Eric Brent Szarmes

US Patent:

6636534, Oct 21, 2003

Filed:

Feb 22, 2002

Appl. No.:

10/081577

Inventors:

John M. J. Madey - Honolulu HI
Eric Brent Szarmes - Honolulu HI
Orion Crissafulli - Kailua HI

Assignee:

University of Hawaii - Honolulu HI

International Classification:

H01S 300

US Classification:

372 2

Abstract:

A free-electron laser (FEL), which in a preferred embodiment comprises a relativistic electron beam generator; an optical cavity capable of storing a co-propagating optical beam; an interaction region; a phase displacement device disposed in the interaction region; and an output coupler interposed in the optical cavity through which a predetermined portion of the co-propagating optical beam exits as a coherent output optical beam. In certain embodiments, an optical beam spectral filter may be interposed in the optical cavity. FEL components and methods of use are also disclosed. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope of meaning of the claims.

US Patent:

6643314, Nov 4, 2003

Filed:

Feb 22, 2002

Appl. No.:

10/081416

Inventors:

Eric Brent Szarmes - Honolulu HI

Assignee:

University of Hawaii - Honolulu HI

International Classification:

H01S 3081

US Classification:

372 92, 372 2, 372 98, 372105, 372 20, 372 18

Abstract:

A compound intercavity interferometer for a free-electron laser (FEL) comprising at least two beam splitters positioned at a predetermined angles with respect to optical pathways. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope of meaning of the claims.

US Patent:

7382861, Jun 3, 2008

Filed:

May 31, 2006

Appl. No.:

11/421351

Inventors:

John M. J. Madey - Honolulu HI, US
Eric B. Szarmes - Honolulu HI, US

International Classification:

H05G 2/00

US Classification:

378119

Abstract:

A method of generating energetic electromagnetic radiation comprises, during each of a plurality of separated radiation intervals, injecting laser radiation of a given wavelength into an optical cavity that is characterized by a round-trip transit time (RTTT) for radiation of that given wavelength. At least some radiation intervals are defined by one or more optical macropulses, at least one optical macropulse gives rise to an associated circulating optical micropulse that is coherently reinforced by subsequent optical micropulses in the optical macropulse and the electric field amplitude of the circulating optical micropulse at any given position in the cavity reaches a maximum value during the radiation interval.

US Patent:

7433044, Oct 7, 2008

Filed:

Jun 3, 2005

Appl. No.:

11/145164

Inventors:

Eric Szarmes - Honolulu HI, US
Huan Ma - Honolulu HI, US

Assignee:

University of Hawaii - Honolulu HI

International Classification:

G01B 9/02
G01J 3/45

US Classification:

356451

Abstract:

A Fourier transform spectrometer based on a modified Sagnac interferometer is described. The instrument uses one or more gratings as dispersive elements to greatly improve the spectral resolution, and in-line optics to match the beam size in the interferometer to optimize the efficiency. The resolution can approach about 0. 6 GHz at about 632. 8 nm (λ/Δλ=8. 4×105). A CCD or photodiode array is used as the detector and the fast Fourier transform of the fringe pattern is performed by a computer. Some embodiments employ no mechanically moving parts; therefore, they are compact and easy to align. Practical applications include remote sensing, process monitoring, and basic research. The fast response time of the detector also allows real time spectral analysis.

US Patent:

7532649, May 12, 2009

Filed:

Jun 2, 2005

Appl. No.:

11/143106

Inventors:

Eric Szarmes - Honolulu HI, US

Assignee:

University of Hawaii - Honolulu HI

International Classification:

H01S 3/10
H01S 3/13
H01S 3/08

US Classification:

372 9, 372 29022, 372 92

Abstract:

An apparatus is described that includes an optical storage cavity comprising a planar mirror and a spherically curved mirror that form an optical path therebetween. A pump laser introduces optical pulses into the cavity. A folding mirror is disposed in the optical path between the planar mirror and the spherically curved mirror such that a beam waist is formed between the folding mirror and the second spherically curved mirror. The optical pulses preferably interact with selected particles disposed in the optical path at the waist. The apparatus further comprises a first transducer which adjusts the distance between the spherical mirror and the folding mirror to change a characteristic of the beam waist. A second transducer adjusts the distance between the planar mirror and the spherical mirror to change the optical path length of the cavity. The optical cavity is arranged such that the change in path length due to the second transducer does not significantly affect the characteristic of the beam waist.

US Patent:

7733492, Jun 8, 2010

Filed:

May 10, 2006

Appl. No.:

11/431936

Inventors:

Eric Szarmes - Honolulu HI, US
Huan Ma - Honolulu HI, US

Assignee:

University of Hawaii - Honolulu HI

International Classification:

G01B 9/02
G01J 3/45

US Classification:

356451, 356483

Abstract:

Systems and methods are disclosed for a modified Sagnac interferometer having a plurality of gratings that can be reflective or transmissive. The gratings allow measurement of wavelength spectra in counter-circulating beams of the interferometer. In one embodiment, diffraction geometries at each pair of neighboring gratings are configured so that diffractive and angular contributions reinforce each other at the second of the pair of gratings. In one embodiment, diffraction geometries at the gratings are configured so that the exiting beams of the interferometer satisfy the crossing condition wherein the exiting beams are on the opposite sides of a reference beam axis for a design wavelength input beam. Also disclosed are techniques for restoring the reinforcement and/or crossing conditions when these conditions are not otherwise met.

US Patent:

20040146073, Jul 29, 2004

Filed:

Nov 3, 2003

Appl. No.:

10/699812

Inventors:

Eric Szarmes - Honolulu HI, US

International Classification:

H01S003/00

US Classification:

372/002000

Abstract:

A compound intracavity interferometer for a free-electron laser (FEL) comprising at least two beam splitters positioned at a predetermined angles with respect to optical pathways. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope of meaning of the claims.

US Patent:

20100289408, Nov 18, 2010

Filed:

May 10, 2010

Appl. No.:

12/777201

Inventors:

John Madey - Honolulu HI, US
Eric Szarmes - Honolulu HI, US
Pui Kwong Lam - Honolulu HI, US
Shahab Etemad - Warren NJ, US
Nicholas Peters - Laurel MD, US
Zhensheng Jia - Morganville NJ, US

International Classification:

H01J 25/50
G21G 4/00

US Classification:

315 3951, 2504931

Abstract:

A photon source capable of emitting, for example, a single photon or a single pair of photons on demand. The photon source may include an excitation region where a single instance of a quantum system is excited using excitation energy. A Stimulated Raman Adiabatic Passage (STIRAP) technique can be used for exciting the quantum system to a desired energy level. The photon source may include a photon emission region physically displaced from the excitation region. A transport device can be used for controllably moving an excited quantum system from the excitation region to the photon emission region. The photon emission region may include a resonant cavity tuned to the de-excitation frequency of the quantum system for inducing de-excitation of the quantum system and emission of a photon. The photon emission resonant cavity may be switchably coupled to an output port by a tunable resonant cavity coupling device.