Digital optical counter using directional coupler switches

Benner, Alan F.; Bowman, John J.; Erkkila, Tracy; Feuerstein, R.J.; Heuring, Vincent P.; Jordan, Harry F.; Sauer, J.R.; Soukup, T. J.

doi:10.1364/ao.30.004179

Cited by 26 publications

(16 citation statements)

References 7 publications

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“…If the latency can be sufficiently reduced then it may be possible to create truly bit-serial optical delays so that the bitdifferential technique described here would not be required. Optoelectronic counters based on true bit-serial design have been demonstrated previously [19].…”

Section: Discussionmentioning

confidence: 99%

All-optical binary counter

Poustie¹,

Manning²,

Kelly³

et al. 2000

Opt. Express

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Abstract:We experimentally demonstrate an all-optical binary counter composed of four semiconductor optical amplifier based all-optical switching gates. The time-of-flight optical circuit operates with bitdifferential delays between the exclusive-OR gate used for modulo-2 binary addition and the AND gate used for binary carry detection. A movie of the counter operating in real time is presented. Weinert, "40 Gbit/s all-optical demultiplexing using a monolithically integrated Mach-Zehnder interferometer with semiconductor laser amplifiers," Electron. Lett. 31, 1857Lett. 31, -1858Lett. 31, (1995 2000 Optical Society of America

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Section: Discussionmentioning

confidence: 99%

All-optical binary counter

Poustie¹,

Manning²,

Kelly³

et al. 2000

Opt. Express

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“…We would argue that this use of optics for communication and electronics for computation employs optics and electronics each in their most appropriate realms. The feasibility of the design method has been demonstrated by the successful operation of digital optical circuits ranging from a serial counter [17] to a complete serial stored program computer [18].…”

Section: Time-of-flight Latchless Architecturesmentioning

confidence: 99%

“…This limited the clock speed of this first counter to 50 MHz. Details of the 50 MHz counter design and construction are discussed in [17].…”

Section: Binary Countersmentioning

confidence: 99%

Optoelectronic time-of-flight design and the demonstration of an all-optical, stored program, digital computer

1994

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The recent demonstration of an all-optical, stored program, digital computer by our group focused on high speed optoelectronic design. It was made possible by a new digital design method known as time-of-flight design. A rudimentary, but general purpose, proof of principle computer was built, which is all-optical in the sense that all signals connecting logic gates and all memory are optical in nature. LiNbO 3 directional couplers, electro-optic switches, are used to perform logic operations In addition to demonstrating stored program operation in an optoelectronic digital computer, the system demonstrated the feasibility of the new design method, which does not use any flip flops or other bistable devices for synchronization or memory. This potentially allows system clock rates of the same order as device bandwidth. This paper describes how the time-of-flight design method was motivated by the special properties of optoelectronic digital design. The basic principles of the method we employed will be discussed along with some of its potential advantages. The experimental work with digital optical circuits leading up to and including the stored program computer experiment will then be discussed. Finally, the future potential of time-of-flight design in high bandwidth optoelectronic systems will be discussed. † The Center for Optoelectronic Computing Systems is sponsored in part by NSF grant number ECD 9015128 as part of the Engineering Research Centers Program, and the Colorado Advanced Technology Institute (CATI), an agency of the State of Colorado.

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“…Details of the electronic design are given in Ref. 12. Propagation time through the drive electronics is measured and compensated for during system design.…”

Section: B--a+bmentioning

confidence: 99%

Implementation of a general-purpose stored-program digital optical computer

Main¹,

Feuerstein²,

Jordan³

et al. 1994

Appl. Opt.

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The implementation of what we believe to be the first stored-program digital optical computer is described. The implementation domain consists of lithium niobate directional couplers that are modified to provide optical control and are interconnected with single-mode fiber. The architecture is also the first to employ time-of-flight synchronization. That is, there are no flip-flops used as synchronizing memory elements. Synchronization is achieved by the precise timing of the arrival of information at all points of interaction. The design is a minimal one, employing only 62 directional couplers. Previous papers have discussed the primary architecture and synchronization conditions for the machine. Here we focus on the secondary architecture, construction, debugging, and performance of the machine.

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Digital optical counter using directional coupler switches

Cited by 26 publications

References 7 publications

All-optical binary counter

All-optical binary counter

Optoelectronic time-of-flight design and the demonstration of an all-optical, stored program, digital computer

Implementation of a general-purpose stored-program digital optical computer

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