2008

DOI: 10.1007/bf03354842

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A New Scheme of an all-Optical J-K Flipflop using Non-Linear Material

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Sourangshu Mukhopadhyay

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Optical Switches2

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2009

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Cited by 13 publications

(5 citation statements)

References 7 publications

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“…When both J n and K n is 0, Q n+1 and Q nþ1 retain its earlier values. The detailed operation of this type of J-K FF is already explained [11]. When the clock pulse is absent the J-K FF does not work according to its truth table.…”

Section: Optical Switchesmentioning

confidence: 98%

“…With the use of all-optical NAND logic gate one can construct an all-optical J-K FF [11]. Figure 3(b) shows an all-optical J-K Flip-Flop where, J n and K n are the inputs, C K is the clock pulse, CLS is the constant light source used to activate the NAND logic gates N 1 , N 2 , N 3 and N 4 respectively.…”

Section: Optical Switchesmentioning

confidence: 99%

“…Optical R-S FlipFlop, optical J-K Flip-Flop etc. are proposed for implementation, where non-linear properties of some materials are exploited as far as practicable [10,11].…”

Section: Introductionmentioning

confidence: 99%

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An all-optical architecture of serial to parallel converter by using Kerr type of non-linear material

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2010

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Optics is a strong and potential candidate in the field of both communication and data processing because of its several inherent advantages. In digital communication the conversion of serial to parallel and parallel to serial data is very much essential for adopting some special modulation. In this communication the authors propose a new concept of developing an all-optical converter which converts a serial data to parallel one. For this purpose the authors use several optical logic gates specifically AND,

“…When both J n and K n is 0, Q n+1 and Q nþ1 retain its earlier values. The detailed operation of this type of J-K FF is already explained [11]. When the clock pulse is absent the J-K FF does not work according to its truth table.…”

Section: Optical Switchesmentioning

confidence: 98%

“…With the use of all-optical NAND logic gate one can construct an all-optical J-K FF [11]. Figure 3(b) shows an all-optical J-K Flip-Flop where, J n and K n are the inputs, C K is the clock pulse, CLS is the constant light source used to activate the NAND logic gates N 1 , N 2 , N 3 and N 4 respectively.…”

Section: Optical Switchesmentioning

confidence: 99%

“…Optical R-S FlipFlop, optical J-K Flip-Flop etc. are proposed for implementation, where non-linear properties of some materials are exploited as far as practicable [10,11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An all-optical architecture of serial to parallel converter by using Kerr type of non-linear material

¹

,

²

,

³

2010

Self Cite

View full text Add to dashboard Cite

Optics is a strong and potential candidate in the field of both communication and data processing because of its several inherent advantages. In digital communication the conversion of serial to parallel and parallel to serial data is very much essential for adopting some special modulation. In this communication the authors propose a new concept of developing an all-optical converter which converts a serial data to parallel one. For this purpose the authors use several optical logic gates specifically AND,

“…Several concepts of optical digital memory devices such as alloptical clocked R-S flip-flop, astable, bi-stable multivibrator have been proposed using the above switching mechanism (i.e. variation of r.i. with I) of non-linear material [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A method of developing all-optical mono-stable multivibrator system exploiting the Kerr non-linearity of medium

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2011

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“…Several all optical logic and arithmetic devices have been proposed which are based on this type of switching [6,9] . An optical J-K Flip-flop which is nothing but a bi-stable multivibrator has been also proposed on this concept of switching [10] .…”

mentioning

confidence: 99%

Development on astable multivibrators using the combination of linear and non-linear materials as switching elements based on all optial method

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2009

Optoelectron. Lett.

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In this communication we propose a method to implement an all-optical astable multivibrator using the non-linear material based switches and logic gates. The scheme can operate in real time. The delay time can achieve ps(pico-second). The pulse duration can be made very low and may cross the THz easily by selecting proper material and laser source.The roles of switches are essential and obvious in any information processing mechanism. Different all-optical switches are already developed by scientists. Also the all-optical logic gates are developed using the combination of linear and nonlinear optical materials. Several memory devices, such as all optical clocked R-S flipflop, J-K flip flop etc., are developed using this switching mechanism of non-linear material. Here, the authors propose a new proposal to develop an astable multivibrator using NOT (Inversion) logic gate, which are all optical in nature. It is widely established that super fast computation can deal with photon easily [1][2][3] . In this connection different all-optical logic devices are already developed around the world by the last few decades [4][5][6] .Inherent parallelisms of an optical signal over its electronic counterpart can be exploited in several ways. Nonlinear optical devices come in the frontline of such ways of optical information processing. Many high-speed operations have been implemented by the use of optical non-linear material [7][8][9] . We know that many isotropic non-linear materials (such as pure silica glass, CS2 etc.) follow the refractive index relation as where n is the refractive index (r.i) of a non-linear material, n 2 is the non-linear correction term, n 0 is a constant linear r. i term and I is the intensity of light passing through the material. This helps us to understand the basic switching operation using nonlinear material with an optical signal. In Fig.1 we n = n 0 + n 2 I , have shown an optical switch. Here X and Y are the two inputs each with a prefixed intensity I, M is the mirror used to change the path, and B.S is the beam splitter or combiner. When both of the inputs are present, the refracted output will pass through O 1 channel and when any one of them is present, the output will be obtained through O 2 channel. This happens according to the above nonlinear equation and Snells' law. Now we discuss the basic operation of logic NOT gate using the combination of linear and non-linear materials and above switching mechanism.The schematic diagram of NOT logic gate can be understood also by Fig.1. Here X is the input channel and CLS represents the constant light source Y, which both have a specified intensity I 1 . The output channels are O 1 and O 2 . When the input channel X does not have any light signal i.e. at the logic state 0, then light goes through channel O 2 ;and when X is in a logic state 1, i.e. it has light with a specified intensity, then light follows the channel O 1 . To get the output of a NOT logic gate, the observer should be at the position of channel O 2 . Several all optical logic an...

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