One-Level Simplification Method for All-Optical Combinational Logic Circuits

Jung, Young Jin; Son, Cheol; Jhon, Young Min; Lee, Seok; Park, Namkyoo

doi:10.1109/lpt.2008.921125

Cited by 26 publications

(12 citation statements)

References 11 publications

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“…According to the above-mentioned explanations and using the combination of input parameters P max = 10.5 dBm, J = 2.5 kA/cm 2 , G ss = 20.5 dB, L = 4 mm, τ 21 = 0.16 ps, g max = 12.7 cm −1 and τ 12 = 1.2 ps, respectively, which obviously is not unique, which falls within the specified boundaries, a more than adequate ER of about 7.45 dB and Q factor of about 7.30 at the output can be obtained, which are reflected in the high quality of pulse stream obtained at the output. This value of Q factor is comparable to the other results obtained by several groups of researchers [57][58][59][60][61]. Rostami et al [31] found Q factors of 8.8 and 4.9 at bit rates of 2 and 2.5 Tb/s, respectively, in their 'XOR' gate design.…”

Section: Simulation Results and Discussionsupporting

confidence: 87%

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

Gayen¹,

Chattopadhyay²

2016

J Comput Electron

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All-optical logic and arithmetic operations are expected to play an important role in high-speed communication systems. In this paper, we have presented a model to perform two basic arithmetic operations (addition/subtraction) on two binary digits based on a quantum dot semiconductor optical amplifier (QD-SOA)-assisted MachZehnder interferometer. Using two QD-SOA-based switches, we have designed a half adder/subtractor circuit. The main advantage of this circuit is that simultaneous addition and subtraction operations are realized at the outputs. This circuit is designed theoretically and verified through numerical simulations. The theoretical study is carried out by taking into account the effect of amplified spontaneous emission. The dependence of the peak data power and that of the QD-SOA current density and length on the ER and Q factor of the switching outcome are explored and assessed by means of numerical simulations. The desirable device parameters has been examined in order to obtain the optimum best performance.Keywords Quantum dot semiconductor optical amplifier · Mach-Zehnder interferometer · All-optical signal processing · All-optical arithmetic operation B Tanay Chattopadhyay

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Section: Simulation Results and Discussionsupporting

confidence: 87%

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

Gayen¹,

Chattopadhyay²

2016

J Comput Electron

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“…In particular the AND gate is indispensable for achieving this goal as it is involved in the accomplishment of numerous tasks in the optical domain both in fundamental and system-oriented level, such as buffering [2], address comparison [3], add-drop multiplexing [4], packet clock and data recovery [5], packet header and payload separation [6], binary pattern recognition [7], binary counting [8], analog-to-digital conversion [9], digital encoding and comparison [10], data regeneration [11], waveform sampling [12], half addition [13], multiplication [14], construction of other logic gates [15] and of combinational logic circuits [16]. Given its important, multi-lateral role the AND gate has attracted intense research interest and among the technological options that exist for its implementation those that exploit a semiconductor optical amplifier (SOA) are well established [17].…”

Section: Introductionmentioning

confidence: 99%

On the Feasibility of 320 Gb/S All-Optical and Gate Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Dimitriadou¹,

Zoiros²

2013

PIER B

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Abstract-The feasibility of realizing an all-optical AND gate for 320 Gb/s return-to-zero data by incorporating quantum-dot semiconductor optical amplifiers (QD-SOAs) in a Mach-Zehnder interferometer (MZI) is theoretically investigated and demonstrated. The proposed scheme employs the QD-SOA-based MZI in a configuration where the QD-SOA in one MZI arm is subject to the first data sequence, the QD-SOA in the other MZI arm receives no such input but is constantly held in the small signal gain regime, and the second data stream is inserted from the common MZI port acting as enabling or disabling signal. Compared to other approaches adopted for the same purpose this implementation is more general, direct, flexible and affordable as only one strong data signal is required to control switching. By conducting numerical simulation the impact of the critical parameters on the Q-factor is thoroughly assessed. The obtained results are interpreted with the help of a complete characterization of the QD-SOA response to an ultrafast data pulse stream. This allows to specify the requirements that the critical parameters must satisfy to achieve acceptable performance. The extracted design rules are technologically realistic and ensure AND operation both with logical correctness and high quality. The outcome of the numerical treatment extends the range of Boolean functions executed with the QD-SOA-MZI module at sub-Tb/s data rates.

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“…As an example, for an all-optical, high-speed logic device based on cross-phase modulation (XPM) [17,18], a multiband slow-light coupled-resonator optical waveguide (CROW) with perfect intensity overlap and matched group velocities of its bands would be ideal.…”

Section: Introductionmentioning

confidence: 99%

Slow-light dispersion properties of multiatomic multiband coupled-resonator optical waveguides

Piao

Park

2012

Phys. Rev. A

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In this paper, we investigate the dispersion properties of a multiatomic coupled-resonator optical waveguide (CROW), and show the existence of band-dependent group velocities in its slow-light bands. By including the next-nearest-neighbor coupling terms in a coupled-mode theory (CMT) analysis for the structure, we explain the physical origin of the band-dependent group velocities in terms of the modification of molecular mode-coupling strengths, and also derive the criteria for complete band separation and perfect intermode intensity overlap. Our results imply that when estimating the performance of a multiwave slow-light device, the band dependency of group velocities must also be considered in addition to the conventional CROW dispersion. Numerical analysis with a photonic crystal platform shows excellent agreement with theory.

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One-Level Simplification Method for All-Optical Combinational Logic Circuits

Cited by 26 publications

References 11 publications

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

Simultaneous all-optical basic arithmetic operations using QD-SOA-assisted Mach–Zehnder interferometer

On the Feasibility of 320 Gb/S All-Optical and Gate Using Quantum-Dot Semiconductor Optical Amplifier-Based Mach-Zehnder Interferometer

Slow-light dispersion properties of multiatomic multiband coupled-resonator optical waveguides

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