Abstract
Implementation of switching activity in the all-optical domain is an essential aspect of modern high-speed and secured communication technology. Micro-ring Resonator (MRR) based switching activity can be used to implement all-optical active low tri-state buffer logic and clocked D flip-flop. The paper describes the switching activity of micro-ring resonator structures. The switching activity is further used to implement the effective all-optical 4-bit memory register using the appropriate arrangement of all-optical tri-state buffers and clocked D flip-flops with the functionality of read (RD) and write (WR). The complete description of layouts and switching mechanisms of all-optical 4-bit memory registers have been explained, and appropriate MATLAB simulation results are presented to observe the suitability of the proposed unit. The analysis shows that implementation of tri-state buffer logic and D flip-flop assisted 4-bit memory register in the all-optical domain includes the considerable advantages of optical communication, e.g., immunity to electromagnetic interference, parallel computing, compactness, signal security, etc. The manuscript describes the detailed analysis of performance parameters, e.g., extinction ratio, contrast ratio, amplitude modulation, on–off ratio, and switching speed of micro-ring resonator structures to efficiently select device parameters. Finally, it describes an efficient technique to implement all-optical MRR based $$1\times 4$$ 1 × 4 memory registers.
Highlights
All-optical switching and computations have been widely investigated in optical digital circuits and optical sensors
A novel design technique to implement the photonic D-type flip-flop based on silicon micro-ring resonator as basic building blocks are investigated and it was observed that, carrier injection forward-biased PIN waveguide resonance phenomena can be used to generate the logic of D flip-flops [19]
The important performance effecting parameters e. g. free spectral range, 3-dB bandwidth (FWHM), Finesse, Quality factor, On-off ratio, Extinction ratio (ER), Contrast ratio (CR), Amplitude modulation (AM), and switching speed are optimized by selecting the appropriate values of the most important device parameter of micro-ring resonator (MRR), which is coupling coefficients (k1,k2) and radius of MRR
Summary
All-optical switching and computations have been widely investigated in optical digital circuits and optical sensors. The electro-optic effect-based logic gates using a single micro-ring resonator structure is one of the efficient techniques. A novel technique to realize directed optical digital logic gate based on the structure-based free carrier distribution principles, changes in the refractive index of the waveguide, and the scattering analysis on the micro-ring resonator coupling region, are clearly described [16]. A novel design technique to implement the photonic D-type flip-flop based on silicon micro-ring resonator as basic building blocks are investigated and it was observed that, carrier injection forward-biased PIN waveguide resonance phenomena can be used to generate the logic of D flip-flops [19]. The proposed scheme theoretically describes the application of an ultra-fast MRR based memory register which provides the optimum results including the additional advantage of all-optical switching phenomena. In this paper we have represented an ideal technique to implement the alloptical 1 × 4 R/W memory register, using a simple micro-ring resonator structure as a switching element
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