Ultra-fast all-optical 2-to-4 decoder based on a photonic crystal structure

Maleki, Mohammad Javad; Soroosh, Mohammad; Mir, Ali

doi:10.1364/ao.392933

Cited by 47 publications

(11 citation statements)

References 56 publications

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“…Unlike the two previous decoders with square lattice [7,8], the two following decoders [9,10] present a triangular lattice of the two-dimensional photonic crystal (a) A top view of the structure including four resonant cavities connected to W5, W6, W7, and W8 [7] (b) magnifying the cross-connection for inputs X and Y [7].…”

Section: Cavity-based Structuresmentioning

confidence: 99%

See 1 more Smart Citation

Photonic crystal-based decoders: ideas and structures

Javad Maleki,

Soroosh,

Parandin

et al. 2023

Recent Advances and Trends in Photonic Crystal Technology

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Recent developments in photonic crystal structures have enabled the implementation of optical decoders which possess superior features such as high contrast ratio and fast response. According to published reports, photonic crystal-based decoders exhibit contrast ratios higher than 20 dB and a response time as fast as 200 fs, making them an ideal candidate for high-speed processing applications. Resonant cavities and rings can be utilized to drop waves with high efficiency, thereby simplifying circuits and reducing the need for cross-connections. In this chapter, we provide an introduction to the decoding operation and its importance in various applications, followed by a discussion of fundamental features of photonic crystals such as photonic bandgap and the optical Kerr effect. We also consider the role of resonance in photonic crystals and present recent ideas and designed structures for the benefit of readers.

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Section: Cavity-based Structuresmentioning

confidence: 99%

“…As shown in Figure 5b, the proposed structure [10] consists of two input ports (X, Y), and one bias port Z to apply the incoming optical signals. Four waveguides (W1, W2, W3, and W4) transmit the optical waves to the W5 waveguide.…”

Section: Cavity-based Structuresmentioning

confidence: 99%

Photonic crystal-based decoders: ideas and structures

Javad Maleki,

Soroosh,

Parandin

et al. 2023

Recent Advances and Trends in Photonic Crystal Technology

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show abstract

“…where t r and t f are the rise time and the fall time, respectively. In all-optical logic gates, it can be said that the rise time will always be longer than the fall time [18]. Considering the propagation delay time (t p ), the response time can be given by:…”

Section: Important Parameters In Evaluating the Efficiency Of All-optical Logic Gatesmentioning

confidence: 99%

Proposal of a Cascade Photonic Crystal XOR Logic Gate for Optical Integrated Circuits with Investigation of Fabrication Error and Optical Power Changes

Mohebzadeh-Bahabady

Olyaee

2021

Photonics

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A compact and simple structure is designed to create an all-optical XOR logic gate using a two-dimensional, photonic crystal lattice. The structure was implemented using three waveguides connected by two nano-resonators. The plane wave expansion method was used to obtain the photonic band gap and the finite-difference time-domain method was used to investigate the behavior of the electromagnetic field in the photonic crystal structure. Examining the high contrast ratio and high-speed cascade, all-optical XOR on a chip, the effects of fabrication error and the changes in the input optical power showed that the structure could be used in optical integrated circuits. The contrast ratio and data transfer rate of the cascade XOR logic gate were respectively obtained as 44.29 dB and 1.5 Tb/s. In addition, the designed structure had very small dimensions at 158.65 μm2 and required very low power to operate, which made it suitable for low-power circuits. This structure could also be used as a NOT logic gate. Therefore, an XNOR logic gate can be designed using XOR and NOT logic gates.

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“…The property of PBG is used to design many logic circuits, which can be referred to as all types of logic gates. So far, many circuits have been reported for designing optical logic gates such as NOT, OR, AND, XOR, XNOR [16][17][18][19][20][21]. Also, combined circuits, such as decoder, encoder, multiplexer, adder, and subtractor, have been designed using photonic crystals .…”

Section: Introductionmentioning

confidence: 99%

A New Proposal for High Contrast Ratio All-Optical 4 × 2 Encoder Using 2D Photonic Crystals

Parandin

Chimawi

2023

Preprint

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Optical encoders are widely used circuits that are used in digital circuits. One of the most critical features of an optical encoder is the power values in two logic states, low and high. The difference between these two values is expressed with the Contrast Ratio (CR) parameter. In this research, an optical encoder with four inputs and two outputs based on a two-dimensional photonic crystal has been designed and simulated. The results show that the proposed structure has low power in low mode and high intensity in high mode. This difference in two logical modes has caused the proposed encoder to have CR = 19.8dB, which is improved compared to previous works. Also, the proposed structure has a very small size, equal to 96.88 µm2. This encoder can be used in optical integrated circuits with low error according to the obtained values.

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Ultra-fast all-optical 2-to-4 decoder based on a photonic crystal structure

Cited by 47 publications

References 56 publications

Photonic crystal-based decoders: ideas and structures

Photonic crystal-based decoders: ideas and structures

Proposal of a Cascade Photonic Crystal XOR Logic Gate for Optical Integrated Circuits with Investigation of Fabrication Error and Optical Power Changes

A New Proposal for High Contrast Ratio All-Optical 4 × 2 Encoder Using 2D Photonic Crystals

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