Stephan W Schulz

US Patent:

6681250, Jan 20, 2004

Filed:

May 3, 2000

Appl. No.:

09/563434

Inventors:

Christopher L. Thomas - Madison AL
Robin L. Anderson - Winchester TN
Robert L. Gilgen - Westford MA
Mark DesMarais - Northboro MA
William J. Pinkston - Fayetteville TN
Jamie F. Collins - Huntsville AL
Stephan Schulz - Bethesda MD

Assignee:

Avocent Corporation - Huntsville AL

International Classification:

G06F 15173

US Classification:

709226, 709203

Abstract:

A keyboard/video/mouse (KVM) switching protocol is disclosed in which KVM information is applied to a network of workstations. At least one data converter communicates on the workstation network and retrieves KVM information from the workstation network that is addressed to a server assigned to the converter. The converter places the KVM information in a format suitable to the assigned server and applies the converted KVM information to the appropriate standard device ports of the server. The system provides motherboard access to the servers that is characteristics of KVM switches but provides essentially unlimited scalability not known in traditional KVM switches.

US Patent:

7555567, Jun 30, 2009

Filed:

Aug 14, 2003

Appl. No.:

10/640257

Inventors:

Christopher L. Thomas - Madison AL, US
Robin L. Anderson - Winchester TN, US
Robert L. Gilgen - Westford MA, US
Mark DesMarais - Northboro MA, US
William J. Pinkston - Fayetteville TN, US
Jamie F. Collins - Huntsville AL, US
Stephan Schulz - Bethesda MD, US

Assignee:

Avocent Corporation - Huntsville AL

International Classification:

G06F 15/16

US Classification:

709250, 709246, 709217, 709218, 709219

Abstract:

A keyboard/video/mouse (KVM) switching protocol is disclosed in which KVM information is applied to a network of workstations. At least one data converter communicates on the workstation network and retrieves KVM information from the workstation network that is addressed to a server assigned to the converter. The converter places the KVM information in a format suitable to the assigned server and applies the converted KVM information to the appropriate standard device ports of the server. The system provides motherboard access to the servers that is characteristics of KVM switches but provides essentially unlimited scalability not known in traditional KVM switches.

US Patent:

20140036332, Feb 6, 2014

Filed:

Aug 1, 2013

Appl. No.:

13/956961

Inventors:

Stephan Schulz - Bethesda MD, US

Assignee:

Digital Signal Corporation - Chantilly VA

International Classification:

G02B 7/182

US Classification:

3592212

Abstract:

A control system structure is provided that improves system bandwidth without affecting optimization for other performance criteria (such as, suppressing loop disturbances, or other optimization criteria) and stability of a closed-loop system.

US Patent:

20220268905, Aug 25, 2022

Filed:

Mar 14, 2022

Appl. No.:

17/693641

Inventors:

- Mountain View CA, US
Kendall L. Belsley - Falls Church VA, US
Stephan Schulz - Bethesda MD, US

Assignee:

Aeva, Inc. - Mountain View CA

International Classification:

G01S 7/4911
G01S 7/4915
G01S 7/497
G01J 9/02
H01S 3/10
H01S 3/13
H01S 3/00
G01J 9/00
G02B 26/06
G01S 17/34

Abstract:

Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.

US Patent:

20220252704, Aug 11, 2022

Filed:

Jan 24, 2022

Appl. No.:

17/582402

Inventors:

- Mountain View CA, US
Kendall L. Belsley - Falls Church VA, US
Stephan Schulz - Bethesda MD, US

Assignee:

Aeva, Inc. - Mountain View CA

International Classification:

G01S 7/4911
G01S 7/4915
G01S 7/497
G01J 9/02
H01S 3/10
H01S 3/13
H01S 3/00
G01J 9/00
G02B 26/06
G01S 17/34

Abstract:

Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.

US Patent:

20210396877, Dec 23, 2021

Filed:

Feb 1, 2021

Appl. No.:

17/164581

Inventors:

- Calabasas CA, US
Stephan Schulz - Bethesda MD, US

International Classification:

G01S 17/26
G01S 7/481
G01S 7/4912
G01S 17/58
G01S 17/34

Abstract:

A lidar comprises a first laser source configured to generate a first laser output at a first frequency and a second laser source configured to generate a second laser output at a second frequency, wherein the first frequency is different from the second frequency. A combining coupler combines the first laser output and the second laser output into a combined output. The combined output is carried by an optical fiber to a fiber tip where the combined output is transmitted as a transmit signal toward a target. A reflected portion of the transmit signal reflected back from a point on the target is received. A mixing coupler mixes the received reflected portion of the transmit signal with a second portion of the combined output and outputs a mixed signal. A wavelength filter separates the mixed signal into a first mixed signal corresponding to the first frequency of the first laser source and a second mixed signal corresponding to the second frequency of the second laser source. A first detector detects the first mixed signal, and a second detector mixed the second received signal. The detected first mixed signal and the detected second mixed signal may be used to determine a range and a Doppler velocity of the point on the target.

US Patent:

20200011980, Jan 9, 2020

Filed:

Feb 11, 2019

Appl. No.:

16/272209

Inventors:

- Calabasas CA, US
Kendall L. Belsley - Falls Church VA, US
Stephan Schulz - Bethesda MD, US

International Classification:

G01S 7/491
G01S 7/497
G01J 9/02
G01J 9/00
G01S 17/32
G02B 26/06
H01S 3/10
H01S 3/13
H01S 3/00

Abstract:

Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.

US Patent:

20180329042, Nov 15, 2018

Filed:

Jul 11, 2018

Appl. No.:

16/032852

Inventors:

- Pasadena CA, US
Kendall L. Belsley - Falls Church VA, US
Stephan Schulz - Bethesda MD, US

International Classification:

G01S 7/491
H01S 3/00
H01S 3/13
H01S 3/10
G01J 9/02
G02B 26/06
G01J 9/00
G01S 7/497
G01S 17/32

Abstract:

Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.