Lossless Configuration Research Articles

Secure, Peer-To-Peer, lossless configurations

Investigators agree that homogeneous computations are a captivating new subject in the field of applies self-rule, and experts concur. In this work, we show the impression of multi-processors. Andean Rimer, our new technique for the examination of Boolean method of reasoning, is the response for these challenges.

PAM–ASK optical logic gates in an optical fiber Sagnac interferometer

In this work we performed a numerical study of optical logic gates based on a Sagnac interferometer, operating with short optical pulses (10ps) in a PAM–ASK modulation scheme with binary amplitude modulation scheme. We examined the performance of a nonlinear Sagnac interferometer implementing two-input logical functions. We evaluated the effect resulting from an increment in the PAM coding parameter offset (ε), considering the anomalous group velocity dispersion (GVD) and nonlinear self phase modulation (SPM) in a lossless configuration. By analysing the transmitted output, we conclude it is possible to obtain logic gates OR for two different power-splitting ratios ρ of the coupler (ρ=0.1 and 0.2). After this step, we applied a dephasing control to the input pulses, aiming to achieve logic gates with ρ=0.3 and ρ=0.4 and to enhance the study of cases in which they had not been previously obtained. We obtained OR and AND logic gates with a phase variation study for ρ=0.1 and 0.2. For ρ=0.3 and 0.4, the variety and versatility of logic gates proved to be very broad where OR, AND and XOR gates were obtained.

High Contrast Optical “OR” Logic Gates Using a Photonic Crystal Fiber Modulated by PAM-ASK

In this work, we present a numerical study of an all-optical logical gate based in a symmetric nonlinear directional coupler (NLDC) in Photonic Fiber Crystals (PCFs) PCFs operating with two ultrashort fundamental soliton pulses of 100 fs, modulated by PAM-ASK with binary amplitude modulation to represent the logical level 1 and 0. The performance of a symmetric dual core NLDCPCF to execute two-input logical functions is examined. We evaluate the effect resulting from an increment in the PAM coding parameter offset (ε), considering the anomalous Group Velocity Dispersion (GVD), third-order dispersion (β3) and nonlinear effects Self Phase Modulation (SPM), Self-Steepening (SS), lntrapulse Raman Scattering (IRS) in a lossless configuration. Our results indicate that is possible to get logical operations for the cores 1 or 2 using a phase control to the input pulse in one of the fibers.

Realization of All-Optical Logic Gates in a Triangular Triple-Core Photonic Crystal Fiber

We propose an all-optical logical gate based in a triple-core photonic fiber crystal operating with two ultrashort fundamental soliton pulses of 100 fs, with pulse amplitude modulation in the modality of amplitude shift keying (PAM-ASK) with binary amplitude modulation. In particular, we examine the performance of a triple-core PCF coupler to execute two-input logical functions. The pulse propagation is modelled by an extended nonlinear Schroedinger equation including the terms associated with the anomalous group-velocity dispersion (GVD) and the third-order dispersion (β3), as well as the nonlinear effects of self-phase modulation (SPM), cross-phase modulation (XPM), self-steepening, and intrapulse Raman scattering (IRS) in a lossless configuration. Our results indicate the possibility of getting logical operations by controlling the phase difference between the input pulses.

A performance study of an all-optical logic gate based in PAM-ASK

In this paper a numerical study of an all-optical logical gate based in a symmetric nonlinear directional coupler (NLDC) operating with two ultrashort fundamental soliton pulses of 2ps, modulated by PAM-ASK with binary amplitude modulation to represent the logical level 1 and 0, is presented. The performance of a symmetric dual core NLDC performing two-input logical functions is examined. Initially, we evaluate the effect resulting from an increment in the PAM coding parameter offset (ϵ), considering the anomalous Group Velocity Dispersion (GVD), nonlinear Self Phase Modulation (SPM) in a lossless configuration. We can conclude that is possible to get logical operations for the cores 1 or 2 since a phase control exists which is applied to the input pulse in fiber 1.

Optical short pulse switching characteristics of ring resonators

The nonlinear optical transmission of an optical ring resonator (ORR) operating in the soliton regime is investigated numerically. The transmission and the average compression factor of the switched pulses are analyzed. We present results of the study of the transmission characteristics of short optical pulses in an optical ring resonator. We show that the loss in the waveguide is leading to a decrease of the ORR transmission of short pulses. The use of a linear increase profile of the nonlinear index of refraction is leading to pulse compression or broadening, depending on the pump power. Operating the ORR at higher pump powers makes the compression factor to values around one. This is an indication that the switched pulse has the same time duration of the input pulse. For this configuration we can recover the ORR transmission, associated to the lossless configuration, and the switched pulse present the same time duration of the input pulse. The results are related to the recovery of the lossless optical characteristics of the ORR. The transmission characteristics and optical pulse shaping of the ORR will be of interest in future optical circuits applications.

Effects from the Thin Metallic Substrate Sandwiched in Planar Multilayer Microstrip Lines

This paper studies the dispersion characteristics of open multilayer microstrip lines with a thin highly-conductive metallic substrate using the spectral domain approach. From the numerical results, it is found that, in both lossy (metal-insulator-silicon structure such as Si-SiO2) and lossless configurations (thin metal between lossless dielectric microstrip line), at the low frequency range, this thin metallic substrate can excite slow waves. And accordingly the frequency dependent transmission-line characteristics of interconnects, such as propagation constant, attenuation and the characteristic impedance, can change remarkably with the existence of the thin metallic substrate.

Multiple-frequency distorted-wave Born approach to 2D inverse profiling

The present paper deals with the inversion from experimental data provided byInstitut Fresnel, France. The distorted-wave Born iterative approach is applied tothe reconstruction of two lossless configurations involving dielectric circularcylinders. The dynamic range and the resolution of this scheme are governed bythe operating frequency. For a low frequency, the dynamic range is large and theresolution is limited; raising the frequency improves the resolution at thecost of dynamic range. To obtain a high resolution for a large contrast,scattered-field information at multiple frequencies can be used. This isdemonstrated for two cases where a direct inversion does not lead to convergence.