Showing papers in "Optics Communications in 2013"

TL;DR: In this paper, the temperature dependence of the fluorescence intensity ratio (FIR) of emission bands centered at 525 and 545 nm was measured in the temperature range of 160-300 ǫ K under excitation of a 980-nm diode laser.

TL;DR: In this article, the design of an AND optical logic gate based on two dimensional triangular lattice of air holes in Si has been reported, which is favorable for large scale optical integration and can potentially be used in on-chip photonic logic integrated circuits.

TL;DR: In this paper, the density, refractive index and polaron radius of samarium doped lead−zinc-phosphate glasses were calculated by melt quenching technique.

TL;DR: A novel speckle noise reduction algorithm based on block-matching 3D filter modified by morlet wavelet decomposition is proposed, which achieves good performances in terms of signal- to-noise ratio, equivalent number of looks, contrast-to-no noise ratio, edge preservation coefficient, and CPU time.

TL;DR: By intentionally combining the porous fiber and the air-core photonic bandgap fiber, a kind of porous core photonic Bandgap fiber for guiding terahertz (THz) wave is proposed in this paper.

TL;DR: In this paper, an explicit expression for the scintillation index of a multi-Gaussian Schell-model (MGSM) beam in weakly or extremely strong turbulent atmosphere is derived with the help of a tensor method.

TL;DR: In this paper, a fiber Fabry-Perot interferometer (FPI) for humidity measurement based on a Polyvinyl alcohol (PVA) film is proposed and experimentally demonstrated.

TL;DR: In this paper, the absorption spectrum properties of Sm 3+ ions in phosphate-based glasses were investigated through SEM with EDS, X-ray diffraction (XRD), differential thermal analysis (DTA), Fourier transform infrared (FTIR), Raman, absorption, emission and decay measurements.

TL;DR: In this article, the behavior of a nanoscale refractive index sensor in two-dimensional plasmonic waveguide with nanodisk resonator, using the numerical method of finite difference time domain (FDTD), is analyzed and simulated.

TL;DR: Improved investigation through implementation of a square root module using OPTISYSTEM™ simulator to establish an inter-satellite link (ISL) between two satellites estranged by a distance of 1000 Km at data rate of 2.5 Gbps which is not reported in previous investigated work.

TL;DR: In this paper, an analytical expression for the dependence of threshold pump power for a particular Laguerre-Gaussian (LG0n) mode on the spatial overlap with the pump beam is derived.

TL;DR: The diffusion performance is significantly enhanced and the overall security of the image cryptosystem is improved, and the plain-text sensitivity of the new algorithm is promoted.

TL;DR: In this article, the decay rate of Sm 3+ ion in K-Mg-Al phosphate glass has been analyzed using free-ion Hamiltonian model and the results indicate that the energy transfer process is dipole-dipole type, which is well-fitted to Inokuti-Hirayama model for S = 6.

TL;DR: A new image encryption algorithm based on singular value decomposition and Arnold transform and inverse Arnold transformed corresponding times, multiplied in correct order and inverse fractional Fourier transformed with right fractional orders is proposed.

TL;DR: In this article, the authors investigated modulation instability in metamaterials with both cubic and quintic nonlinearities, based on a model appropriate for pulse propagation in MM with cubic-quintic non-linearities and higher order dispersive effects.

TL;DR: It is shown that amplitude- and phase-truncation-based optical asymmetric cryptosystem is vulnerable to known-plaintext attack and the vulnerability is proved through the results of computer simulation.

TL;DR: A generalization of the Principal Component Analysis demodulation method that relaxes the PCA and AIA limitations combining both methods is presented and applied to simulated and experimental interferograms obtaining satisfactory results.

TL;DR: In this article, the optical bistability of a quantum dot molecule under coherent excitation and considering the spontaneous exciton decay and pure dephasing as two decoherence channels was investigated.

TL;DR: Based on the fullpotential linearized augmented plane wave (FLAPW) method, Wang et al. as mentioned in this paper studied the electronic structure and optical properties in the Cu-doped CdS semiconductor.

TL;DR: In this paper, a Mach-Zehnder interferometer strain sensor made from pieces of photonic crystal fiber spliced to standard single mode fibers is fabricated with different lengths.

TL;DR: In this paper, a dual-band 90° polarization rotator is proposed by using chiral metamaterial composed of two pairs of two-layered twisted split ring resonators (SRRs) in each unit.

TL;DR: A single circuit consisting of 4 micro-ring resonators capable to perform 3 bit parity generator and checker operations is studied and reported, which makes proposed circuit design compact, simple and will be helpful in designing all optical integrated circuit in future.

TL;DR: In this article, the production and characterization of narrow bandwidth fiber Bragg gratings (FBGs) in different spectral regions using polymer optical fibers (POFs) is reported. And the obtained 3-dB bandwidth varies from 0.22 down to 0.045 nm considering a Bragg grating length between 10 and 25mm, respectively.

TL;DR: In this paper, a 3×3 partial Mueller matrix was obtained by using nine linear polarization measurements, and the limitation on spectral coverage imposed by quarter wave plates required for circular polarization measurements was avoided.

TL;DR: In this article, a high extinction ratio polarization beam splitter based on multimode interference coupler has been obtained on silicon-on-insulator, which has footprint of 8.16μm×1034μm.

TL;DR: A new physical layer for the implementation of indoor femtocell – optical femtocells by LED-based visible light communication by adopting the dimming compatible variable-PPM modulation suggested by the IEEE standard is proposed.

TL;DR: In this paper, an optical liquid level sensor based on the surrounding medium refractive index (SRI) sensing using an excessively tilted fibre grating (ETFG) was proposed and demonstrated.

TL;DR: In this paper, a modified Michelson Interferometer is used to measure out-of-plane deformation and its first derivative simultaneously, which can then be determined from a single speckle interferogram by properly selecting filters for spectrum image.

TL;DR: In this paper, the performance of a free space optical (FSO) communication system is analyzed by considering heavy atmospheric losses such as scattering, absorption, channel fading and misalignment fading.

TL;DR: In this article, a photonic crystal fiber (PCF)-based in-fiber Mach-Zehnder interferometer (MZI) and a fiber Bragg grating (FBG) were used for simultaneous measurement of humidity and temperature.