Kevin Mark Killian, 6323 Whitman Pl, Hillsdale, NJ 07642

4900918, Feb 13, 1990

Aug 6, 1987

7/082255

Kevin M. Killian - Hackensack NJ

Allied-Signal Inc. - Morris Township, Morris County NJ

H01J 516
G01D 534

250227

A pair of resonant optical cavities are used to measure shifts in length of a beam which deflects under acceleration. One end of each optical cavity is highly reflective and the other end partially reflective, thus permitting resonating light to exit the resonators. The light outputs of the two resonators is combined and the resultent beat frequency is used to detect deflections of the beam.

4876447, Oct 24, 1989

Aug 6, 1987

7/082258

Kevin M. Killian - Hackensack NJ

Allied-Signal Inc. - Morris County, Morris Township NJ

H01J 516
G01D 534

250227

Optical interferometric techniques are used in order to measure deflection in a cantilever beam. Light is directed through plural light paths which are changed in length during deflection of the beam. The light recombines and light interferance is used to measure deflection of the beams.

6327277, Dec 4, 2001

Dec 17, 1998

9/215834

Kevin Mark Killian - Hillsdale NJ

Honeywell International Inc. - Morristown NJ

H01S 330
H01S 313
H01S 500
G02B 626
G01B 902

372 6

The output wavelength of a laser-diode pumped fiber source can be stabilized at its minimum value irrespective of temperature and the age of the laser diode by the seeking the minimum output wavelength of the fiber source. By introducing a dither on the temperature of the pump laser diode, a measurement feedback loop can be used to determine the optimal value of the temperature. Once determined, the temperature is used to fix the wavelength of the source.

5278631, Jan 11, 1994

Apr 24, 1992

7/873911

Walter P. Hollinger - Mahwah NJ
Kevin M. Killian - Lincoln Park NJ
Robert A. Kovacs - West Orange NJ

Allied Signal Inc. - Morris Township, Morris County NJ

G01C 1964

356350

A closed loop fiber optic gyro features signal processing wherein square wave phase modulation is added to a modulation drive signal after overflow logic so that the square wave modulation will not cause a phase modulation ramp to exceed overflow/underflow logic limits. The arrangement is such that the phase modulation causes a retrace with each modulation period when the amplitude of the ramp is within predetermined limits. The square wave amplitude from a cycle immediately after a retrace is considered as errant data that should be excluded from a phase nulling loop. Thus, the phase nulling loop has more accurate input data so that feedback will be accomplished more effectively for improved gyro performance.

5898496, Apr 27, 1999

Feb 14, 1997

8/800944

Sidney Xi-Yi Huang - Westwood NJ
Naveen Sarma - Rutherford NJ
Kevin Mark Killian - Hillsdale NJ
James Edward Goodwin - Ramsey NJ

G01C 912

356350

The RIN (random intensity noise) component of the random walk error of a fiber optic gyroscope can be reduced by utilizing an unpolarized light signal during processing. By depolarizing the light wave modulated by the fiber optic sensing coil or combining it with the unmodulated light wave of orthogonal polarization, a 3 db reduction in RIN can be achieved.

5309220, May 3, 1994

Apr 24, 1992

7/873133

Walter P. Hollinger - Mahwah NJ
Kevin M. Killian - Lincoln Park NJ
Robert A. Kovacs - West Orange NJ

AlliedSignal Inc. - Morris Township, Morris County NJ

G01C 1964

356350

A closed loop fiber optic gyro features signal processing wherein square wave phase modulation is added to a modulation drive signal after overflow logic so that the square wave modulation will not cause a phase modulation ramp to exceed overflow/underflow logic limits. The arrangement is such that the phase modulation causes a retrace with each modulation period when the amplitude of the ramp is within predetermined limits. A variable time constant in a retrace correction loop gives better retrace limit correction performance when the gyro is first turned on as during a "warm-up" period. The amplitude of the gyro square wave output is determined by taking the difference between the output of the first half cycle of the square wave modulation and the average of adjacent second half cycles thereof. An error signal for a retrace limit is developed by considering changes in the square wave amplitude and not the square wave amplitude itself. Corrections in the retrace limit are implemented via a variable digital retrace point.

5280339, Jan 18, 1994

Apr 24, 1992

7/873910

Walter P. Hollinger - Mahwah NJ
Kevin M. Killian - Lincoln Park NJ
Robert A. Kovacs - West Orange NJ

AlliedSignal Inc. - Morris Township, Morris County NJ

G01C 1964

356350

A closed loop fiber optic gyro features signal processing wherein square wave phase modulation is added to a modulation drive signal after overflow logic so that the square wave modulation will not cause a phase modulation ramp to exceed overflow/underflow logic limits. The arrangement is such that the phase modulation causes a retrace with each modulation period when the amplitude of the ramp is within predetermined limits. Corrections to the retrace limit are implemented so as to scale a digital output, which enables the determination of accumulated gyro angle with a finer resolution than simple output pulse accumulation as has heretofore been the case.