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In this paper, we have proposed a novel nanophotonic device for nonlinear applications in the visible range. The proposed device is a photonic crystal fiber nanowire composed of highly transparent silica with a germania doped silica as core material. Numerical analysis has confirmed that the proposed nonlinear device has a maximum Raman gain coefficient of 1324 W-1km-1 with a nonlinearity parameter...
This paper describes the effect of Differential Phase Shift Keying (DPSK) modulation on Four-Wave Mixing (FWM) in a multi-channel, long-haul optical fibre communication system that employs Wavelength Division Multiplexing (WDM). The performance of NRZ-DPSK and the commonly used NRZ-Intensity Modulation with Direct Detection (IMDD) are compared in the presence of FWM, while the factors that influence...
This paper presents microcontroller based schematic circuit design of a complete duobinary encoder (duobinary code from binary bit) and duobinary decoder (binary from duobinary code) for data communication system. Binary code having two levels of bit sequence 1 and 0. On the other side Duobinary (DB) is a three-level code having 1, 0 and -1 levels. Using duobinary transmission instead of binary transmission,...
The application area of photonics (semiconductor) devices are expanding, especially in the area of next optical communication, imaging, and energy generation. This paper describes the trends of key photonic devices technologies for communication, imaging, and energy generation. The state-of-the art of technologies in each mentioned applications are included. Focused are mainly on the common device...
Performance analysis is carried out for all optical wavelength converter based on cross-phase modulation in a HNL Fiber followed by a MZI. Analysis has been carried out to find the output converted signal and the crosstalk due to the wavelength converter. The expression for signal to crosstalk ratio and the efficiency of wavelength conversion are derived. The performance results are evaluated numerically...
In wavelength division multiplexing (WDM) optical transmission system, crosstalk due to cross-phase modulation (XPM) is one of the most significant nonlinear effect. On the other hand in a first order group velocity dispersion (GVD) compensated system, second order GVD also restricts bit rate. This paper presents an analytical treatment of XPM effect in presence of second order GVD in WDM fiber-optic...
We suggest a new way for solving the minimum hitting set problem by using massive parallelism of light. The idea is to build a device which will generate all possible solution set and then selecting the correct one. The device has a graph like structure. There are several nodes connected by arcs (optical fiber). The light ray passing through an arc is delayed by some predefined time represented by...
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