Dominique C Fourguette

US Patent:

6717172, Apr 6, 2004

Filed:

Dec 18, 2001

Appl. No.:

10/025218

Inventors:

Morteza Gharib - San Marino CA
Daniel W. Wilson - Glendale CA
Siamak Forouhar - Carlsbad CA
Richard E. Muller - Altadena CA
Dominique Fourguette - Pasadena CA
Darius Modarress - Pasadena CA
Frederic Taugwalder - Pasadena CA

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

G01N 2149

US Classification:

250574, 356 28, 356441, 73861

Abstract:

A diffractive optic sheer stress sensor operates by forming diverging fringes over a linear area of measurement. A diode laser focuses light onto a diffractive lens which focuses the light to respective slits. The slits form diverging fringes, and scattered light from the fringes is collected by a window and focused by another diffractive lens to a receiver.

US Patent:

6956230, Oct 18, 2005

Filed:

Sep 15, 2000

Appl. No.:

09/838344

Inventors:

Morteza Gharib - San Marino CA, US
Dominique Fourguette - Los Angeles CA, US
Darius Modarress - Los Angeles CA, US
Frederic Taugwalder - Altadena CA, US
Siamak Forouhar - Pasadena CA, US

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

G01N021/49

US Classification:

250574, 356336, 356441, 738655, 73705

Abstract:

Integrated sensors are described using lasers on substrates. In one embodiment, a first sensor forms a laser beam and uses a quartz substrate to sense particle motion by interference of the particles with a diffraction beam caused by a laser beam. A second sensor uses gradings to produce an interference. In another embodiment, an integrated sensor includes a laser element, producing a diverging beam, and a single substrate which includes a first diffractive optical element placed to receive the diverging beam and produce a fringe based thereon, a scattering element which scatters said fringe beam based on particles being detected, and a second diffractive element receiving scattered light.

US Patent:

20020113963, Aug 22, 2002

Filed:

Dec 4, 2001

Appl. No.:

10/006932

Inventors:

Morteza Gharib - San Marino CA, US
Dominique Fourguette - Los Angeles CA, US
Frederic Taugwalder - Altadena CA, US
Daniel Wilson - Montrose CA, US
Darius Modarress - Los Angeles CA, US

International Classification:

G01N015/02

US Classification:

356/336000

Abstract:

An optical particle detection system produces an optical beam which is scattered by particles in a probe volume area. The particles may scatter the beam to the detector. The optical beam is a hollow shaped beam which may be circular/doughnut shaped, or made be of any other hollow shape. The particle passes across the beam, and those particles which pass through the center of the beam are detected as being desired particles to detect. This system may be used to detect particle concentration, and size. In addition, by producing an asymmetric beam, particle direction can also be detected.

US Patent:

20120056072, Mar 8, 2012

Filed:

Sep 6, 2011

Appl. No.:

13/226466

Inventors:

Dominique Claire FOURGUETTE - Los Angeles CA, US
M. Volkan OTUGEN - Dallas TX, US
Liane Marie LAROCQUE - Los Angeles CA, US
Greg Alan RITTER - Hamburg MI, US
Jason Jeffrey MEEUSEN - Howell MI, US
Tindaro IOPPOLO - Dallas TX, US

International Classification:

G01J 1/42
G02B 6/00

US Classification:

2502011, 385 13, 25022714

Abstract:

A whispering-gallery-mode-based seismometer provides for receiving laser light into an optical fiber, operatively coupling the laser light from the optical fiber into a whispering-gallery-mode-based optical resonator, operatively coupling a spring of a spring-mass assembly to a housing structure; and locating the whispering-gallery-mode-based optical resonator between the spring-mass assembly and the housing structure so as to provide for compressing the whispering-gallery-mode-based optical resonator between the spring-mass assembly and the housing structure responsive to a dynamic compression force from the spring-mass assembly responsive to a motion of the housing structure relative to an inertial frame of reference.

US Patent:

20120056363, Mar 8, 2012

Filed:

Sep 5, 2011

Appl. No.:

13/225537

Inventors:

Greg Alan RITTER - Hamburg MI, US
Dominique Claire FOURGUETTE - Los Angeles CA, US
Liane Marie LAROCQUE - Los Angeles CA, US

International Classification:

F16F 1/18

US Classification:

267158

Abstract:

A leaf spring formed of sheet elastic material comprises a plurality of at least three elastic structures connecting a central and peripheral portions of the leaf spring to one another, wherein each elastic structure is substantially identically shaped, and is azimuthally equiangularly spaced and equiradially located around and relative to a center of the central portion of the leaf spring. Each elastic structure incorporates at least one pair of serpentine profiles, wherein each serpentine profile of the pair defines a corresponding edge of a common portion of the sheet elastic material.

US Patent:

20210255213, Aug 19, 2021

Filed:

Feb 11, 2021

Appl. No.:

17/174175

Inventors:

- Dallas TX, US
- Ann Arbor MI, US
Dominique Fourguette - Stevenson Ranch CA, US

International Classification:

G01P 15/093
G02B 6/43
G01P 13/00
G01V 1/18

Abstract:

An optical motion sensor includes a substrate, a whispering-gallery-mode-based optical resonator disposed on the substrate, a mass-spring-damper system disposed on the substrate proximate to a first side of the whispering-gallery-mode-based optical resonator, and a waveguide or optical fiber. The whispering-gallery-mode-based optical resonator has a substantially circular cross-section. A gap separates an end of the mass-spring-damper system from the whispering-gallery-mode-based optical resonator. The waveguide or optical fiber abuts a second side of the whispering-gallery-mode-based optical resonator that is substantially opposite to the first side.

US Patent:

20180224299, Aug 9, 2018

Filed:

Aug 3, 2017

Appl. No.:

15/668563

Inventors:

- Morris Plains NJ, US
Grant Lodden - Minnetrista MN, US
Dominique Fourguette - Stevenson Ranch CA, US
Xiao Zhu Fan - Plymouth MN, US
David Johnson - Canton MI, US
Jane Pavlich - Ann Arbor MI, US
David Zuk - Dexter MI, US

International Classification:

G01C 23/00
G01P 5/26
G01K 11/00
G01L 11/02

Abstract:

A system for obtaining air data for a vehicle comprises a laser device that emits laser light pulses, and transmit optics that transmits the light pulses into an external air volume adjacent to the vehicle. The system also includes receive optics that collects scattered portions of the light pulses from the external air volume, and a whispering gallery mode (WGM) frequency discriminator that receives the scattered portions of the light pulses from the receive optics. The WGM frequency discriminator includes at least one WGM resonator that outputs a selected portion of the light pulses at one or more optical signal frequencies via tuning the WGM resonator other than by an electro-optic effect. An optical detector samples the selected portion of the light pulses from the WGM frequency discriminator, and converts the sampled light pulses to scalar values. A processing unit receives and records the scalar values from the optical detector.