RALPH ALAN BERGH
Pilots at Southview Ln, Kissel Hill, PA
License number
Pennsylvania A2943647
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
10 Southview Ln, Kissel Hill, PA 17543
Professional information
President At Fibernetics Llc
Position:
President at Fibernetics LLC
Location:
Lititz, Pennsylvania
Industry:
Aviation & Aerospace
Work:
Fibernetics LLC
since Jan 2004
-
President
Education:
Stanford University 1977 - 1983
PhD, Applied Physics MIT 1976 - 1977
SB, Physics
PhD, Applied Physics MIT 1976 - 1977
SB, Physics
Method And Apparatus For Multiplexing Multiple Sagnac Interferometers With Single Input For Source Light
US Patent:
2013005, Feb 28, 2013
Filed:
May 7, 2011
Appl. No.:
13/696258
Inventors:
Ralph A. Bergh - Lititz PA, US
International Classification:
G01C 19/64
US Classification:
356459
Abstract:
A method and system for transmitting source light to a plurality of Sagnac interferometers includes a first directional coupler that splits the source light into a second light beam and a third light beam. The second light beam supplies light to a first Sagnac interferometer and the second light beam supplies light to a second directional coupler, and the first directional coupler also delivers light returning from the first Sagnac interferometer to a first detector that is used to indicate rotation of the first Sagnac interferometer. The second directional coupler splits the third light beam into a fourth light beam and a fifth light beam, and the fourth light beam supplies light to a second Sagnac interferometer. The second directional coupler delivers light returning from the second Sagnac interferometer to a second detector, and the second detector provides a signal indicative of rotation of the second Sagnac interferometer.
Sagnac Interferometer With Bundle-Fiber Coil
US Patent:
2013005, Feb 28, 2013
Filed:
May 2, 2011
Appl. No.:
13/695858
Inventors:
Ralph A. Bergh - Lititz PA, US
International Classification:
G02B 6/26, G01C 19/72, G01B 9/02, G02B 6/255
US Classification:
356465, 385 50, 385 95, 356483
Abstract:
A method in which a ribbon fiber, containing a plurality of waveguides each having a first end and a second end, is wound into a coil and the second end of a first waveguide is coupled together with the first end of a second waveguide such that light in said first waveguide will transfer to said second waveguide.
Occasional Calibration Phase-Difference Modulation For Sagnac Interferometer
US Patent:
8610995, Dec 17, 2013
Filed:
Jul 14, 2010
Appl. No.:
13/388924
Inventors:
Ralph A. Bergh - Lititz PA, US
International Classification:
G02F 1/01
US Classification:
359279
Abstract:
An occasional calibration waveform is used to, first, make an interferometer sensitive to small changes in Sagnac phase difference due to rotating the gyroscope (this is commonly referred to as biasing the interferometer); second, supply a feedback phase difference to keep the interferometer sensitive to small changes in rotation rate; and third, supply the calibration modulation necessary to keep the digital electronics calibrated with respect to the Sagnac phase difference being measured.