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Theodor Hansch Ph.D.

Theodor Hansch Ph.D.

The Nobel Prize in Physics 2005
Co-nobelists: Roy J. Glauber, John L. Hall

Prize motivation: "for their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique."

Patents

Publication:1/12
Publication No:US7672342 B2
Title:Method and radiation source for generating pulsed coherent radiation
Publication Type:Grant
Publication Date:March 2, 2010
Filing Date:May 24, 2005
Inventors:Christoph Gohle, Theodor W. Hänsch, Ronald Holzwarth, Thomas Udem
Original Assignee:MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V.
Abstract:A method of generating pulsed coherent radiation, comprises the step of generating high harmonic pulses by an interaction of laser light pulses with a non-linear medium contained in a resonant cavity, wherein the non-linear medium is arranged in an environment of reduced pressure. Furthermore, a radiation source of generating pulsed coherent radiation is described, comprising a laser pulse source for generating laser light pulses, a resonant cavity including a non-linear medium for generating high harmonic pulses by an interaction of the laser light pulses with the non-linear medium, wherein the non-linear medium is arranged in an environment of reduced pressure.
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USPTO
Publication:2/12
Publication No:US7026594 B2
Title:Method and device for producing radio frequency waves
Publication Type:Grant
Publication Date:April 11, 2006
Filing Date:September 5, 2001
Inventors:Ronald Holzwarth, Thomas Udem, Theodor Hansch
Original Assignee:Max-Planck-Gesellschaft Zur Forderung Der Wissenschaft E.V.
Abstract:The invention relates to a method for producing radio frequency waves, whereby a pulse laser for producing light pulses having a predetermined spectrum of frequency modes and a predetermined recurrence frequency is operated. The light pulses of the pulse laser are detected by means of a detector device, and corresponding electrical output signals forming the radio frequency signals are produced. Said pulse laser is actuated in a stabilized manner by means of an optical reference signal in such a way that the recurrence frequency of the light pulse is fixed. The invention also relates to a radio frequency generator for implementing said method.
Representative Figure:
Family MembersDE10044405A1, DE10044405C2, US20040021056, WO2002021647A1
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USPTO
Publication:3/12
Publication No:US6785303 B1
Title:Generation of stabilized, ultra-short light pulses and the use thereof for synthesizing optical frequencies
Publication Type:Grant
Publication Date:August 31, 2004
Filing Date:March 10, 2000
Inventors:Ronald Holzwarth, Jörg Reichert, Thomas Udem, Theodor W. Hänsch
Original Assignee:Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften E. V.
Abstract:A process for operation of a laser device (1) is described, whereby circulating light pulses each comprising spectral components according to a plurality of longitudinal modes of a resonator configuration (3) are generated in the resonator configuration (3) and subjected to a compensation of group velocity dispersion, and a predetermined linear dispersion is introduced into the light path of the resonator configuration (3), so that at least one mode has a predetermined frequency and/or the mode distance between the modes has a predetermined value. Furthermore, regulations for stabilizing the laser device on the basis of this process and applications of the regulations for the generation for stabilized, ultra-short light pulses, generation of optical frequencies and in the frequency and/or time measuring technique as well as in the spectroscopy are described.
Representative Figure:
Family MembersDE19911103A1, DE19911103B4, EP1161782A1, EP1161782B1, WO2000055948A1
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USPTO
Publication:4/12
Publication No:US6724788 B1
Title:Method and device for generating radiation with stabilized frequency
Publication Type:Grant
Publication Date:April 20, 2004
Filing Date:September 6, 2000
Inventors:Ronald Holzwarth, Theodor W. Hänsch, Thomas Udem
Original Assignee:Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften E.V.
Abstract:A method for generating radiation with stabilized frequency, comprises the steps of providing laser light pulses with a repetition frequency fR, said pulses comprising a plurality of N frequency components fn with fn=n fR+f0, wherein f0 represents an offset frequency with n=1 , . . . , N, said frequency components forming a comb with first and second different frequency portions, and generating a primary light output with at least one output frequency component corresponding to the difference of frequencies of said first and second frequency portions.
