TITLE

Suppression of sidelobes in the far-field radiation patterns of optical waveguide arrays

AUTHOR(S)
Abeles, J. H.; Deri, R. J.
PUB. DATE
October 1988
SOURCE
Applied Physics Letters;10/10/1988, Vol. 53 Issue 15, p1375
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Arrays of coherent optical emitters are attractive for high-speed, wide-angle optical beamsteering or deflection, but uniform arrays radiate undesirable sidelobes. It is shown that dramatic suppression of sidelobes can be accomplished by configuring emitters in a nonuniform pattern. A nearly optimum radiation pattern for scanning results from gradually doubling the interelement spacing across a one-dimensional array. As an example, a 100-element waveguide array of minimum interelement spacing 5 μm radiates a 0.08° main lobe (full width at half-maximum) with a 30× suppression of sidelobe intensity.
ACCESSION #
9828411

 

Related Articles

  • Three-dimensional quasistationary approach to Cherenkov-type optical harmonic generation using a unidirectional-radiation model. Hayata, K.; Matsumura, H.; Koshiba, M. // Journal of Applied Physics;11/15/1992, Vol. 72 Issue 10, p4514 

    Presents information on a study which implemented a three-dimensional calculation of Cherenkov-type frequency doubling in an optical channel waveguide by slicing the lateral profile of the interacting fields into a number of small segments. Background of the study; Methodology of the study;...

  • The Possibility for a Significant Decrease in the Zero Drift of Fiber Ring Interferometers with a Circuit Formed by a Highly Anisotropic Optical Waveguide and a Broadband Radiation Source. Malykin, G. B. // Optics & Spectroscopy;Oct2001, Vol. 91 Issue 4, p638 

    It is shown that the zero drift of interference of counterpropagating waves at the output from a fiber ring interferometer can be completely eliminated in the first order of magnitude and significantly decreased in the second order of magnitude if a sufficiently broadband source of...

  • Planar Dielectric Layered Media: Guided Localized Electromagnetic Structures and Optical Switches. Sukov, Alexander I.; Tregubov, Konstantin V.; Lima, Pedro M. // AIP Conference Proceedings;9/6/2007, Vol. 936 Issue 1, p539 

    In this work, we are concerned about the minimization of the length of directed conection between two planar dielectrical waveguides at optical frequencies. It is shown that, by an optimal choice of the waveguide parameters, the connection length can be reduced to less than 100 μ, while the...

  • An optical waveguide with a nonlinear optical susceptibility inversion structure in the thickness direction. Asai, Nobutoshi; Tamada, Hitoshi; Fujiwara, Ichiro; Seto, Jun’etsu // Journal of Applied Physics;11/15/1992, Vol. 72 Issue 10, p4521 

    Presents information on a study which proposed a nonlinear optical susceptibility inversion structure in the thickness direction for an optical waveguiding layer to achieve efficient second-harmonic generation in the form of Cerenkov radiation. Background of the study; Methodology of the study;...

  • Characteristic features of low-energy radiation detection by the scintillation method. Sarychev, D. A.; Stashenko, V. V. // Journal of Applied Spectroscopy;Sep2009, Vol. 76 Issue 5, p756 

    We present experimental studies of the effect of zonal nonuniformity of a photocathode and electron collection in the entrance chamber of two different types of photoelectron multipliers (FÉU-85 and Hamamatsu R6094) on the energy resolution and efficiency of detection of low-energy ionizing...

  • BEND LOSS OF STEP-INDEX SLAB WAVEGUIDES WITH A TRENCH SECTION. Yamauchi, Junji; Ikegaya, Morihiko; Nakano, Hisamatsu // Microwave & Optical Technology Letters;6/5/92, Vol. 5 Issue 6, p251 

    An optical waveguide bend with a trench section whose refractive index is smaller than that in the cladding is investigated to reduce bend loss. The appropriate location and width of the trench are determined using the beam propagation method. It is found that the attenuation constant shows a...

  • DENSITY VARIATIONS IN MILKY WAY GAS. Nasoudi-Shoar, S.; Richter, P.; de Boer, K. S. // EAS Publications Series;2012, Vol. 56, p77 

    Recent studies at optical and radio wavelengths have shown that interstellar clouds have density structures on scales smaller than 1 pc. These have been identified in form of temporal variations or differences in column density within small angular separations. Despite the number of detections...

  • Surface-emitting fibre lasers: Perfect ring-like beam. Fotiadi, Andrei A.; Mégret, Patrice // Nature Photonics;Apr2012, Vol. 6 Issue 4, p217 

    The article reports on a proposal by O. Shapira and colleagues of a new fibre laser in which the fibre emits radiation radially from its circumferential surface. It states that though emissions from fibre lasers need to be cylindrically asymmetric, surface-emitting fibre lasers generate...

  • Grooved aperture efficiently couples terahertz waves into wire waveguide. Wallace, John // Laser Focus World;Sep2007, Vol. 43 Issue 9, p45 

    The article discusses the technique which converts metal wires as waveguides for terahertz radiation in Salt Lake City, Utah. It notes that the technique can be made possible if sharply pointed, the end of such waveguide can focus the radiation to a subwavelength-size spot. A research at the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics