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Showing papers in "Optik in 2010"


Journal ArticleDOI
01 Apr 2010-Optik
TL;DR: In this article, a simulative analysis of 40-bit-rate DWDM system with ultra high capacity upto 1.28-Tb/s has been carried out for carrier-suppressed return-to-zero (CSRZ), duobinary return to zero (DRZ) and modified duobbinary return-of-zero modulation formats.

86 citations


Journal ArticleDOI
01 Oct 2010-Optik
TL;DR: In this article, an optical design approach of a freeform TIR (total internal reflection) lens for the LED streetlight is investigated with these freeform lenses, high output efficiency, even light distribution, and batwing far field beam angle distribution can be achieved.

77 citations


Journal ArticleDOI
01 Apr 2010-Optik
TL;DR: The authors propose a scheme for implementing different logic operations adopting frequency based encoding technique, where the second harmonic generation and difference frequency generation techniques are used by exploiting the non-linear response character of some materials.

46 citations


Journal ArticleDOI
01 Apr 2010-Optik
TL;DR: A new method for color image encryption by wavelength multiplexing on the basis of two-dimensional (2-D) generalization of 1-D fractional Hartley transform that has been redefined recently in search of its inverse transform is proposed.

43 citations


Journal ArticleDOI
Qiong Wang1, Yiping Cui1, Jiayu Zhang1, Changchun Yan1, Lingling Zhang1 
01 Apr 2010-Optik
TL;DR: In this paper, the propagation states of electromagnetic waves in heterostructure coupled waveguides produced by appropriately modulating the refractive index of rods were analyzed and the position effect of the HOGs on the switch function was investigated, showing that the output state is the result of the integral effect of different coupling regions.

42 citations


Journal ArticleDOI
01 Sep 2010-Optik
TL;DR: In this article, a blue-emitting phosphor, BaMgAl10O17:Eu2+ (BAM) and a yellow-orange phosphor Ba2+-codoped Sr3SiO5: Eu2+) were prepared by the solid-state reaction.

40 citations


Journal ArticleDOI
01 May 2010-Optik
TL;DR: In this article, the dispersion properties and electric field distribution of the fundamental mode were calculated by using the full-vector finite element method (FVFEM) and simulation results indicate that the zero-dispersion wavelength of the chloroform-filled PCF is adjustable around 800 nm.

40 citations


Journal ArticleDOI
Y. H. Huang1, Lei Liu1, F.C. Sham1, Y.S. Chan1, S.P. Ng1 
01 Oct 2010-Optik
TL;DR: Wang et al. as mentioned in this paper developed a handy, reliable and cost-effective method for concrete property evaluation based on an optical technique called automatic digital image correlation (ADIC), which acts as an optical strain gauge.

38 citations


Journal ArticleDOI
01 Feb 2010-Optik
TL;DR: The paper offers a brand-new thought and practical way of reducing the speckle noise in the reconstructed image of digital holography and applies the Wiener filtering to reduce the additive noise.

37 citations


Journal ArticleDOI
01 Sep 2010-Optik
TL;DR: It is shown that RZ and CS-RZ formats are more tolerant than NRZ format in the same conditions, and a comparison of their spectra and waveforms makes.

37 citations


Journal ArticleDOI
01 Sep 2010-Optik
TL;DR: This paper combines the attractive and powerful parallelism property of the modified signed-digit (MSD) number representation with the ultra-fast all-optical switchingproperty of the semiconductor optical amplifier and Mach–Zehnder interferometer to design and implement all-Optical MSD adder/subtracter circuits.

Journal ArticleDOI
01 Jun 2010-Optik
TL;DR: In this paper, the optimal shape parameters for hyperboloidal and ellipsoidal cases were obtained, respectively, when the concentrator tracing errors are 0°, 0.5° and 1°.

Journal ArticleDOI
01 Jun 2010-Optik
TL;DR: In this article, the propagation characteristic of a chiral fiber having helical windings at the core-cladding boundary is analyzed in respect of the relative distribution of power over the sustained modes.

