Results 271 to 280 of about 169,741 (316)

Transport of Light by Optical Fibers and Light Pipes

2014
The principle of propagation of light rays in a glass cylinder is the base of the technology of optical fibers. The fabrication of an optical fiber requires a coating (fiber cladding), whose refractive index is lower than that of the central part (fiber core).
Francini F, Fontani D, Sansoni P
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Carambola optics for recycling of light

Applied Optics, 2006
Recycling of light allows the luminance (radiance) emitted by a light source to be increased at the cost of reducing the total luminous flux (radiant power). Recycling of light means returning part of the emitted light to the source, where part of it will escape absorption.
Ralf, Leutz, Ling, Fu, Harald, Ries
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Light Scarring in an Optical Fiber

Physical Review Letters, 2001
We report the first experimental study of wave scarring in an optical fiber with a noncircular cross section. This optical multimode fiber serves as a powerful tool to image waves in a system where light rays exhibit a chaotic dynamics. Far-field intensity measurements are used to provide a better identification of scars in the Fourier domain.
Valérie, Doya, Olivier, Legrand, Fabrice, Mortessagne, Christian, Miniatura   +3 more
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Controlling light with light: nonlinear optics applications in optical communications

Summaries of Papers Presented at the Lasers and Electro-Optics. CLEO '02. Technical Diges, 2003
Summary form only given. Nonlinear optics concepts, which are important for optical communications, are reviewed. Purely optical nonlinear processes including semiconductor optical amplifiers, non-resonant third-order susceptibilities in glasses, organic materials and semiconductors, as well as cascaded second-order nonlinearities are presented and ...
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Optical binding in white light

Optics Letters, 2015
We experimentally demonstrate, for the first time, binding of aerosols of various sizes and shapes in white light. The optomechancial interaction between particles is long range and is in the underdamped regime. Incoherency allows mitigation of interference fringes to enable monotonically changing the distance between particles from 60 μm to contact ...
Shai, Maayani, Leopoldo L, Martin, Tal, Carmon   +2 more
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Slow Light in Optical Fibers

Frontiers in Optics 2007/Laser Science XXIII/Organic Materials and Devices for Displays and Energy Conversion, 2005
We describe our recent work on producing all-optical, tunable delays in optical waveguides, including schemes that can operate at high bandwidths suitable for telecommunications. Article not available.
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Stray Light in Optical Systems*

Journal of the Optical Society of America, 1947
An objective method has been developed for measuring the stray light in optical systems. Stray light reduces the contrast of image and falsely appears to augment the light transmission of optical system. The method utilizes a photoelectric apparatus to compare the contrast of an image formed by an optical system with the contrast of the object under ...
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Light utilization in optical correlators

Applied Optics, 1982
An analysis is made of the overall light efficiency in a coherent optical correlator. The results are applied to a matched filter and an inverse filter. Kogelnik's coupled wave theory is applied to analyze the diffraction efficiency of a filter recorded on a high-efficiency phase medium such as dichromated gelatin.
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The light microscope as an optical diffractometer

Journal of Cell Science, 1967
ABSTRACT The analysis of electron micrographs by optical diffraction was introduced recently by Klug & Berger (1964). Their experiments were conducted with a special diffractometer designed for use with diffracting masks up to several inches in diameter.
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Light Distribution in the Optical Image*

Journal of the Optical Society of America, 1947
A method is proposed for obtaining information about the light distribution in an optical image. The characteristic function of the optical system is approximated by a polynomial, containing terms up to the fifth or seventh order. The coefficients of this function having been found, a large number (about 100) of rays from an object point are chosen, so
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