Christian K Keyser

US Patent:

20230046323, Feb 16, 2023

Filed:

Oct 3, 2022

Appl. No.:

17/937647

Inventors:

- Wright-Patterson AFB OH, US
Christian Keyser - Shalimar FL, US

International Classification:

G01S 17/89
G01S 7/486
G01S 7/484
G01S 17/42

Abstract:

Systems and methods for three-dimensional (3-D) imaging enabled by natural range-dependent processes. Multiple lasers are configured to independently flash illuminate a target object to - D image a resultant “scene” onto a focal plane array (FPA). The first laser produces a wavelength non-resonant with an atmospheric absorption line along the illumination path. The second laser produces a wavelength resonant with the atmospheric absorption line, and closely spaced with the non-resonant wavelength. A ratio of the respective intensities recorded at the FPA for the two wavelengths calculates a range to the target object.

US Patent:

20210088718, Mar 25, 2021

Filed:

Jul 6, 2020

Appl. No.:

16/920994

Inventors:

- Wright-Patterson AFB OH, US
Christian Keyser - Shalimar FL, US

International Classification:

G02B 6/02
H01S 5/10

Abstract:

A fiber laser system includes a high power pump laser, an optical fiber that is aligned to receive output from the high power pump laser. The fiber laser system includes a first pair of orthogonally opposed, periodic electrode structures longitudinally aligned on opposite first and second sides of the optical fiber. The fiber laser system includes a controller that is communicatively coupled to the first pair of periodic electrode structures. The controller performs variable period poling of the first pair of periodic electrode structures to achieve quasi-phase matching (QPM).

US Patent:

20200249355, Aug 6, 2020

Filed:

Feb 5, 2019

Appl. No.:

16/267638

Inventors:

- Wright-Patterson AFB OH, US
Christian Keyser - Shalimar FL, US

International Classification:

G01S 17/89
G01S 17/42
G01S 7/484
G01S 7/486

Abstract:

Systems and methods for three-dimensional (3-D) imaging enabled by natural range-dependent processes. Multiple lasers are configured to independently flash illuminate a target object to 3-D image a resultant “scene” onto a focal plane array (FPA). The first laser produces a wavelength non-resonant with an atmospheric absorption line along the illumination path. The second laser produces a wavelength resonant with the atmospheric absorption line, and closely spaced with the non-resonant wavelength. A ratio of the respective intensities recorded at the FPA for the two wavelengths calculates a range to the target object.