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Showing papers in "Optics Communications in 1998"


Journal ArticleDOI
TL;DR: In this article, it is shown that a nondiffracting beam disturbed by an obstacle is able to reconstruct its initial amplitude profile under free propagation, and simple theoretical explanation, numerical simulation and experimental verification of the effect are presented.

459 citations


Journal ArticleDOI
TL;DR: In this article, the authors present results of near-field imaging with ultrashort, broadband far-infrared pulses. And they focus the radiation into a tapered metal tip with a small exit aperture and scan a sample in the near field of this aperture.

358 citations


Journal ArticleDOI
TL;DR: In this article, a new modification of external optical feedback OFB was used to narrow the line of a diode laser DL, where a "whispering gallery" WG mode of a high-Q microsphere was excited by means of frustrated total internal reflection.

231 citations


Journal ArticleDOI
TL;DR: In this paper, a comprehensive analysis of the statistical properties of the radiation from a self-amplified spontaneous emission (SASE) free electron laser operating in linear and nonlinear mode is presented.

228 citations


Journal ArticleDOI
TL;DR: In this paper, an interferometric method for the detection of the phase shifts of reflected light under surface plasmon resonance (SPR) conditions due to refractive index changes is proposed and experimentally realized.

200 citations


Journal ArticleDOI
TL;DR: In this paper, the authors demonstrate the tuning of high-Q optical whispering gallery modes in a fused silica microsphere by applying mechanical strain, and demonstrate the tunability of mode frequencies in this high Q solid-state microcavity expands its applicability in quantum optics and photonics.

193 citations


Journal ArticleDOI
TL;DR: In this paper, the authors compare delayed self-homodyne and self-heterodyne detection in the case of a time delay of the order of the coherence time of the laser.

191 citations


Journal ArticleDOI
TL;DR: In this article, a combination of two solid state lasers; the alexandrite (0.73 −0.75 μm) laser and the LiF:F2++** ( 0.8 −1.2μm) color center laser, was used to generate middle infrared radiation, tunable over the 3.5 −8.5 μm spectral range.

171 citations


Journal ArticleDOI
TL;DR: In this article, the authors describe a method for creating an arbitrary coherent superposition of two atomic states in a controlled and robust way by using a sequence of three pulses in a four-state system.

170 citations


Journal ArticleDOI
TL;DR: In this paper, a femtosecond terawatt Ti:sapphire chirped-pulse-amplification (CPA) laser was suppressed by injecting clean microjoule seed pulses into the regenerative amplifier.

163 citations


Journal ArticleDOI
TL;DR: In this paper, the authors demonstrate the effect of the beat effect on partial coherence interferometry (PCI) signal peaks and discuss the implications of this effect for optical coherence tomography of human retina.

Journal ArticleDOI
TL;DR: Tm:YAP was observed to operate multiline in the range 1.965 to 2.020 μm, whereas the holmium lasers operated on a single transition, whereasThe markedly different temporal behaviour of the single and double-doped crystals is analysed and discussed.

Journal ArticleDOI
TL;DR: In this article, a simple method to produce a hollow laser beam for applications in atom trapping using an axicon was demonstrated, and the beam profile had the shape of a ring with a diameter of ∼800 μm and a width of 35 μm.

Journal ArticleDOI
TL;DR: In this paper, a modification of a single beam optical trap was proposed to enable more effective axial trapping of nanoparticles, where interference of an incident wave and the wave reflected by the bottom of the trapping cell was employed to create a standing wave trap.

Journal ArticleDOI
TL;DR: In this paper, high-order Laguerre-Gaussian (LG) laser modes at 780 nm from a simple external-cavity diode laser are demonstrated.

Journal ArticleDOI
TL;DR: In this paper, computer-simulated results of an electromagnetic field near the apex of a metallic probe of an apertureless near-field scanning optical microscope are shown under some different conditions.

Journal ArticleDOI
TL;DR: In this paper, the analytical conditions for stationary propagation of a Gaussian pulse in a fiber with strong dispersion management were obtained using the variational method, and a good agreement between the two has been demonstrated.

Journal ArticleDOI
TL;DR: In this article, the two-photon excitation dynamics of two new dyes, N, N -diphenyl-7-[2-(4-piridinyl) ethenyl]-9,9-di- n -decyl-fluoren-2-amine (AF50) and (7-benzothiazol-2,yl-9, 9-diethylfluoren- 2-yl)-9, nine, 9

Journal ArticleDOI
TL;DR: In this article, the effect of pinhole size on the detected intensity of polarizing microscopes is discussed and a theory for point resolution of these microscopes was also presented and results are analyzed.

Journal ArticleDOI
TL;DR: In this article, the effects of quantum interference from spontaneous emission in the creation of atomic coherence in a closed V-type system were studied and it was shown that the absorption and dispersion properties of this atom can be significantly modified if this interference is optimized.

Journal ArticleDOI
TL;DR: In this article, a hexagonal unit-cell structure was proposed to achieve larger out-of-plane band gaps in two-dimensional silica/air photonic crystals with hexagonal symmetry.

Journal ArticleDOI
TL;DR: In this article, a method of obtaining optically sectioned fluorescence images in a widefield conventional microscope by interfering two beams on an object so as to illuminate it with a single spatial frequency fringe pattern is described.

Journal ArticleDOI
TL;DR: In this article, the beam propagation factor for coherent, higher-order, single mode beams can be calculated in a number of different ways, for example directly from information concerning the waist, or from far field information.

Journal ArticleDOI
TL;DR: In this article, a twisted-nematic liquid-crystal television in the pupil plane is investigated both experimentally and theoretically, and the precise evaluation of the modulation characteristics is first discussed.

Journal ArticleDOI
TL;DR: In this article, the drift of an optical vortex soliton created on a slowly diffracting, finite-extend background field is analyzed in the framework of the generalized nonlinear Schrodinger equation.

Journal ArticleDOI
TL;DR: In this paper, the problem of light scattering by a particle on or near a surface is treated using the extended boundary condition method's solution for scattering in a homogeneous medium and the integral representation of spherical vector wave functions over plane waves for the calculation of the reflection of the scattered field by the surface.

Journal ArticleDOI
TL;DR: In this paper, a long-range fiber optic pH sensor based on evanescent wave absorption is presented, which is prepared by immobilizing a mixture of three pH-sensitive dyes (cresol red, bromophenol blue and chlorophenol red) on the surface of the fiber core using sol-gel technology.

Journal ArticleDOI
TL;DR: In this paper, the role of optical effects in photovoltaic modules in outdoor operation was discussed and four independent models were used to describe these four losses: reflection of unpolarized light, spectrum, intensity of the light and temperature of the module.

Journal ArticleDOI
TL;DR: In this article, the diameter self-regulation of optical fiber tapers produced using a CO2 laser has been examined theoretically and modelled numerically, where the Mie theory of absorption derived from the Maxwell equations is used.

Journal ArticleDOI
TL;DR: An all-optical binary half-adder which simultaneously generates the bit-serial SUM and CARRY bits from two binary modulated input pulse trains and can implement the XOR function of the two input data streams is demonstrated.