Christopher D Depriest

US Patent:

6735229, May 11, 2004

Filed:

May 22, 2003

Appl. No.:

10/443495

Inventors:

Peter J. Delfyett - Geneva FL
Tolga Yilmaz - Orlando FL
Christopher M. Depriest - Winter Park FL

Assignee:

University of Central Florida - Orlando FL

International Classification:

H01S 300

US Classification:

372 3808, 372 18, 372 26

Abstract:

Methods and systems for using a laser type clock to produce a train of ultra-stable optical pulses. The methods and systems include generating an approximately 10 GHz ultralow noise pulse train from a harmonically modelocked laser having an intracavity Fabry-Perot etalon filter from a semiconductor lasers such as ring lasers, and the like. System output can have residual phase modulation(PM) noise values of approximately 18 fs and amplitude modulation(AM) noise values of approximately 0. 05% RMS, and residual phase modulation(PM) noise values of approximately 94 fs and amplitude modulation(AM) noise values of approximately 0. 05% RMS.

US Patent:

7397828, Jul 8, 2008

Filed:

Jun 28, 2005

Appl. No.:

11/169212

Inventors:

Christopher M. DePriest - Tavares FL, US
Mark A. Decker - Orlando FL, US
Matthew D. Hawk - Orlando FL, US
Steven J. Lindauer - Orlando FL, US
Laurance S. Lingvay - Longwood FL, US
Gary D. Ross - Longwood FL, US
Douglas P. Stanley - Longwood FL, US

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01S 3/113
H01S 3/22
H01S 3/08

US Classification:

372 11, 372 55, 372 92

Abstract:

A laser system comprises a reflective chamber capable of housing a laser medium and at least two laser diodes emitting light at different respective wavelengths into the reflective chamber. The wavelength of each respective laser diode may be selected to minimize fluctuations in absorption by the laser medium of light emitted by the diode bars as the wavelength of each respective laser diode changes due to changes in an operating temperature of the laser system. The wavelength of each respective laser diode may be selected such that absorption by the laser medium of the wavelength of light emitted by one laser diode increases and absorption by the laser medium of the wavelength of light emitted by another laser diode decreases as the operating temperature changes within a predefined range.

US Patent:

20090225392, Sep 10, 2009

Filed:

Mar 10, 2008

Appl. No.:

12/045513

Inventors:

Christopher Michael DePriest - Tavares FL, US
Gary Dean Ross - Longwood FL, US

International Classification:

G02F 1/03

US Classification:

359245

Abstract:

An optical modulator comprises a Q-switch comprising a first pyroelectric crystal having opposing end faces disposed along a first pyroelectric axis, and a charge dissipating device comprising a second pyroelectric crystal having opposing end faces disposed along a second pyroelectric axis. The charge dissipating device is configured to provide pyroelectric charge from the opposing end faces of the second pyroelectric crystal to neutralize pyroelectric charge on opposing end faces of the first pyroelectric crystal.

US Patent:

6671298, Dec 30, 2003

Filed:

May 22, 2003

Appl. No.:

10/443492

Inventors:

Peter J. Delfyett - Geneva FL
Tolga Yilmaz - Orlando FL
Christopher M. Depriest - Winter Park FL

Assignee:

University of Central Florida - Orlando FL

International Classification:

H01S 310

US Classification:

372 26, 372 9, 372 31

Abstract:

Photonic arbitrary waveform methods and generation by manipulating the phase-locked longitudinal modes of an approximately 12. 4 GHz fundamentally modelocked external-cavity semiconductor laser are demonstrated. Photonically synthesized sine waves (center frequency of approximately 37. 2 GHz, linewidth less than approximately 100 Hz, dynamic range approximately 50 dB at approximately 100 Hz resolution bandwidth) and complex, arbitrarily shaped optical/microwave frequency waveforms with instantaneous bandwidths up to approximately 75 GHz are shown. A WDM filter can be used to separate individual longitudinal modes of a modelocked laser. Photonic arbitrary generation occurs through the modulation of individual channels before recombining the channels, followed by amplifying the output.