Nigel John Cockroft

20020003928, Jan 10, 2002

Dec 15, 2000

09/738607

William Bischel - Menlo Park CA, US
David Deacon - Los Altos CA, US
Nigel Cockroft - Los Gatos CA, US
Markus Hehlen - Los Gatos CA, US
David Wagner - San Jose CA, US
Richard Tompane - Los Altos CA, US
Simon Field - Palo Alto CA, US

Gemfire Corporation

G02B006/26

385/039000, 385/027000, 385/047000

An integrated optical microstructure includes a substrate carrying an optical waveguide and supporting a medium disposed to receive optical energy from the waveguide. The medium includes an optical re-radiator such as a phosphor, which re-radiates optical energy in response to optical energy received from the waveguide. The structure further includes a reflector disposed to redirect some of the input optical energy emanating from the medium back into the medium, to achieve spatial confinement of the input light delivered by the input waveguide. The structure can thereby increase the efficiency of the light conversion processes of re-radiating materials. An aperture in the reflector permits optical energy emitted by the re-radiator to emerge from the structure and to propagate in a preferred direction, such as toward a viewer or sensor. The structure is useful for increasing the brightness of various kinds of small emissive elements which are excited by light delivered from an integrated optical waveguide, including pixels in an information display.

62087916, Mar 27, 2001

Apr 19, 1999

9/295244

William K. Bischel - Menlo Park CA
David A.G. Deacon - Los Altos CA
Nigel J. Cockroft - Los Gatos CA
Markus P. Hehlen - Los Gatos CA
David K. Wagner - San Jose CA
Richard B. Tompane - Los Altos CA
Simon J. Field - Palo Alto CA

Gemfire Corporation - Palo Alto CA

G02B6/10

385129

An integrated optical microstructure includes a substrate carrying an optical waveguide and supporting a medium disposed to receive optical energy from the waveguide. The medium includes an optical re-radiator such as a phosphor, which reradiates optical energy in response to optical energy received from the waveguide. The structure further includes a reflector disposed to redirect some of the input optical energy emanating from the medium back into the medium, to achieve spatial confinement of the input light delivered by the input waveguide. The structure can thereby increase the efficiency of the light conversion processes of re-radiating materials. An aperture in the reflector permits optical energy emitted by the re-radiator to emerge from the structure and to propagate in a preferred direction, such as toward a viewer or sensor. The structure is useful for increasing the brightness of various kinds of small emissive elements which are excited by light delivered from an integrated optical waveguide, including pixels in an information display.

58053298, Sep 8, 1998

Apr 10, 1996

8/630305

D. Wayne Cooke - Santa Fe NM
Bryan L. Bennett - Los Alamos NM
Nigel J. Cockroft - Santa Fe NM

The Regents of the University of California - Los Alamos NM

G02F 103
G02F 129
H01L 2302

359254

Methods are disclosed for minimizing laser induced damage to nonlinear crystals, such as KTP crystals, involving various means for electrically grounding the crystals in order to diffuse electrical discharges within the crystals caused by the incident laser beam. In certain embodiments, electrically conductive material is deposited onto or into surfaces of the nonlinear crystals and the electrically conductive surfaces are connected to an electrical ground. To minimize electrical discharges on crystal surfaces that are not covered by the grounded electrically conductive material, a vacuum may be created around the nonlinear crystal.

58808710, Mar 9, 1999

Jan 26, 1998

/013323

D. Wayne Cooke - Santa Fe NM
Bryan L. Bennett - Los Alamos NM
Nigel J. Cockroft - Santa Fe NM

The Regents of The University of California - Los Alamos NM

G02F 103

359254

Methods are disclosed for minimizing laser induced damage to nonlinear crystals, such as KTP crystals, involving various means for electrically grounding the crystals in order to diffuse electrical discharges within the crystals caused by the incident laser beam. In certain embodiments, electrically conductive material is deposited onto or into surfaces of the nonlinear crystals and the electrically conductive surfaces are connected to an electrical ground. To minimize electrical discharges on crystal surfaces that are not covered by the grounded electrically conductive material, a vacuum may be created around the nonlinear crystal.

52872173, Feb 15, 1994

Mar 30, 1993

8/039676

Nigel J. Cockroft - Los Alamos NM

The United States of America as represented by the United States
Department of Energy - Washington DC

H01S 317

359341

An optical amplifier operating at the 1. 31. mu. m wavelength for use in such applications as telecommunications, cable television, and computer systems. An optical fiber or other waveguide device is doped with both Tm. sup. 3+ and Pr. sup. 3+ ions. When pumped by a diode laser operating at a wavelength of 785 nm, energy is transferred from the Tm. sup. 3+ ions to the Pr. sup. 3+ ions, causing the Pr. sup. 3+ ions to amplify at a wavelength of 1. 31.