Caroline Denise Gee

age ~61

from Los Angeles, CA

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Process For Etching Lithium Niobate Based Devices Without Damaging Optical Waveguides
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US Patent:

47509791, Jun 14, 1988
Filed:

Nov 26, 1984
Appl. No.:

6/674811
Inventors:

Caroline M. Gee - Woodland Hills CA
Hugh L. Garvin - Malibu CA
Assignee:

Hughes Aircraft Company - Los Angeles CA
International Classification:

C23C 1434
US Classification:

2041923
Abstract:

The present invention provides a method of preparing the surface of a lithium niobate substrate (10) having titanium optical waveguides (12) for a subsequent deposition of a coating material such as electrodes. This cleaning or etching step prior to the deposit of desired coating materials is accomplished without deterioration of the transmission capacities of the optical waveguides (12). The substrate cleaning step of the present invention comprises the introduction of a predetermined amount of oxygen (16) at a controlled rate to provide a predetermined atmospheric environment surrounding the lithium niobate substrate (10). The subsequent etching of the substrate surface to a predetermined depth, for example, by argon ion bombardment, provides minimal damage to the optical waveguides while still producing an excellently cleaned surface preparatory for receiving subsequent layer depositions such as the electrodes.

Microwave Frequency Range Electro-Optic Modulator With Efficient Input Coupling And Smooth Wideband Frequency Response
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US Patent:

52086976, May 4, 1993
Filed:

Mar 30, 1990
Appl. No.:

7/502377
Inventors:

James H. Schaffner - Chatsworth CA
Robert L. Joyce - Newbury Park CA
Caroline M. Gee - Los Angeles CA
James M. Schellenberg - Huntington Beach CA
Assignee:

Hughes Aircraft Company - Los Angeles CA
International Classification:

G02B 5174
G02B 610
G02B 514
US Classification:

359254
Abstract:

A travelling-wave Mach-Zehnder electro-optic modulator (10) for operation at microwave electrical input signal frequencies has an electrical modulation electrode structure (26,34) which constitutes a coplanar waveguide (24). An electrical input signal connector (80) is coupled to a microstrip line (38) having an output impedance which is significantly different from the input impedance of the waveguide (24). A Chebyshev impedance matching transformer (50) couples the input signal from the input connector (80) to the modulation electrode structure (26,34), while matching the output impedance of the microstrip line (38) to the input impedance of the waveguide (24) to maximize the coupling efficiency and minimize return loss. The modulato GOVERNMENT RIGHTS This invention was made with Government support under Contract No. N66604-87-C-1126 awarded by the Department of the Navy.

Compensation For Optical Damage Of Directional-Coupler Switches
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US Patent:

46904883, Sep 1, 1987
Filed:

May 3, 1984
Appl. No.:

6/606507
Inventors:

Caroline M. Gee - Woodland Hills CA
Gary D. Thurmond - Thousand Oaks CA
Assignee:

Hughes Aircraft Company - Los Angeles CA
International Classification:

G02B 610
US Classification:

350 9612
Abstract:

The present invention is directed to a process and product of a process in the field of optical directional coupler switches. The application of laser light to the input ports of a coupler switch at a power level approximately twice or greater the operational power level that has been discovered to cause optical damage produces a remedial effect of stabilizing the switching characteristics of the optical coupler switch. The resulting optical coupler switch has improved transmission characteristics when measured by a transfer function over that of an untreated coupler switch.