate counts that vastly surpass those of currently available VLSIs. By exploiting the large storage capacity of a holographic memory, VLSIs with more than 1 teragate counts will be producible. However, compared with current field programmable gate arrays, conventional ORGAs have one important shortcoming: they cannot be reprogrammed after fabrication. To reprogram ORGAs, a holographic memory must be disassembled from its ORGA package, then reprogrammed outside of the ORGA package using a holographic memory writer. It must then be implemented onto the ORGA package with high precision techniques beyond that which can be provided by manual assembly. Therefore, to improve this shortcoming, this paper proposes what is believed to be the world's first programmable ORGA architecture with no disassembly. Finally, the availability of this architecture is discussed based on the experimental results. (C) 2009 Optical Society of America

DOI： 10.1364/AO.48.000302

An inversion/non-inversion dynamic optically reconfigurable gate array VLSI 査読

M. Watanabe, M. Nakajima, S. Kato

World Scientific and Engineering Academy and Society Transactions on Circuits and Systems 8 ( 1 ) 11 - 20 2009年1月

Fault tolerance analysis of MEMS holographic memory for DORGAs 査読

Daisaku Seto, Minoru Watanabe

20th Anniversary MHS 2009 and Micro-Nano Global COE - 2009 International Symposium on Micro-NanoMechatronics and Human Science 33 - 37 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Demand for fast dynamic reconfiguration has increased since dynamic reconfiguration can accelerate the performance of implementation circuits on its programmable gate array. Such dynamic reconfiguration is dependent upon two important features: fast reconfiguration and numerous contexts. However, fast reconfiguration and numerous contexts share a tradeoff relation on current VLSIs. Therefore, optically recon-figurable gate arrays (ORGAs) have been developed to resolve this dilemma. Among studies of such devices, this paper presents a demonstration of a dynamic ORGA (DORGA) with a MEMS holographic memory and its fault tolerance analysis results. ©2009 IEEE.

DOI： 10.1109/MHS.2009.5352102

A lens-less imaging holographic memory writer system for a programmable optically reconfigurable gate array 査読

Shinya Kubota, Minoru Watanabe

2009 INTERNATIONAL CONFERENCE ON EMERGING TRENDS IN ELECTRONIC AND PHOTONIC DEVICES AND SYSTEMS (ELECTRO-2009) 112 - 115 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Recently, optically reconfigurable gate arrays (OR-GAs) consisting of a gate array VLSI, a holographic memory, and a laser array have been developed to achieve a huge virtual gate count that is much larger than those of currently available VLSIs. Consequently, ORGAs with more than tera-gate capacity will be realized by exploiting the storage capacity of a holographic memory. However, in contrast to current field-programmable gate arrays (FPGAs), conventional ORGAs have an important shortcoming: they are not reprogrammable after fabrication because, to reprogram ORGAs, a holographic memory must be disassembled from its ORGA package and reprogrammed outside of the ORGA package using a holographic memory writer. Then it must be implemented onto the ORGA package with high precision beyond the capability of manual assembly. To remove that problem, this paper presents a new programmable optically reconfigurable gate array and its lens-less imaging holographic memory writer system. Furthermore, this paper presents discussion of the availability of this architecture and future plans based on experimental results.

DOI： 10.1109/ELECTRO.2009.5441161

Fault tolerance of a dynamic optically reconfigurable gate array with a one-time writable volume holographic memory 査読

Takayuk Mabuchi, Kenji Miyashiro, Minoru Watanabe, Akifumi Ogiwara

2009 52ND IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1 AND 2 917 - + 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Optically reconfigurable gate arrays (ORGAs) have been developed as a type of multi-context field programmable gate array to realize fast reconfiguration and numerous reconfiguration contexts. Along with such advantages, ORGAs have particularly high defect tolerance. They consist simply of a holographic memory, a laser diode array, and a gate array VLSI. Even if a gate array VLSI includes defective areas, the perfectly parallel programmable capability of ORGAs enables perfect avoidance of those defective areas through alternative use of other non-defective areas. Moreover, holographic memories to store contexts are known to have high defect tolerance because each bit of a reconfiguration context can be generated from the entire holographic memory. For those reasons, the damage of some part of the device rarely affects its diffraction pattern or a reconfiguration context. Consequently, ORGAs are very robust against component defects in devices such as a laser array, a gate array, and a holographic memory, and are particularly useful for space applications, which require high reliability. This paper presents experimental results of defect tolerance of a new dynamic optically reconfigurable gate array with a one-time easily writable holographic memory.

