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Marc Jay Levenson

from Dallas, TX
Age ~73

Marc Levenson Phones & Addresses

  • 5457 Anita St, Dallas, TX 75206 (214) 824-7510
  • 6363 Christie Ave, Emeryville, CA 94608
  • Oakland, CA
  • Bensalem, PA
  • San Leandro, CA
  • 5530 Springhouse Dr, Pleasanton, CA 94588
  • Castro Valley, CA
  • Tiburon, CA
  • Desoto, TX
  • Trenton, NJ
  • Lewisville, TX
  • 2777 N Stemmons Fwy, Dallas, TX 75207

Professional Records

Medicine Doctors

Marc Levenson Photo 1

Marc Frederic Levenson

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Specialties:
Internal Medicine
Education:
Upstate Medical University Physical Medicine and Rehabilitation (1976)

Resumes

Resumes

Marc Levenson Photo 2

Marc Levenson

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Location:
United States

Business Records

Name / Title
Company / Classification
Phones & Addresses
Marc Levenson
Director
THE NEXT WAVE FOUNDATION
Civic/Social Association
3026 Ripplewood Dr, Garland, TX 75044

Publications

Us Patents

Generic Phase Shift Masks

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US Patent:
6479196, Nov 12, 2002
Filed:
Sep 6, 2001
Appl. No.:
09/947336
Inventors:
Marc David Levenson - Saratoga CA, 95070
International Classification:
G03F 900
US Classification:
430 5
Abstract:
The fine dark features in the images projected from strong phase-shifting masks used for microdevice lithography are accompanied by 180Â shifts in the optical phase, produced by a topography pattern distinct from the pattern of apertures that define the bright features. A generic topography pattern can be formed on the substrate underlying a continuous opaque mask layer which subsequently is patterned with a device-specific array of apertures. When the image projected from a phase-shifting mask comprised of the generic topography pattern and the device-specific aperture pattern is combined with a device-specific image projected from an associated conventional photomask, the photoresist pattern that results corresponds to desired device layers with the imaging advantages of strong phase-shifting masks, but without the need for specific patterning of the topography pattern.

Holey Fibers Filled With Raman Active Fluid

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US Patent:
6496634, Dec 17, 2002
Filed:
Jul 17, 2001
Appl. No.:
09/907241
Inventors:
Marc David Levenson - Saratoga CA, 95070
International Classification:
G02B 602
US Classification:
385125, 385 27, 3593411, 3593413, 359342, 359334
Abstract:
Hollow core or âholeyâ optical fibers are filled with a gas or liquid which exhibits high Raman gain. Such gases as hydrogen and hydrogen isotopes are preferred embodiment. When these fibers are pumped with a pump laser, signals at an appropriate frequency carried by the fiber may be amplified, attenuated, changed to a different frequency, or mixed with other signals.

Optical Transmitter Comprising A Stepwise Tunable Laser

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US Patent:
6611546, Aug 26, 2003
Filed:
Aug 15, 2001
Appl. No.:
09/930841
Inventors:
Arnaud Garnache - Montpillier cedex, FR
Daniele Romanini - Grenoble, FR
Frederic Stoeckel - Vaulnaveys le Haut, FR
Alexandre Katchanov - Sunnyvale CA
Guido Knippels - Sunnyvale CA
Barbara Paldus - Sunnyvale CA
Christopher Rella - Sunnyvale CA
Bruce Richman - Sunnyvale CA
Marc Levenson - Campbell CA
Assignee:
BlueLeaf, Inc. - Sunnyvale CA
International Classification:
H01S 308
US Classification:
372 92
Abstract:
An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which corresponding to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, that tuning arrangement comprises a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another. An optical modulator adds modulation to a beam emitting from the laser to provide the information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system. A calibration method based on detecting inter-mode optical transitions (mode hopping) is described.

Diffusion Barriers For Holey Fibers

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US Patent:
6661957, Dec 9, 2003
Filed:
Dec 12, 2002
Appl. No.:
10/317744
Inventors:
Marc David Levenson - Saratoga CA, 95070
Rodney Trevor Hodgson - Ossining NY, 10562
International Classification:
G02B 602
US Classification:
385125, 385 27, 359334, 3593411
Abstract:
A diffusion barrier attached to the cladding layer prevents significant diffusion of a Raman active gas out of the holes in a holey fiber or photonic band gap fiber.

