The practical realization of smart optical filters, i.e. devices which change their optical transmission in a suitable way to keep a working state for a general light sensitive element , can involve the use of conjugated molecules whose light absorption properties are lightintensity dependent (nonlinear optical effect). The verification of optical limiting displayed by some particular conjugate...

We present an optical shift register that consist out of two serially connected optical flip-flop memories driven by common clock pulses. Each optical flip-flop consists out of two ring lasers sharing a single active element, which makes the optical flip-flops easily cascade with each other. The two cascaded optical flip-flops are controlled by the clock pulses in such a way that the input data...

This paper focuses on the recent research in optical communications and the effects of fiber non linearities in optical communication. Moreover, this paper covers the investigation on characteristics of optical fiber, modelling/analysis of fiber nonlinearities and laser effect on optical fiber in the literature. This paper also provides the information about the parameters, methodology and mate...

In this paper we introduce simulation of optical multi-element antennas that enable mobility and high bandwidth in Free Space Optical (FSO) networks. The challenge of FSO is to build systems that can tackle line of sight (LOS) alignment and maintenance issues. By addressing these critical aspects of LOS alignment in such networks, we demonstrate the potential for mobility by simulation. We can ...

This paper dedicated to analysis and review of literature for today’s technology and future aspects of optical networks. This in depth analysis of today’s SONET/SDH Architecture and Reconfigurable structures for SONET rings has been discussed so that one can formulate the next generation SONET/SDH networks. Network layers are analyzed for their design and issues of researches, while dense wavel...

An array of semiconductor quantum dots is studied computationally using an approach that couples linear elasticity to electronic and optical properties. The effect of strain on the photoemission behavior of the quantum dot array is of particular interest. With a realistic quantum dot array morphology as input, finite element analysis is first used to compute electron energy levels in the domain...

A design for a subwavelength all-optical frequency mixer is proposed. The method relies on enhanced difference-frequency generation, which is achieved in two steps with the help of plasmonic nanoantennas. The interaction of the two input signals with the nonlinear material is increased through the use of input nanoantennas, which focus the incident energy of two different frequencies onto the n...

Dense spatial sampling is required in high-resolution optical imaging and many other biomedical optical imaging methods, such as diffuse optical imaging. Arrayed photodetectors, in particular charge coupled device cameras are commonly used mainly because of their high pixel count. Nonetheless, discrete-element photodetectors, such as photomultiplier tubes, are often desirable in many performanc...

This paper demonstrates an approach for laser holographic patterning of three-dimensional photonic lattice structures using a single diffractive optical element. The diffractive optical element is fabricated by recording gratings in a photosensitive polymer using a two-beam interference method and has four diffraction gratings oriented with four-fold symmetry around a central opening. Four firs...