DOI： 10.1109/MWSCAS.2009.5235916

A multi-context programmable optically reconfigurable gate array without a beam splitter 査読

Shinya Kubota, Minoru Watanabe

2009 52ND IEEE INTERNATIONAL MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOLS 1 AND 2 971 - 974 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Recently, optically reconfigurable gate arrays (ORGAs), which consist of a gate array VLSI, a holographic memory, and a laser array, have been developed to achieve a huge virtual gate count that is much larger than those of currently available VLSIs. Consequently, exploitation of the storage capacity of a holographic memory produces ORGAs with more than tera-gate capacity. However, comparison of conventional ORGAs with current field programmable gate arrays (FPGAs) reveals one important shortcoming: they are not reprogrammable after fabrication: to reprogram an ORGA, a holographic memory must be disassembled from its ORGA package, reprogrammed outside of the ORGA package using a holographic memory writer, and again implemented onto the ORGA package with high precision beyond the capability of manual assembly. Therefore, to remove that shortcoming, a programmable ORGA has been proposed. However, since previously proposed programmable ORGA configurations used a beam splitter, its alignment was complicated. Furthermore, the alignments of lasers were also limited. This paper presents a multi-context programmable optically reconfigurable gate array that uses no beam splitter. Furthermore, this paper presents discussions of the availability of this architecture and future plans based on experimental results.

DOI： 10.1109/MWSCAS.2009.5235928

MEMS OPTICALLY RECONFIGURABLE GATE ARRAY 査読

Hironobu Morita, Minoru Watanabe

FPL: 2009 INTERNATIONAL CONFERENCE ON FIELD PROGRAMMABLE LOGIC AND APPLICATIONS 511 - 515 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Demand for fast dynamic reconfiguration has increased since dynamic reconfiguration can accelerate the performance of implementation circuits on its programmable gate array. Such dynamic reconfiguration requires two important features: fast reconfiguration and numerous contexts. However, fast reconfigurations and numerous contexts share a trade-off relation on current VLSIs. Therefore, optically reconfigurable gate arrays (ORGAs) have been developed to resolve this dilemma. ORGAs can realize a large virtual gate count that is much larger than those of current VLSI chips by exploiting the large storage capacity of a holographic memory. Also, ORGAs can realize fast reconfiguration through use of large bandwidth optical connections between a holographic memory and a programmable gate array VLSI. This paper presents the world's first demonstration of an ORGA with micro electro mechanical system's (MEMS) holographic memory.

DOI： 10.1109/FPL.2009.5272445

36-Context dynamic optically reconfigurable gate array 査読

Mao Nakajima, Minoru Watanabe

2009 IEEE/SICE International Symposium on System Integration: SI International 2008 - The 2nd Symposium on System Integration 19 - 23 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Optically reconfigurable gate arrays (ORGAs) have been developed for the purposes of realizing large virtual gates and increasing a gate array's performance by combining a holographic memory with a programmable gate array. In addition, dynamic optically reconfigurable gate arrays (DORGAs) using a photodiode memory architecture have been developed to realize a high-density VLSI. We have already demonstrated a 16-context DORGA architecture with a nanosecond-order reconfiguration capability. This paper presents a more advanced 36-context DORGA with performance that exceeds that of current dynamic reconfigurable devices. ©2009 IEEE.

DOI： 10.1109/SI.2009.5384563

An optical configuration acceleration method using negative logic implementation 査読

Retsu Moriwaki, Minoru Watanabe

2009 INTERNATIONAL CONFERENCE ON EMERGING TRENDS IN ELECTRONIC AND PHOTONIC DEVICES AND SYSTEMS (ELECTRO-2009) 552 - 555 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Up to now, as one of multi-context devices, an optically reconfigurable gate array (ORGA) has been developed to achieve high-speed reconfiguration. Since quick context switching allows implementation of many functions onto a gate array without idle time, fast reconfiguration is extremely important for multi-context devices. In ORGAs, the easiest way to increase the reconfiguration frequency is to use high-power lasers. However, such high-power lasers increase power consumption and package size. In the worst case, they might require a cooling system. For that reason, this paper proposes a negative logic implementation method by which optical configurations can be accelerated without ORGA architecture modification and any increase of laser power. This time, the method was demonstrated on a dynamic optically reconfigurable gate array architecture. Based on the experimental results, this paper clarifies the acceleration method's effectiveness.

DOI： 10.1109/ELECTRO.2009.5441043

Fiber remote configuration for an optically reconfigurable gate array 査読

Yumiko Ueno, Minoru Watanabe

2009 INTERNATIONAL SOC DESIGN CONFERENCE (ISOCC 2009) 460 - 463 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

A function enabling remote programming is necessary for systems at nuclear power plants, plants with no personnel, and other systems. Recently, an optically reconfigurable gate array (ORGA) architecture has been developed to achieve a huge virtual gate count that is much larger than those of currently available VLSIs. However, ORGA architectures have never realized a remote programming capability. Therefore, this paper proposes a new remotely reconfigurable gate array architecture that enables remote reconfiguration using optical fiber networks. Furthermore, this paper presents discussion of the availability of this architecture and future plans based on experimental results.