Journal ArticleDOI
01 Jun 2010-Optik
TL;DR: A new high negative dispersion photonic crystal fiber is proposed in this article, which has double-core structure and double germanium-doped region, the inner core is formed by removing the 3rd ring air-holes around the core.

Journal ArticleDOI
01 Nov 2010-Optik
TL;DR: In this paper, a design of all-optical switches based on one-dimensional photonic crystals (1D PhC) doped with nonlinear optical materials is presented, which is composed of a PhC cavity sandwiched by two accessional PhC microcavities.


Journal ArticleDOI
01 Jun 2010-Optik
TL;DR: A novel measurement scheme for a three dimensional (3D) object's surface boundary perimeter is proposed and an experiment on a bent surface's perimeter measurement indicates that this scheme's measurement repetition error decreases to 0.6%.

Journal ArticleDOI
01 Sep 2010-Optik
TL;DR: A method of implementing frequency-encoded inversion logic operations with tristate logic using reflecting semiconductor optical amplifiers (RSOA) is proposed.

Journal ArticleDOI
01 Jan 2010-Optik
TL;DR: In this paper, the inherent aberrations of 90° off-axis parabolic mirrors (OAPMs) are investigated and different combinations of OAPMs for collimating and focusing the THz radiation are investigated.

Journal ArticleDOI
01 Sep 2010-Optik
TL;DR: Robustness of the proposed technique has been evaluated in terms of the chaotic maps, the number of the Chaos maps used to generate the CRPM, the rotation angle of the gyrator transform and the seed values of the chaos random phase masks.

Journal ArticleDOI
01 Mar 2010-Optik
TL;DR: A novel system of quantum key generation via a micro ring resonator for mobile telephone network use, where the conversation messages can be secured by using a quantum code/decode (CODEC) technique incorporated in the public networks.

Journal ArticleDOI
01 Nov 2010-Optik
TL;DR: In this paper, a rod-in-air square-lattice photonic crystal optical switch was proposed, where the position of a single rod along the diagonal line of the intersection area of two removed cross-lines of rods determines how much incident energy goes into different channels.

Journal ArticleDOI
01 Oct 2010-Optik
TL;DR: The anomalous dispersion in one-dimensional plasma photonic crystals (1-DPPCs) is studied in this article, where the width of band pass and band gap are compressed, the phase velocity decreases and the cup-off frequency comes close to the frequency of plasma when EM wave oblique incidence on 1-DPCs.

Journal ArticleDOI
01 Jun 2010-Optik
TL;DR: A new method for image encryption using improper Hartley transform and chaos theory and two chaotic random intensity masks is proposed and the mean square error has been calculated.

Journal ArticleDOI
01 Apr 2010-Optik
TL;DR: It has been shown that the proposed algorithm “less weight to maximum empty and nearest” gives the least blocking probability as compared to the other dynamic routing algorithms for random, most used and least used wavelength assignment strategies.

Journal ArticleDOI
01 Aug 2010-Optik
TL;DR: In this paper, the applicability ranges of phase-recovering algorithms corresponding to different phase-shifting methods were studied with different intensity saturation coefficients by a simulative method.

Journal ArticleDOI
01 May 2010-Optik
TL;DR: In this paper, the dispersion compensation techniques are compared on the basis of eye opening, eye closure, bit error rate and Q-factor in CSRZ system, which operates at bit rates of 2.5, 5, 10, 15 and 20 Gbps.

Journal ArticleDOI
01 Dec 2010-Optik
TL;DR: The developed neural-network optical model effectively expedites the LGP prism-pattern design and is demonstrated by the case study of a 13 in.

Journal ArticleDOI
01 Oct 2010-Optik
TL;DR: In this paper, a nonlinear photonic crystal directional coupler was analyzed by the finite difference time domain method and the authors tried to increase the coupling efficiency and also reduce the coupling length in linear and nonlinear states in this device.

Journal ArticleDOI
01 Jan 2010-Optik
TL;DR: An overview of the utilization of fractals in physical optics, especially of Koch fractals and their diffractals, is given in this paper, where the most typical Koch curves are also depicted.