Representative Figure:
Family MembersWO2002021649A2, WO2002021649A3
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USPTO, USPTO Assignment
Publication:5/12
Publication No:US6476383 B1
Title:Device and method for generating and manipulating coherent matter waves
Publication Type:Grant
Publication Date:November 5, 2002
Filing Date:August 31, 1999
Inventors:Tilman Esslinger, Theodor W. Hänsch, Immanuel Bloch
Original Assignee:Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften E.V.
Abstract:A device for generating and manpulating coherent matter waves contains a magnetic trap being adapted to form a magnetic trapping potential for gas atoms, said magnetic trap comprising a plurality of trap coils being connected with a current supply device and including two quadrupole coils and one Ioffe coil, wherein the trap coils are arranged in such a relative position that a common trap is formed, said common trap having a quadrupole trap shape with one trap minimum if the quadrupole coils are in an operation condition and the Ioffe coil is in a currentless condition or two trap minima or a Ioffe trap shape if all the quadrupole and Ioffe coils are in an operation condition and a shielding device protecting the magnetic trap against external magnetic fields. A method of continuous extracting matter waves from the trap is described.
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USPTO
Publication:6/12
Publication No:US6038055 A
Title:Method and device for generating phase-coherent light pulses
Publication Type:Grant
Publication Date:March 14, 2000
Filing Date:November 12, 1998
Inventors:Theodor Hansch, Tilman Heupel, Martin Weitz
Original Assignee:Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften E.V.
Abstract:For the generation of amplified, phase-coherent light pulses, a sequence of phase-coherent, equidistant input light pulses (21) is coupled into a resonator device (1) with at least two resonator mirrors (11, 14), forming a light path (10) with a predetermined resonator length, in such a way that the coupled in input light pulses in the resonator device are linearly superimposed in succession to form at least one circulating light pulse, whereby the circulating light pulse is coupled out of the resonator device as an output light pulse (31) as soon as the circulating light pulse has reached a preset minimum level of energy.
Representative Figure:
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USPTO
Publication:7/12
Publication No:US5079444 A
Title:Method and apparatus for producing a nonlinear interaction between two electromagnetic waves
Publication Type:Grant
Publication Date:January 7, 1992
Filing Date:February 27, 1990
Inventors:Reinald Kallenbach, Claus Zimmermann, Dieter Meschede, Theodor Hansch
Original Assignee:Max-Planck-Gesellschaft Zur Foerderung Der Wissenschaften E.V.
Abstract:Method and apparatus for producing a non-linear interaction between two electromagnetic waves, e.g. a laser beam and a microwave beam, in a non-linear optical medium, wherein one wave passes through a predetermined region of the medium in a zig-zag path, and the other traverses the predetermined region of the non-linear medium in two opposed directions in such a manner that an interaction-production phase-matching of the two waves is obtained not only in the departing but also in the approaching segments of the zig-zag path.
Representative Figure:
Family MembersDE3906068A1, DE3906068C2
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USPTO
Publication:8/12
Publication No:US4700150 A
Title:External laser frequency stabilizer
Publication Type:Grant
Publication Date:October 13, 1987
Filing Date:une 14, 1985
Inventors:John L. Hall, Theodor W. Hansch
Original Assignee:Stanford University
Abstract:An external laser frequency stabilizer combines an acousto-optic frequency shifter and a fast electro-optic phase modulator. A compensating electronic delay line in a crossover network provides a near-ideal transducer response while keeping the voltage across the electro-optic crystal away from the amplifier limits.
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USPTO, USPTO Assignment
Publication:9/12
Publication No:US4451923 A
Title:Method of an apparatus for measuring optical frequency variations
Publication Type:Grant
