Design of a minimized LED array for maximum parallel logic operations in optical shadow casting technique

Mukhopadhyay, Sourangshu; Roy, Jitendra Nath; Bera, Sanchari

doi:10.1016/0030-4018(93)90700-f

Cited by 24 publications

(5 citation statements)

References 7 publications

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“…13,14 The basic advantages of optics over electronics are parallel, high-speed, high-bandwidth noninterfering communications. [15][16][17] Nonlinear optical materials are used as all-optical switches by many scientists and technologists to implement various digital computational circuits. 4,8,9,[18][19][20] In connection with optical computation, designing optical memory switches 21 is of great interest to the photonics community.…”

Section: Introductionmentioning

confidence: 99%

All-optical implementation of <inline-formula><math display="inline" overflow="scroll"><mrow><mi>S</mi><mtext>-</mtext><mi>R</mi></mrow></math></inline-formula>, clocked <inline-formula><math display="inline" overflow="scroll"><mrow><mi>S</mi><mtext>-</mtext><mi>R</mi></mrow></math></inline-formula>, and <inline-formula><math display="inline" overflow="scr

Dhar¹,

Sahu²

2008

Opt. Eng

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A nonlinear-material-based all-optical switching mechanism is utilized to develop the optical flip-flop. As flip-flops are sequential logic circuits, the present state of outputs is dependent on both the present inputs as well as the past outputs. In our present scheme, the outputs are fed back to the former stages instead of the input stages. The output Q and its complemented Q are obtained simultaneously in our scheme.

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Section: Introductionmentioning

confidence: 99%

All-optical implementation of <inline-formula><math display="inline" overflow="scroll"><mrow><mi>S</mi><mtext>-</mtext><mi>R</mi></mrow></math></inline-formula>, clocked <inline-formula><math display="inline" overflow="scroll"><mrow><mi>S</mi><mtext>-</mtext><mi>R</mi></mrow></math></inline-formula>, and <inline-formula><math display="inline" overflow="scr

Dhar¹,

Sahu²

2008

Opt. Eng

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“…Owing to this replacement, high speed communication will be achieved as well as many other operational activities, including three dimensional image and data processing, neural networking, real time operations, memory storage capacity of the computer, data carrying capacity, computer computer interaction and interfacing, channel base and channel free operation, local to wide area networking etc. will be implemented very successfully [1,2,6,7,9,[10][11][12][13][14] . In information communication systems, the optical soliton pulses is are better accepted than ordinary optical pulses as the optical soliton pulses offers some special and very crucial advantages over ordinary optical pulses.…”

mentioning

confidence: 99%

An all-optical remote controlled X-Nor logic using soliton pulse

Kuila¹,

Sinha²,

Mukhopadhyay

2008

Optoelectron. Lett.

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We propose a new method to perform an ultra high speed all optical remote controlled X-NOR logic operation at a very long distance by exploiting the interaction of hypersecant optical soliton pulses (HOSP). To implement such logic operation, three HOSPs maintaining a particular condition are introduced into an optical fiber where they interact with each other.Two of them carry the input of the logic operation with the constant triggering of other HOSP.Many scientists around the world are very much actively involved in the research of photonic communication. They believe that if the electronic signal can be replaced successfully in communication systems by photons, the horizon of the world of communication will be greatly extended. Owing to this replacement, high speed communication will be achieved as well as many other operational activities, including three dimensional image and data processing, neural networking, real time operations, memory storage capacity of the computer, data carrying capacity, computer computer interaction and interfacing, channel base and channel free operation, local to wide area networking etc. will be implemented very successfully [1,2,6,7,9,[10][11][12][13][14] . In information communication systems, the optical soliton pulses is are better accepted than ordinary optical pulses as the optical soliton pulses offers some special and very crucial advantages over ordinary optical pulses. Due to high potentiality of optical solitons, they can be used for very long distance communication systems without using any repeaters as general optical pulses are attenuated for long distance without any repeaters [3][4][5]8,15] . Nowadays optical solitons find extensive versatile applications in many fields such as the all-optical communication link, optical pulse compression, optical soliton switches, and soliton laser, etc. Therefore, scientists are very much interested in optical soliton pulses and their propagation behaviour inside the optical fiber.In this letter, we propose the implementation of an alloptical two input X-NOR logic operation based on hypersecant optical soliton pulses (HOSPs). Here three HOSPs are used with a special maintaining condition. The interaction behaviors of the soliton pulses inside the fiber material are actively used for this purpose. Two of them carry the inputs of the logic and the other one is used as the constant triggering signal. Other logic operations, e.g. different flip-flops operations, etc, could be implemented by using the interaction technique between the HOSPs. Optical soliton based all optical operations represent such type of all optical devices capable of operating at least thousand times faster than the most advanced electronic devices.An optical pulse propagating through a non-linear attenuation medium can be characterized by the following equation:where f (z,t) represents the pulse envelope, and V g represents the group velocity of the pulse.where n 0 is the refractive index of the medium at weak fields, and n 2 is the non-linear correction term ...

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“…The importance of optics has been recognized in the last three to four decades when high-speed logic operations were found to meet the basic requirements in data processing circuits [1,2] . Optics can be successfully implemented in different applications like arithmetic data processing, holographic memory, optical pattern recognition, and digital memory operations due to its inherent parallelism [3−5] .…”

mentioning

confidence: 99%

“…2 of continuous-wave (CW) exposure by Yb fiber laser at 1085 nm. The values of n 0 and n 2 for PTR glass are measured to be 1.496 and 3.3 × 10 −20 m 2 /W at 800 nm.…”

mentioning

confidence: 99%

An all-optical comparison scheme between two multi-bit data with optical nonlinear material

2008

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Over the last few decades, several all-optical circuits have been proposed to meet the need of high-speed data processing. In some information processing architectures, the role of various analog and digital data comparisons is very important. In this letter, we proposed a multi-bit data comparison scheme. The scheme is based on the switching property of optical nonlinear material. Ultrafast operational speed larger than gigahertz can be expected from this all-optical scheme.

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Design of a minimized LED array for maximum parallel logic operations in optical shadow casting technique

Cited by 24 publications

References 7 publications

An all-optical remote controlled X-Nor logic using soliton pulse

An all-optical comparison scheme between two multi-bit data with optical nonlinear material

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