Zobrazeno 1 - 10
of 62
pro vyhledávání: '"David J. Geisler"'
Publikováno v:
IEEE Photonics Journal, Vol 4, Iss 3, Pp 748-758 (2012)
This paper describes and demonstrates a single-shot, full-field (amplitude and phase) optical waveform measurement technique that utilizes interferometry, frequency-to-time mapping, and four-quadrature coherent detection. This generalized frequency-t
Externí odkaz:
https://doaj.org/article/05e6f84d375644ffa854a4050b1c0ab8
Publikováno v:
IEEE Photonics Journal, Vol 3, Iss 6, Pp 1013-1022 (2011)
This paper demonstrates a flexible bandwidth-modulation-capable and bandwidth scalable transmitter and receiver technique based on dynamic optical arbitrary waveform generation (OAWG) and measurement (OAWM). This technique generates and receives broa
Externí odkaz:
https://doaj.org/article/7198964409df42fe8fe9faa3f49be1e2
Autor:
James M. Dailey, Timothy Koch, Jim Delatore, John Kolchmeyer, Saima Husaini, Mihaela Dinu, Jane Le Grange, Boris Yagudayev, Andrew Stenard, Lucas T. Crandall, Gregory Szczepanik, Nicole C. Wendt, Anthony Monte, Thomas Wood, Bob Schulein, David J. Geisler
Publikováno v:
Free-Space Laser Communications XXXIV.
Autor:
David J. Geisler
Publikováno v:
Conference on Lasers and Electro-Optics.
Custom coherent architectures can provide many advantages for FSO communications systems through co-development of integrated photonics, ASIC- or FPGA-based DSP algorithms, and system design to mitigate atmospheric turbulence and reduce pointing requ
Autor:
David J. Geisler
Publikováno v:
OFC
NASA’s Orion spacecraft will employ free-space optical communications over 400,000-km from the lunar vicinity to Earth, using an 80-Mb/s downlink and a 20-Mb/s uplink. This paper discusses an overview of the link and optical modem.
Autor:
Curt Schieler, K. S. Y. Wong, Bryan S. Robinson, R. T. Schulein, Scott A. Hamilton, N. W. Spellmeyer, Farhad Hakimi, P. S. Bedrosian, J. P. Wang, David J. Geisler, David O. Caplan
Publikováno v:
2019 IEEE International Conference on Space Optical Systems and Applications (ICSOS).
Free-space optical (FSO) communications systems are under development by NASA to support a wide variety of missions (e.g., long-distance deep-space links and near-Earth low-Earth orbiting (LEO) links) that propagate through the turbulent atmospheric
Autor:
Curt Schieler, G. Lund, N. K. Fontaine, Bryan S. Robinson, Timothy M. Yarnall, Michael L. Stevens, David J. Geisler, Scott A. Hamilton
Publikováno v:
Free-Space Laser Communication and Atmospheric Propagation XXX.
Free-space optical communications links have the perpetual challenge of coupling light from free-space to a detector or fiber for subsequent detection. It is especially challenging to couple light from free-space into single-mode fiber (SMF) in the p
Autor:
James Torres, J. P. Wang, David J. Geisler, M. Hogan, Michael L. Stevens, D. M. Boroson, Bryan S. Robinson, Farzana I. Khatri, Tina Shih, O. V. Mikulina, William Hubbard, Steven Constantine, N. W. Spellmeyer, Antonios Seas, Jamie W. Burnside, R. Butler, Cathy E. DeVoe, Timothy M. Yarnall, T. King, Owen Guldner
Publikováno v:
Free-Space Laser Communication and Atmospheric Propagation XXX.
In recent years, NASA has been developing a scalable, modular space terminal architecture to provide low-cost laser communications for a wide range of near-Earth applications. This development forms the basis for two upcoming demonstration missions.
Autor:
G. Lund, Scott A. Hamilton, Bryan S. Robinson, Curt Schieler, Timothy M. Yarnall, Michael L. Stevens, David J. Geisler
Publikováno v:
Advanced Photonics 2018 (BGPP, IPR, NP, NOMA, Sensors, Networks, SPPCom, SOF).
Next-generation optical ground stations will need to have scalable collection areas while simultaneously providing efficient coupling from free space to single-mode fiber. We present a multi-aperture multi-spatial-mode receiver architecture along wit
Autor:
Bryan S. Robinson, David J. Geisler, Curt Schieler, Michael L. Stevens, Timothy M. Yarnall, Scott A. Hamilton
Publikováno v:
2017 IEEE Photonics Conference (IPC).
We discuss an optical ground terminal receiver architecture based on multi-aperture digital coherent combining. Experimental results using four receivers demonstrate lossless coherent combining in the laboratory at power levels below 0.1 photons/bit/