David W Nielsen

US Patent:

20220239373, Jul 28, 2022

Filed:

Apr 12, 2022

Appl. No.:

17/718886

Inventors:

- Reston VA, US
David C. NIELSEN - Bridgewater NJ, US
Andrew Russell GRANT - Freehold NJ, US

International Classification:

H04B 10/112
G02B 27/09
H04B 10/118

Abstract:

Methods, devices, and systems are described for free space optical communication. An example device can comprise a defocuser configured to receive an optical signal from a laser and control a beam divergence of the optical signal. The device can comprise a controller configured to cause the defocuser to adjust the beam divergence based on an operational mode of the laser.

US Patent:

20210067248, Mar 4, 2021

Filed:

Aug 30, 2019

Appl. No.:

16/556962

Inventors:

- Arlington VA, US
David C. Nielsen - Bridgewater NJ, US
Andrew Russell Grant - Freehold NJ, US

International Classification:

H04B 10/112
H04B 10/118
G02B 27/09

Abstract:

Methods, devices, and systems are described for free space optical communication. An example device can comprise a defocuser configured to receive an optical signal from a laser and control a beam divergence of the optical signal. The optical signal can comprise a data signal and a beacon signal. The device can comprise a controller configured to cause the defocuser to adjust the beam divergence based on an operational mode of the laser.

US Patent:

20200274620, Aug 27, 2020

Filed:

Dec 13, 2019

Appl. No.:

16/714021

Inventors:

- Arlington VA, US
David C. Nielsen - Bridgewater NJ, US
Andrew Russell Grant - Freehold NJ, US

International Classification:

H04B 10/50
H04L 1/00
H04B 10/118
H04L 1/20

Abstract:

The present application is directed to an optical terminal including two linearly polarized optical transmit beams configured to exhibit a time-delay therebetween. The optical terminal may include a quarter-wave plate such that the linearly polarized transmit beam becomes circularly polarized. The optical terminal may also include a receiving ground terminal including a properly oriented quarter-wave plate for separating and directing the two recovered linearly polarized beams. The application is also directed to a method for reconstructing an originally transmitted data stream.