An optical conversion system: From binary to decimal and decimal to binary

Mukhopadhyay, Sourangshu

doi:10.1016/0030-4018(90)90257-t

Cited by 47 publications

(19 citation statements)

References 8 publications

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“…Tree architecture is a multiplying system of single straight path into several distributed branches and subbranch paths [26]. This structure is explained in Fig.…”

Section: Optical Tree Architecturementioning

confidence: 99%

“…Optical tree architecture (OTA) also takes an important role in this regard [26][27][28]. In this communication we propose a new and alternative scheme, which exploits the advantages of both SOA-MZI and OTA, for implementation of all-optical parallel logic and arithmetic operations (half adder, full-adder and full-subtractor) of binary data.…”

Section: Introductionmentioning

confidence: 99%

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Mach–Zehnder interferometer-based tree architecture for all-optical logic and arithmetic operations

Roy¹

2009

Optik

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“…Tree architecture is a multiplying system of single straight path into several distributed branches and subbranch paths [26]. This structure is explained in Fig.…”

Section: Optical Tree Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mach–Zehnder interferometer-based tree architecture for all-optical logic and arithmetic operations

Roy¹

2009

Optik

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“…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.)…”

mentioning

confidence: 99%

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

Mitra

Mukhopadhyay

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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“…A photon is a suitable information carrier in many ways and a variety of information processors have been proposed in the last few decades using photon as carrier. [1][2][3][4] All optical parallel computation is the key technology for all optical networks and all optical logic gates are the essential parts of the optical computer. Recently, quantum information and computation has emerged as a growing field of research, but has many difficulties to overcome, among them decoherence is an important one, 5,6 so research on high speed classical optical computation is still an active area using non-linear effects.…”

Section: Introductionmentioning

confidence: 99%

On the Method of Implementation of Frequency Encoded All Optical Reconfigurable Logic Gates Based on Total Reflectional Optical Switch at the Interface

Mukherjee¹

2011

Opt. Photonic Lett.

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A novel method of implementation of frequency encoded reconfigurable logic gates NOT, OR, AND, NOR, NAND, X-OR, X-NOR is discussed. The frequency sources and physical requirements for the implementation are also discussed. The non-linear material (liquid) suitable for these operations to be performed should be of large non-linear coefficient, high reverse saturation absorption, large thermo optic coefficient and low viscosity to get transformed into gas quickly when illuminated with a controlling beam of suitable intensity. The input controlling beams used to induce non-linearity in the switch are either of frequency υ 1 or υ 2 and the probe beam is a mixed signal of frequencies υ 1 and υ 2 . The controlling inputs decide the output conditions of the probe to get different logic gates. The gates are reconfigurable in the sense that we can get one gate from another gate by just changing the filters used in the output ports or tuning the filters.

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An optical conversion system: From binary to decimal and decimal to binary

Cited by 47 publications

References 8 publications

Mach–Zehnder interferometer-based tree architecture for all-optical logic and arithmetic operations

Mach–Zehnder interferometer-based tree architecture for all-optical logic and arithmetic operations

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

On the Method of Implementation of Frequency Encoded All Optical Reconfigurable Logic Gates Based on Total Reflectional Optical Switch at the Interface

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