Showing papers in "Optics Communications in 2005"

TL;DR: A multi-step quantum secure direct communication protocol using blocks of multi-particle maximally entangled state is proposed, which has the advantage of high efficiency and high source capacity.

TL;DR: The optical nonlinear absorption of the aqueous solution of platinum nanospheres protected by poly (N -vinyl-2-pyrrolidone) was investigated using open aperture Z-scan method with nanosecond pulse laser at the wavelength of 532 nm.

TL;DR: In this article, it was shown that the state of polarization of the polarized portion of a random, statistically stationary, electromagnetic beam may change on propagation, even in free space, even when the beam is a Gaussian Schell model.

TL;DR: In this paper, the propagation of a multi-terawatt femtosecond laser pulse in air is studied as a function of initial chirp, and conditions for optimising air ionisation at long distance are presented.

TL;DR: In this article, a theoretical analysis of sensitivity and signal-to-noise ratio (SNR) of a step-index fiber optic surface plasmon resonance sensor with bimetallic layers (silver and gold) was carried out.

TL;DR: In this paper, the spectral absorption profile of a material such as a rare-earth-ion-doped crystal can be manipulated to efficiently absorb and subsequently reemit a wave-packet, in a photon echo-like process.

TL;DR: In this paper, the authors derived necessary and sufficient conditions which the parameters of the source must satisfy in order to generate a physically realizable beam of this type, which provided certain constraints for synthesis, simulations and any application of such beams.

TL;DR: In this article, a numerical study of supercontinuum generation in a single-mode optical fiber was conducted and it was shown that the modulation instability is responsible for the generation of ultrabroadband octave-spanning continua for pico-and sub-picosecond pulses in the anomalous-as well as in the normal dispersion region.

TL;DR: In this article, a microlens array made of polymer/nanosized polymer-dispersed liquid crystal (nano-PDLC) was demonstrated, which is a broadband device and its performance is independent of light polarization.

TL;DR: In this paper, a statistical model of nanoprecursors threshold distribution for the interpretation of laser-damage probability curves is investigated, where each kind of precursor is characterized by a Gaussian distribution of threshold.

TL;DR: In this paper, the photon pairs from a pulsed parametric down-conversion source were coupled into single-mode fibers and the presence of one photon in its fiber was detected with a probability of 83%.

TL;DR: In this paper, the authors theoretically study the transfer of energy from a fiber mode to surface plasmon polaritons at the silver/air interface in the taper region of a silver-coated fiber tip.

TL;DR: A new fuzzy linking method of color histogram creation is proposed based on the L*a*b* color space and provides a histogram which contains only 10 bins, which proves that the proposed method is less sensitive to various changes in the images than other methods of histograms creation.

TL;DR: In this paper, a high-efficiency 461 nm blue light conversion from an external cavity-enhanced second-harmonic generation of a 922 nm diode laser with a quasi-phase-matched KTP crystal (PPKTP) was reported.

TL;DR: In this article, a terahertz (THz) spectroscopic imaging system using a GaP THz-wave generator with automatic scanning control was presented, and power-transmission imaging measurements were taken.

TL;DR: In this paper, it was shown that the second-order electric spectral correlation matrix at any point in such a field may be uniquely expressed as the sum of three matrices, the first of which represents a completely polarized contribution.

TL;DR: Based on the fractional wavelet transform (FWT), a novel method for the image encryption is proposed that encrypts the image by two fractional orders and a series of scaling factors and realizes the partial encryption by using this method.

TL;DR: In this article, the authors developed thermo-optic in-line extinction modulators (ILEMs) whose operation is based on the guiding of long-range surface plasmon polaritons (LRSPPs) along metal stripes embedded in polymer and heated by electrical signal currents.

TL;DR: In this paper, the third-order nonlinear optical properties of CdSe and ZnS core-shell quantum dots in solution with toluene were studied over a spectrum ranging from 450 to 680 nm using 225-fs pulses.

TL;DR: In this article, the authors proposed a discrete fractional random transform based on a generalization of the DFT with an intrinsic randomness, which is used for image encryption and decryption.

TL;DR: A novel method of multiple image encryption and watermarking by random phase matching, which can encrypt and then decrypt more than one image with the same set of transmitted patterns based on the idea of double phase encoding and the wave field superposition is proposed.

TL;DR: In this paper, a new class of nano-photonics for possible χ 3 ( ω ) applications have been synthesized by pulsed laser ablation and optically characterized.

TL;DR: In this paper, the formation of spiral phase elements producing helical beams with different topological charges is presented, which consist of discrete space-variant subwavelength dielectric gratings.

TL;DR: In this article, a number of Jacobian elliptic function solutions of nonlinear Schrodinger equations with variable-coefficient F-expansion are presented, which serve as a seeding set of solutions which could be useful in other optical studies.

TL;DR: In this paper, an optical low-coherence reflectometer with two linked reference arms for optical coherence tomography (OCT) application is presented. And the potential of the configuration in shortening A-scan time by factor 0.5 through simultaneous specimen multiple delay scanning is also explored.

TL;DR: The time evolution of processes that show the dynamic speckle phenomenon are characterized using wavelets based entropy and employed in order to make quantitative and qualitative measurements of the sample activity.

TL;DR: In this article, the Fourier Transform Infrared, optical absorption, photoluminescence and open aperture z-scan measurements have been performed to characterize the linear and non-linear optical properties.

TL;DR: Comparing with single FRT encryption, the security using this method for optical image encryption is greatly improved due to the introduction of the pixel scrambling technique.

TL;DR: In this article, the authors developed a simple method for whole field out-of-plane displacement measurement using only one camera and employed digital image correlation (DIC) to calculate an apparent inplane displacement field which is introduced by magnification change due to an unknown out of plane displacement.

TL;DR: In this paper, a theoretical analysis of the correctness of applying the effective medium approximation (EMA) at the ellipsometric studies of rough surfaces is presented within this analysis the Rayleigh-Rice theory (RRT) is used to calculate the simulated ellipsomet data of various slightly randomly rough surfaces This simulated data are treated using the least-squares method for finding the values of the parameters characterizing the rough surfaces within the EMA, i.e. values of thickness and packing density factor describing a fictitious (effective) thin films replacing these surfaces within EMA.