Publication Date:May 29, 1984
Filing Date:December 1, 1980
Inventors:Theodor W. Hansch, Bernard J. Couillaud
Original Assignee:Hansch Theodor W, Couillaud Bernard J
Abstract:Herein is disclosed a method of and apparatus for measuring optical frequency variations wherein linearly-polarized incident light generated by a tunable laser or the like is delivered to a passive resonant cavity incorporating a linear polarizer such as a Brewster plate so that the reflected light acquires a frequency-dependent elliptical polarization which can be detected by a simple polarization analyzer providing a signal correlated with the frequency variation of the laser. Such signal can be utilized as a feedback error signal to stabilize the laser frequency, or to adjust the cavity resonance. If the cavity is tunable, tuning thereof will in turn provide a precision method for tuning of the laser itself.
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USPTO
Publication:10/12
Publication No:US4191473 A
Title:Method of and apparatus for measuring the absolute wavelength of a source of unknown frequency radiation
Publication Type:Grant
Publication Date:March 4, 1980
Filing Date:January 9, 1978
Inventors:Theodor W. Hansch
Original Assignee:Theodor W. Hansch
Abstract:The invention constitutes a method of and apparatus for measuring the absolute wavelength of a source of unknown frequency radiation through directing radiant energy of known frequency against a diffraction grating of predetermined pattern so as to image a calibrated scale on a suitable screen or the like, and then directing the radiant energy from the unknown frequency source along the same path to the diffraction grating and onto the screen, where a visually available easy-to-read measurement of the wavelength appears.
Representative Figure:
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USPTO
Publication:11/12
Publication No:US3781700 A
Title:Optical element system and method for amplifying image forming light rays
Publication Type:Grant
Publication Date:December 25, 1973
Filing Date:February 11, 1971
Inventors:Theodor W. Hansch, Frank L. Varsanyi
Original Assignee:Univ Leland Stanford Junior
Abstract:An optical element system and method for amplifying light rays such that a typical plane in object space can be transferred and amplified as an image on a screen and image space using an organic dye media disposed in the path of the amplifying rays and excited by light pulses of having predetermined characteristics. Uses suggest themselves in widely varying field of infrared, ultraviolet and visible optical instruments and computers and other devices.
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USPTO
Publication:12/12
Publication No:US2011/0267625 A1
Title:Interferometer with frequency combs and synchronization scheme
Publication Type:Application
Publication Date:November 3, 2011
Filing Date:July 20, 2009
Inventors:Guy Guelachvili, Theodor W. Hänsch, Nathalie Picqué
Original Assignee:Centre National De La Recherche Scientifique-Cnrs
Abstract:An embodiment relates to an interferometer comprising: a first frequency comb; a second frequency comb adapted to interact with the first frequency comb in order to produce interferences; means for isolating the beating signal between a subset of frequency components among the frequency components of the two combs. This subset of frequency components may be preferably, but not necessarily, a single line of the first frequency comb and a single line of the second frequency comb; means for monitoring this beating signal and using it as a trigger or as a clock for the acquisition unit device recording the beating interference signal between the entire frequency components of the first and the second frequency combs.
Representative Figure:
Family MembersCA2731301A1, CA2731303A1, CN102159926A, CN102159926B, CN102246016A, EP2310816A1, EP2310817A2, US20110261363, WO2010010437A1, WO2010010437A8, WO2010010438A2, WO2010010438A3, WO2010010438A8, WO2010010444A1
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USPTO, USPTO Assignment

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Hansch
Photo Markus Possel, Wiki.

Name: Theodor W. Hänsch
Birth: 30 October 1941, Heidelberg, Germany
Institution: Max-Planck-Institut für Quantenoptik, Garching, Germany, Ludwig-Maximilians- Universität, Munich, Germany
Award: "for their contributions to the development of laser-based precision spectroscopy, including the optical frequency comb technique."
Subject: crystallography, electromagnetism
Portion of Cash: 1/3
Patents