Roger Dean Richards

US Patent:

6552842, Apr 22, 2003

Filed:

Apr 13, 2001

Appl. No.:

09/834422

Inventors:

John T. Simpson - Knoxville TN
Roger K. Richards - Knoxville TN
Donald P. Hutchinson - Knoxville TN
Marcus L. Simpson - Knoxville TN

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

G02B 2600

US Classification:

359318, 359291, 359247

Abstract:

A reflective coherent spatial light modulator (RCSLM) includes a subwavelength resonant grating structure (SWS), the SWS including at least one subwavelength resonant grating layer (SWL) have a plurality of areas defining a plurality of pixels. Each pixel represents an area capable of individual control of its reflective response. A structure for modulating the resonant reflective response of at least one pixel is provided. The structure for modulating can include at least one electro-optic layer in optical contact with the SWS. The RCSLM is scalable in both pixel size and wavelength. A method for forming a RCSLM includes the steps of selecting a waveguide material and forming a SWS in the waveguide material, the SWS formed from at least one SWL, the SWL having a plurality of areas defining a plurality of pixels.

US Patent:

6597487, Jul 22, 2003

Filed:

Nov 5, 2001

Appl. No.:

10/007180

Inventors:

Donald P. Hutchinson - Knoxville TN
Roger K. Richards - Knoxville TN

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

G02F 100

US Classification:

359237, 359334, 385122

Abstract:

An optical modulator includes a dielectric waveguide for receiving an optical beam and coupling energy of the optical beam into the waveguide. At least one Stark material is provided in the waveguide. A bias circuit generates a bias signal to produce an electrical field across the Stark material to shift at least one of the Stark absorption frequencies towards the frequency of the optical beam. A circuit for producing a time varying electric field across the Stark material modulates the optical beam. At least a portion of the bias field can be generated by an alternating bias signal, such as a square wave. A method of modulating optical signals includes the steps of providing a dielectric waveguide for receiving an optical beam and coupling energy of the optical beam into the waveguide, the waveguide having at least one Stark material disposed therein, and varying an electric field imposed across the Stark material.

US Patent:

6597721, Jul 22, 2003

Filed:

Sep 21, 2000

Appl. No.:

09/667181

Inventors:

Donald P. Hutchinson - Knoxville TN
Roger K. Richards - Knoxville TN

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

H01S 308

US Classification:

372 98, 372102, 372 20, 385129, 385130

Abstract:

A micro-laser is disclosed which includes a waveguide, a first and a second subwavelength resonant grating in the waveguide, and at least one photonic band gap resonant structure (PBG) in the waveguide and at least one amplifying medium in the waveguide. PBG features are positioned between the first and second subwavelength resonant gratings and allow introduction of amplifying mediums into the highly resonant guided micro-laser microcavity. The micro-laser may be positioned on a die of a bulk substrate material with one or more electronic and optical devices and may be communicably connected to the same. A method for fabricating a micro-laser is disclosed. A method for tuning the micro-laser is also disclosed. The micro-laser may be used as an optical regenerator, or a light source for data transfer or for optical computing.

US Patent:

6678054, Jan 13, 2004

Filed:

Aug 22, 2002

Appl. No.:

10/226164

Inventors:

William B. Dress - Camas WA
Roger A. Kisner - Knoxville TN
Roger K. Richards - Knoxville TN

Assignee:

UT-Battelle, L.L.C. - Oak Ridge TN

International Classification:

G01B 902

US Classification:

356450, 356484

Abstract:

Systems and methods are described for a quantum channel for the transmission of information. A method includes: down converting a beam of coherent energy to provide a beam of multi-color entangled photons; converging two spatially resolved portions of the beam of multi-color entangled photons into a converged multi-color entangled photon beam; changing a phase of at least a portion of the converged multi-color entangled photon beam to generate a first interferometric multi-color entangled photon beam; combining the first interferometric multi-color entangled photon beam with a second interferometric multi-color entangled photon beam within a single beam splitter; wherein combining includes erasing energy and momentum characteristics from both the first interferometric multi-color entangled photon beam and the second interferometric multi-color entangled photon beam; splitting the first interferometric multi-color entangled photon beam and the second interferometric multi-color entangled photon beam within the single beam splitter, wherein splitting yields a first output beam of multi-color entangled photons and a second output beam of multi-color entangled photons; and modulating the first output beam of multi-color entangled photons.

US Patent:

6744518, Jun 1, 2004

Filed:

Aug 24, 2001

Appl. No.:

09/939303

Inventors:

William B. Dress - Knoxville TN
Roger A. Kisner - Knoxville TN
Roger K. Richards - Knoxville TN

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

G01B 902

US Classification:

356450, 356484

Abstract:

53 Systems and methods are described for an interferometric source of multi-color, multi-beam entangled photons. An apparatus includes: a multi-refringent device optically coupled to a source of coherent energy, the multi-refringent device providing a beam of multi-color entangled photons; a condenser device optically coupled to the multi-refringent device, the condenser device i) including a mirror and a mixer and ii) converging two spatially resolved portions of the beam of multi-color entangled photons into a converged multi-color entangled photon beam; a tunable phase adjuster optically coupled to the condenser device, the tunable phase adjuster changing a phase of at least a portion of the converged multi-color entangled photon beam to generate a first interferometeric multi-color entangled photon beam; and a beam splitter optically coupled to the condenser device, the beam splitter combining the first interferometeric multi-color entangled photon beam with a second interferometric multi-color entangled photon beam.

US Patent:

6762844, Jul 13, 2004

Filed:

Aug 24, 2001

Appl. No.:

09/938843

Inventors:

William B. Dress - Knoxville TN
Roger A. Kisner - Knoxville TN
Roger K. Richards - Knoxville TN

Assignee:

UT-Battelle, LLC - Oak Ridge TN

International Classification:

G01B 902

US Classification:

356484

Abstract:

Systems and methods are described for an optical microscope using an interferometric source of multi-color, multi-beam entangled photons. A method includes: downconverting a beam of coherent energy to provide a beam of multi-color entangled photons; converging two spatially resolved portions of the beam of multi-color entangled photons into a converged multi-color entangled photon beam; transforming at least a portion of the converged multi-color entangled photon beam by interaction with a sample to generate an entangled photon specimen beam; and combining the entangled photon specimen beam with an entangled photon reference beam within a single beamsplitter. An apparatus includes: a multi-refringent device providing a beam of multi-color entangled photons; a condenser device optically coupled to the multi-refringent device, the condenser device converging two spatially resolved portions of the beam of multi-color entangled photons into a converged multi-color entangled photon beam; a beam probe director and specimen assembly optically coupled to the condenser device; and a beam splitter optically coupled to the beam probe director and specimen assembly, the beam splitter combining an entangled photon specimen beam from the beam probe director and specimen assembly with an entangled photon reference beam.