Optical Transmitter Comprising A Stepwise Tunable Laser

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US Patent:
6711203, Mar 23, 2004
Filed:
Mar 22, 2002
Appl. No.:
10/104347
Inventors:
Arnaud Garnache - Montpillier cedex, FR
Daniele Romanini - Grenoble, FR
Frederic Stoeckel - Vaulnaveys le Haut, FR
Alexandre Katchanov - Sunnyvale CA
Guido Knippels - Sunnyvale CA
Barbara Paldus - Sunnyvale CA
Christopher Rella - Sunnyvale CA
Bruce Richman - Sunnyvale CA
Marc Levenson - Campbell CA
Robert Lodenkamper - Sunnyvale CA
Assignee:
BlueLeaf, Inc. - Sunnyvale CA
International Classification:
H01S 500
US Classification:
372 92, 372 45
Abstract:
An optical fiber transmitter for emitting an information-carrying laser beam comprises an optically or electrically pumped single mode MQW (multi-quantum well) semiconductor amplifying mirror as a gain medium and a separate external reflector to form a cavity. The external cavity length defines a comb of optical modes, all or a subset of which correspond to channel wavelengths of an optical telecommunications system having plural optical channels. The semiconductor gain element has a homogeneously broadened gain region; a tuning arrangement tunes the laser from mode to mode across the gain region, thereby selecting each one of the plural optical channels. When the maximum gain bandwidth is less than mode-to-mode spacing defined by the cavity, the tuning arrangement includes a means of altering the temperature of the amplifying mirror, thereby translating the frequency of the gain peak from one mode to another. An optical modulator adds modulation to provide an information-carrying laser beam, and a coupler couples the information-carrying laser beam into an optical fiber of the optical telecommunications system. A calibration method based on detecting inter-mode optical transitions (mode hopping) is described.

Modified Tunable Acousto-Optic Filter

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US Patent:
6741381, May 25, 2004
Filed:
Nov 8, 2002
Appl. No.:
10/291073
Inventors:
Marc Levenson - Campbell CA
Robert Lodenkemper - Sunnyvale CA
Assignee:
Picarro, Inc. - Sunnyvale CA
International Classification:
G02F 111
US Classification:
359285, 359286, 359287
Abstract:
Acousto-optical filter systems for filtering a light beam by generating undiffracted and diffracted light beams within a birefringent crystal and by suppressing the diffracted beam within or at a face of the crystal. Where the two beams are noncollinear, an aperture provides diffracted beam suppression. Where the two beams have different polarization directions, the diffracted beam is suppressed by a polarization analyzer, internal reflection of each beam at a Brewster angle at the surface, total internal reflection of the diffracted beam at the surface, or a suitably oriented multilayer thin film at the surface. Variation of the acoustic frequency provides tunability of the filter.

Vortex Phase Shift Mask For Optical Lithography

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US Patent:
6811933, Nov 2, 2004
Filed:
Jul 1, 2002
Appl. No.:
10/186587
Inventors:
Marc David Levenson - Saratoga CA, 95070
International Classification:
G03F 900
US Classification:
430 5, 430394
Abstract:
A photolithography method and apparatus for producing minima of light intensity corresponding to a point in a phase shift mask is described. The phase shift in the light produced by the mask varies in a spiral fashion around the point so that the phase shift measured along lines drawn across the surface of the mask which pass through the point have a 180Â jump at the point, and lines passing around the point have no jumps between 130Â and 230Â, and most preferably no jumps between 100Â and 260Â.

Detection Of Adsorbates On Interior Surfaces Of Holey Fibers

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US Patent:
6845203, Jan 18, 2005
Filed:
Dec 8, 2003
Appl. No.:
10/730721
Inventors:
Marc David Levenson - Saratoga CA, US
International Classification:
G02B 602
US Classification:
385125, 385 12, 385 30, 422 8211
Abstract:
The interior surfaces of the holes in holey optical fibers has adsorbed optically material which may be detected by propagating laser light down the axis of the fiber and detecting Raman, Infrared, or visible fluorescence or absorption.

Isbn (Books And Publications)

Medicinal Herbal Therapy: A Pharmacist's Viewpoint

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Author

Marc Levenson

ISBN #

0756786088

Introduction to Nonlinear Laser Spectroscopy

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Author

Marc D. Levenson

ISBN #

0124447201

Introduction to Nonlinear Laser Spectroscopy

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Author

Marc D. Levenson

ISBN #

0124447228

Lasers, Spectroscopy, and New Ideas

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Author

Marc D. Levenson

ISBN #

0387182969

Marc Jay Levenson from Dallas, TX, age ~73 Get Report