100-MHz optical counter that uses directional coupler switches

Feuerstein, R.J.; Soukup, T. J.; Heuring, Vincent P.

doi:10.1364/ol.16.001599

Cited by 23 publications

(11 citation statements)

References 3 publications

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“…The SPOC clock rate of 50 MHz is within a factor of four of this. The 100 MHz clock rate of the time-multiplexed machine will be within a factor of two of the bandwidth, as was the clock rate of the successfully demonstrated 100 MHz counter [19].…”

Section: The Stored Program Optical Computermentioning

confidence: 94%

“…The result is two time multiplexed state machines running simultaneously at the original clock rate. We have demonstrated this time-multiplexed operation in a bit serial, digital optical circuit [19].…”

Section: Basis For the Design Paradigmmentioning

confidence: 98%

“…The pulse stretching done electronically in the prototype can be done by merging two time shifted optical signals, but electronic stretching was more cost effective. More details are given in [19].…”

Section: Implementation Domainmentioning

confidence: 99%

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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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Section: The Stored Program Optical Computermentioning

confidence: 94%

Section: Basis For the Design Paradigmmentioning

confidence: 98%

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

1994

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“…As a key component in both areas of optical computing and communication, alloptical binary counter can be used as a finite-state machine in optical computing and can also be used for header recognizing and payload processing in optical packet switching networks. Nevertheless, there are few papers related to all-optical counter (Poustie et al, 2000;Benner et al, 1990;Feuerstein et al, 1991). In (Poustie et al, 2000) an all-optical binary counter based on terahertz optical asymmetric demultiplexer (TOAD) switching gate was demonstrated, which is however not integrable due to the nonlinear fiber loop mirrors in the TOADs.…”

Section: Latch-based All-optical Countermentioning

confidence: 99%

All-Optical Flip-Flops Based on Semiconductor Technologies

Bogoni¹,

Berrettini²,

Ghelfi³

et al. 2010

Semiconductor Technologies

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Optical technologies represent the main bet for future communication systems. Among the others, digital subsystems for optical processing are of great interest thanks to their intrinsic properties in terms of bandwidth, transparency, immunity to the electromagnetic interference, cost, power consumption, as well as robustness in hostile environment. Key basic functions are represented by logic gate, logic function, flip-flop memories, optical random access memories, etc.. Research in this field is in its very early stages even if some interesting techniques have been already theoretically addressed and experimentally demonstrated. Here we review the state of the art for all-optical flip-flop based on semiconductor technologies: best result will be highlighted in terms of transition speed, switching energy, complexity and power consumption; we will then discuss some new achievement we have recently reached. All-optical packet switching seems to be the most promising way to take advantage of fiber bandwidth to increase routers forwarding capacity, being able to achieve very high data rate operations. All-optical flip-flops have been widely investigated mainly because they can be exploited in all-optical packet switches, where switching, routing and forwarding are directly carried out in the optical domain. Some examples concerning optical packet switches are shown in (Dorren et al., 2003;Liu et al., 2005;Bogoni et al., 2007;Herrera et al., 2007), where an optical flip-flop stores the switch control information and drives the switching operation. Former solutions for all-optical flip-flops have been demonstrated exploiting discrete devices (Dorren et al., 2003) or Erbium-doped fiber properties (Malacarne et al., 2007) which suffer from slow switching times and high set/reset input powers. Several integrated or integrable solutions (Hill et al., 2004;Liu et al., 2006) present a switching energy in the fJ range and switching times of tens of ps at the expenses of poor contrast ratios. On the other hand in (Hill et al., 2005) an integrated scheme exhibiting a very high contrast ratio value but with transition times in the ns range is reported. In any case a 15 www.intechopen.com

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“…In this regard, many researchers have shown their keen interest in implementing an optical binary counter. First of all, a 100 MHz optical counter was constructed (Feuerstein et al 1991) that used directional coupler switches and operated with both 4-bit and 6-bit counts by using two different counter designs. Optical binary counters using SOA-MZIs in different configurations have been demonstrated (Wang et al 2009;Kaur and Kaler 2014;Poustie et al 2000).…”

Section: Introductionmentioning

confidence: 99%

An optical synchronous up counter based on electro-optic effect of lithium niobate based Mach–Zehnder interferometers

et al. 2015

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Sequential circuits have the ability to store, retain and then retrieve information when needed at a later time. They act as storage elements and have memory. However, due to ever increasing demand of data rate, already existing electronic signal processing devices have become obsolete due to their large latency. To overcome the existing bottleneck, a 4-bit synchronous up counter using electro-optic effect of Mach-Zehnder interferometer has been proposed. The study is carried out by simulating the proposed device with beam propagation method.

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100-MHz optical counter that uses directional coupler switches

Cited by 23 publications

References 3 publications

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

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

All-Optical Flip-Flops Based on Semiconductor Technologies

An optical synchronous up counter based on electro-optic effect of lithium niobate based Mach–Zehnder interferometers

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