Austin Neurosurgical Institute 2200 Park Bnd Dr STE 202, Austin, TX 78758 5128360900 (phone), 5128360902 (fax)
Education:
Medical School University of Texas Southwestern Medical Center at Dallas Graduated: 1997
Procedures:
Carpal Tunnel Decompression Spinal Cord Surgery Spinal Fusion Spinal Surgery Craniotomy Lumbar Puncture
Conditions:
Intervertebral Disc Degeneration
Languages:
English
Description:
Dr. Loftus graduated from the University of Texas Southwestern Medical Center at Dallas in 1997. He works in Austin, TX and specializes in Surgery , Neurological. Dr. Loftus is affiliated with Hospital At Westlake Medical Center, Northwest Hills Surgical Hospital and St Davids North Austin Medical Center.
Us Patents
Apparatus And Method For Spectral-Beam Combining Of High-Power Fiber Lasers
Andrew J. W. Brown - Brier WA, US Eric C. Honea - Seattle WA, US Thomas H. Loftus - Seattle WA, US Roy D. Mead - Edmonds WA, US Charles E. Hamilton - Kenmore WA, US Anping Liu - Big Flats NY, US Charles A. Lemaire - Apple Valley MN, US
Assignee:
Aculight Corporation - Bothell WA
International Classification:
H04J 14/02 G02B 27/64
US Classification:
359556, 398 87
Abstract:
Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.
Method And Apparatus For Spectral-Beam Combining Of High-Power Fiber Lasers
Andrew J. W. Brown - Brier WA, US Eric C. Honea - Seattle WA, US Thomas H. Loftus - Seattle WA, US Roy D. Mead - Edmonds WA, US Charles E. Hamilton - Kenmore WA, US Anping Liu - Big Flats NY, US Charles A. Lemaire - Apple Valley MN, US
Assignee:
Aculight Corporation - Bothell WA
International Classification:
G02B 27/64
US Classification:
359556
Abstract:
Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.
Method And Apparatus For Spectral-Beam Combining Of Fiber-Amplified Laser Beams Using High-Efficiency Dielectric Diffractive Gratings
Andrew J. W. Brown - Brier WA, US Eric C. Honea - Seattle WA, US Thomas H. Loftus - Seattle WA, US Roy D. Mead - Edmonds WA, US Charles E. Hamilton - Kenmore WA, US Anping Liu - Big Flats NY, US Charles A. Lemaire - Apple Valley MN, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
H04B 10/17 H01S 3/00
US Classification:
3593411, 372 6, 372102, 372108
Abstract:
Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate parallel input beams each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, a single diffraction grating is used to combine a plurality of different wavelengths, wherein the input laser beams are obtained from very narrow linewidth sources to reduce chromatic dispersion. In some embodiments, diagnostics and adjustments of wavelengths and/or positions and angles are made dynamically in real time to maintain the combination of the plurality input beams into a single high-quality output beam.
Method And Apparatus For Spectral-Beam Combining Of Fanned-In Laser Beams With Chromatic-Dispersion Compensation Using A Plurality Of Diffractive Gratings
Steven C. Tidwell - Kirkland WA, US Thomas H. Loftus - Seattle WA, US Charles A. Lemaire - Apple Valley MN, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
H01S 4/00 H04B 10/17
US Classification:
359349
Abstract:
Apparatus and method for spectral-beam combining of light from a plurality of high-power lasers (e. g. , fiber MOPA lasers) that, in some embodiments, use substantially identical diffraction gratings in a 1-D non-parallel, mutually compensating configuration to combine non-parallel converging input beams in one plane each having a slightly different successively higher wavelength into a single output beam of high quality. In other embodiments, an output grating and one or more input gratings in a 1-D parallel, mutually compensating configuration combine non-parallel input beams in one plane into a single output beam of high quality. In other embodiments, a 2-D plurality of input gratings in a non-parallel configuration combine a plurality of non-parallel input beams not in one plane each having a slightly different successively higher wavelength into a set of converging beams in one plane directed towards an output grating that compensates for chromatic dispersions introduced by the input gratings.
Anping Liu - Corning NY, US Eric C. Honea - Seattle WA, US Charles A. Lemaire - Apple Valley MN, US Roy D. Mead - Edmonds WA, US Christopher D. Brooks - Kenmore WA, US Andrew J. W. Brown - Bellingham WA, US Charles E. Hamilton - Kenmore WA, US Thomas H. Loftus - Seattle WA, US Fabio Di Teodoro - Lawndale CA, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
G02B 6/34 G02B 6/26 G02B 4/42
US Classification:
385 37, 385 39, 385 47
Abstract:
A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i. e. , polygamy), and of mode hopping (i. e. , promiscuity) due to limited control of energy levels and fluctuations. The problems of multiple-modes and mode hopping result from the use of large-diameter waveguides, and are addressed by the invention. This is especially true in lasers using large amounts of energy (i. e. , lasers in the one-megawatt or more range). By using multiple small waveguides in parallel, large amounts of energy can be passed through a laser, but with better control such that the aforementioned problems can be reduced. An additional advantage is that the polarization of the light can be maintained better than by using a single fiber core.
Spectral-Beam Combining For High-Power Fiber-Ring-Laser Systems
Eric C. Honea - Seattle WA, US Thomas H. Loftus - Seattle WA, US Charles A. Lemaire - Apple Valley MN, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
G02B 27/64
US Classification:
359556
Abstract:
A ring-laser system that includes a plurality of ring-laser gain elements and a spectral-beam-combining output stage configured to combine a plurality of beams coming from the gain elements into an output beam and that includes chromatic-dispersion compensation. In some embodiments, the output stage includes a plurality of highly reflective dielectric-coated focussing elements. In some embodiments, the output stage includes a plurality of high-efficiency dielectric-coated grating elements. In some embodiments, the output stage includes a mostly reflective but partially transmissive output mirror and a highly reflective beam-reversing mirror configured to reflect a majority of a backward-traveling signal beam such that it becomes forward traveling. In some embodiments, each gain element further includes a photonic-crystal-rod power amplifier. Some embodiments have an amplitude modulator configured to pulse the plurality of beams, and a timing controller configured to synchronize the pulses of the plurality of beams.
The Lord's Place West Palm Beach, FL Jul 2012 to Aug 2014 Job CoachLiteracy AmeriCorps Palm Beach County Boynton Beach, FL Aug 2011 to Jul 2012 Adult Literacy TutorAmeriCorps VISTA Chicago, IL Nov 2009 to Nov 2010 Community AdvocateMercy Housing Lakefront Chicago, IL Sep 2008 to Sep 2009 Community Advocate
Education:
St. John's College Santa Fe, NM Aug 2008 Master of ArtsUniversity of San Diego San Diego, CA Aug 2007 Bachelor of Arts in Philosophy
GoMotion Inc San Diego, CA Sep 2010 to Jul 2012 Director of OperationsMoneyNest Holdings Inc
Mar 2006 to Apr 2010 Account ExecutiveFinancial Times / Interactive Data Corporation New York, NY Jan 2004 to Jan 2006 Municipal Bond AnalystTD Waterhouse Investor Services New York, NY Feb 2000 to Oct 2003 Relationship Manager / Institutional Services
Education:
Richard Stockton College of New Jersey 1995 B.A. in Business Administration