DOI： 10.1109/SOCDC.2009.5423925

MEMS inversion/non-inversion dynamic optically reconfigurable gate array 査読

Daisaku Seto, Minoru Watanabe

2009 IEEE/SICE International Symposium on System Integration: SI International 2008 - The 2nd Symposium on System Integration 24 - 29 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

To date, for large system integrations, various optically reconfigurable gate arrays (ORGAs) have been developed to realize both fast reconfiguration and numerous reconfiguration contexts. Optically differential reconfigurable gate arrays (ODRGAs) present advantageous capabilities compared with ORGAs: they have increased reconfiguration frequency per unit of laser power and reduced optical power consumption. Dynamic optically reconfigurable gate arrays (DORGA) can realize the highest gate density. Nevertheless, an important disadvantage of DORGAs is that their reconfiguration frequency is lower than that of ODRGAs and their optical power consumption is greater than that of ODRGAs. Therefore, a novel inversion/non-inversion dynamic optically reconfigurable gate array incorporating only the good attributes from both architectures has been developed. This paper presents a novel inversion/non-inversion ORGA using a rewritable MEMS holographic memory. ©2009 IEEE.

DOI： 10.1109/SI.2009.5384560

MEMS Optically Differential Reconfigurable Gate Array 査読

Hironobu Morita, Minoru Watanabe

2009 IEEE INTERNATIONAL CONFERENCE OF ELECTRON DEVICES AND SOLID-STATE CIRCUITS (EDSSC 2009) 119 - 122 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Demands for fast dynamic reconfiguration for programmable devices have increased because the fast dynamic reconfiguration can increase the number of functions on a gate array. This paper presents a proposal of a novel optically differential reconfigurable gate array architecture with a microelectromechanical system (MEMS) mirror array that enables high-speed reconfiguration by exploiting large-bandwidth optical connections between the MEMS mirror array and a programmable gate array. The MEMS mirror array is used as a holographic memory. Four configuration contexts can be programmed electrically and dynamically onto the MEMS mirror array as holographic memory information. A configuration procedure is executed by switching of both a laser array and a MEMS mirror array. This experiment has demonstrated a four-context 9 ns microelectromechanical reconfiguration for a programmable gate array.

DOI： 10.1109/EDSSC.2009.5394174

A 36-context optically reconfigurable gate array 査読

Mao Nakajima, Minoru Watanabe

2009 INTERNATIONAL SOC DESIGN CONFERENCE (ISOCC 2009) 412 - 415 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Fast reconfiguration and numerous reconfiguration contexts are two important features of dynamically reconfigurable devices. However, realizing both is difficult in current dynamically reconfigurable devices. Therefore, optically reconfigurable gate arrays (ORGAs) have been under development to solve this problem. Actually, ORGAs can realize a large virtual gate count over current VLSIs by combining a holographic memory storing numerous reconfiguration contexts with an optically reconfigurable gate array VLSI. To date, a 16-configuration-context ORGA has been developed. This paper presents a more advanced demonstration of a 36-configuration-context ORGA architecture, which is larger than the number of reconfiguration contexts of current dynamically reconfigurable devices. The 36-configuration-context ORGA architecture achieved 52 ns - 1.65 mu s fast reconfiguration. In addition, this paper presents a discussion of some technical issues for increasing the number of configuration contexts of a multi-context ORGA and future vision, based on results of several experiments.

DOI： 10.1109/SOCDC.2009.5423866

A 13.75 ns holographic reconfiguration of an optically differential reconfigurable gate array 査読

Mao Nakajima, Minoru Watanabe

IIH-MSP 2009 - 2009 5th International Conference on Intelligent Information Hiding and Multimedia Signal Processing 852 - 855 2009年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Reconfiguration applications based on reconfigurable devices present new computational paradigms because increasing the reconfiguration frequency of such devices can enhance their activity and performance dramatically. Recently, optically reconfigurable gate arrays (ORGAs) with a holographic memory were developed, achieving important new advances in the areas of rapid reconfiguration and numerous reconfiguration contexts. Furthermore, optically differential reconfigurable gate arrays have been developed to accelerate optical reconfigurations of conventional ORGAs. This paper presents experimental results of the fastest 13.75 ns holographic reconfiguration of an optically differential reconfigurable gate array, along with discussion of the advantages of optically differential reconfigurable gate array architecture. © 2009 IEEE.

DOI： 10.1109/IIH-MSP.2009.250