Search

Douglas A Sprock

from Grand Junction, CO
Age ~57

Douglas Sprock Phones & Addresses

  • Grand Junction, CO
  • Auxvasse, MO
  • Denver, CO
  • Palo Alto, CA
  • 5049 Abbotford Ct, Newark, CA 94560
  • San Jose, CA

Publications

Us Patents

Method And Apparatus To Sense Temperature Of Thermal Tuning Elements In Tunable Optical Devices

View page
US Patent:
6798800, Sep 28, 2004
Filed:
Dec 30, 2002
Appl. No.:
10/334509
Inventors:
Douglas A. Sprock - San Jose CA
Robert A. Carney - Belmont CA
Timothy L. Robertson - Vallejo CA
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S 304
US Classification:
372 34
Abstract:
A tunable optical unit includes a resistive temperature device (RTD), a thermal tuning device and a measurement circuit. The RTD has a resistance dependent on a temperature of the thermal tuning device. The measurement circuit outputs a signal that is dependent on the resistance of the RTD. The signal is used to control the temperature of the thermal tuning device in tuning the tunable optical unit. A reference resistance can be connected in series with the RTD to make ratio-metric measurements to determine the RTDs resistance (and hence the temperature of the tuning elements) without having to know the value of the current conducted through the RTD and to reduce sensitivity to fluctuations in the excitation signal.

Tunable Laser Control System With Optical Path Length Modulation

View page
US Patent:
6829259, Dec 7, 2004
Filed:
Jan 30, 2003
Appl. No.:
10/355731
Inventors:
George D. Pontis - Redwood City CA
Douglas A. Sprock - San Jose CA
Robert Carney - Belmont CA
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S 310
US Classification:
372 20, 372 381
Abstract:
A laser system including a controller for monitoring and controlling various functions of a laser assembly. The laser controller may include a wavelength tuning circuit for adjusting and locking the wavelength of the external cavity. To perform various monitoring and control functions, the controller may include circuitry for monitoring various parameters associated with operation of the laser, such as temperature indicating signals and/or signals from light detectors such as photodiodes.

Synchronous Servo Control For A Tunable Laser

View page
US Patent:
6829268, Dec 7, 2004
Filed:
Dec 23, 2002
Appl. No.:
10/329104
Inventors:
George D. Pontis - Redwood City CA
Douglas A. Sprock - San Jose CA
Robert A. Carney - Belmont CA
Ken P. Koller - Half Moon Bay CA
Rajesh K. Batra - Palo Alto CA
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S 313
US Classification:
372 3808, 372 2901, 372 29011, 372 2902, 372 3801, 372 3802, 372 3807, 372 29015
Abstract:
Tunable laser systems use servo control loops to control and monitor laser parameters such as channel, temperature, and power. The many control loops operate asynchronously, which means that noise generated by input sampling and/or output updating from one or more loops could interfere with the sampled inputs of one or more of the other loops. Embodiments of the present invention synchronize setting and sampling of tunable laser parameters to reduce noise. Noise that is related to synchronized setting and sampling of tunable laser parameters allows the noise to be reduced to constant offsets to be compensated for in the laser parameters of interest.

Tunable Laser Temperature Sensing Control System

View page
US Patent:
6870867, Mar 22, 2005
Filed:
Jan 30, 2003
Appl. No.:
10/356199
Inventors:
George D. Pontis - Redwood City CA,
Douglas A. Sprock - San Jose CA,
Robert Carney - Belmont CA,
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S003/04
H01S003/10
US Classification:
372 34, 372 20
Abstract:
A laser system including a controller for monitoring and controlling various functions of a laser assembly. The laser controller may include a wavelength tuning circuit for adjusting and locking the wavelength of the external cavity. To perform various monitoring and control functions, the controller may include circuitry for monitoring various parameters associated with operation of the laser, such as temperature indicating signals and/or signals from light detectors such as photodiodes.

Tunable Laser And Laser Current Source

View page
US Patent:
6904070, Jun 7, 2005
Filed:
Jan 30, 2003
Appl. No.:
10/356190
Inventors:
George D. Pontis - Redwood City CA,
Douglas A. Sprock - San Jose CA,
Robert Carney - Belmont CA,
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S003/00
H01S003/10
US Classification:
372 3807, 372 20
Abstract:
A laser system including a controller for monitoring and controlling various functions of a laser assembly. The laser controller may include a wavelength tuning circuit for adjusting and locking the wavelength of the external cavity. To perform various monitoring and control functions, the controller may include circuitry for monitoring various parameters associated with operation of the laser, such as temperature indicating signals and/or signals from light detectors such as photodiodes.

Interrupt Driven Wavelength Locking

View page
US Patent:
6917632, Jul 12, 2005
Filed:
Dec 31, 2002
Appl. No.:
10/335776
Inventors:
Kenneth P. Koller - Moss Beach CA,
Rajesh K. Batra - East Palo Alto CA,
Robert A. Carney - Belmont CA,
Douglas A. Sprock - San Jose CA,
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S003/10
H01S003/13
H01S003/00
US Classification:
372 20, 372 9, 372 26, 372 29011, 372 3801
Abstract:
In one embodiment of the present invention, an apparatus operates a control loop for a tunable optical device. A digital reference signal is converted to an analog reference signal and then introduced into the optical path of the tunable optical device. An analog feedback signal, corresponding to the digital reference signal, is recovered from the tunable optical device. The analog feedback signal is converted to a digital feedback signal. The apparatus sends tuning information to the tunable optical device based on analysis of the digital reference signal and the digital feedback signal. In one embodiment, the tuning information is used for wavelength locking of the tunable optical device. In another embodiment, the operation of the control loop is synchronized with another function of the tunable optical device.

Tunable Laser With Wavelength Locking

View page
US Patent:
6940881, Sep 6, 2005
Filed:
Jan 30, 2003
Appl. No.:
10/355978
Inventors:
George D. Pontis - Redwood City CA,
Douglas A. Sprock - San Jose CA,
Robert Carney - Belmont CA,
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H01S003/13
US Classification:
372 2902, 372 32
Abstract:
A laser system including a controller for monitoring and controlling various functions of a laser assembly. The laser controller may include a wavelength tuning circuit for adjusting and locking the wavelength of the external cavity. To perform various monitoring and control functions, the controller may include circuitry for monitoring various parameters associated with operation of the laser, such as temperature indicating signals and/or signals from light detectors such as photodiodes.

Remote Reference Resistor

View page
US Patent:
6974934, Dec 13, 2005
Filed:
Dec 30, 2002
Appl. No.:
10/334344
Inventors:
Douglas A. Sprock - San Jose CA,
Robert A. Carney - Belmont CA,
David K. Thiesen - Bakersfield CA,
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H05B001/02
US Classification:
219497, 219499, 219483, 359132, 307117
Abstract:
An apparatus including a reference resistor for use with ratiometric temperature sensing of a device to be sensed. The resistive element has a resistance dependant upon a temperature of the device to be sensed and is electrically coupled to a reference resistor. The reference resistor is maintained at a substantially constant temperature by a temperature controller. A sensor circuit is electrically coupled to the resistive element and the reference resistor to sense their electrical parameters when a current passes through them.
Douglas A Sprock from Grand Junction, CO, age ~57 Get Report