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The lunar laser communications demonstration
2011 International Conference on Space Optical Systems and Applications (ICSOS), 2011The Lunar Laser Communications Demonstration represents NASA's first attempt to demonstrate optical communications from a lunar orbiting spacecraft to an Earth-based ground receiver. A low size, weight and power optical terminal will be integrated onto the Lunar Atmosphere and Dust Environment Explorer (LADEE) spacecraft, presently scheduled to launch ...
Bryan Robinson +3 more
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2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497), 2002
Summary form only given. Compared with conventional RF systems several significant advantages offered by laser communication (lasercom) systems in space applications that are simple consequences of the short wavelengths (high frequencies) associated with optical waves.
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Summary form only given. Compared with conventional RF systems several significant advantages offered by laser communication (lasercom) systems in space applications that are simple consequences of the short wavelengths (high frequencies) associated with optical waves.
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Interplanetary Laser Communications
Optics and Photonics News, 2007Lasers could enable deep-space communication between Earth and planets at the farthest reaches of our solar system. Over the next two decades, optical communications technology is expected to deliver at least an order-of-magnitude higher data rate than conventional radio frequency systems from deep space.
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A Semiconductor Laser For Laser Communications Applications
SPIE Proceedings, 1989A coherent array of 10 amplifiers has been demonstrated using an active integrated optics technology based on AlGaAs laser diode material. These arrays have demonstrated power outputs of 300 mW CW with only 2 mW injected power. The fractional coherence between any two amplifiers in the array is greater than 0.8. These arrays have been used to amplify a
M. S. Zediker +11 more
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Laser beam combiner: applications to space-borne laser communications
Applied Optics, 1982An attractive source for spaceborne laser communications is the directly modulated single-mode GaAs/GaAlAs injection laser. GaAlAs lasers, however, show low power per diode and wide beam divergence. A simple optical concept for a laser beam combiner overcomes diode laser limitations: an array of closely packed parallel collimated laser beams can be ...
R F, Begley, D, Goux, D W, Chen, O, Giat
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Physics Bulletin, 1970
W K Pratt Sussex: John Wiley 1969 pp xi + 271 price £6 12s This book is a valiant attempt to compress into a small space a quantitative presentation of some of the main problems in the design of optical communication systems. The text is based upon work by the author and his colleagues for NASA and the Hughes Aircraft Co. and its lecture note style may
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W K Pratt Sussex: John Wiley 1969 pp xi + 271 price £6 12s This book is a valiant attempt to compress into a small space a quantitative presentation of some of the main problems in the design of optical communication systems. The text is based upon work by the author and his colleagues for NASA and the Hughes Aircraft Co. and its lecture note style may
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Planetary Laser Communications
Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008Status of planetary high-rate laser communications and precision laser ranging is reviewed. Orders of magnitude improvement over the state-of-the-art is anticipated.
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2009
A communication system is designed to transmit and receive information. The information to be sent is generally superimposed by modulation onto an electromagnetic wave called a carrier. It is then transmitted to a receiver where the information is recovered by demodulation. Various types of communication systems are often designated by the location of
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A communication system is designed to transmit and receive information. The information to be sent is generally superimposed by modulation onto an electromagnetic wave called a carrier. It is then transmitted to a receiver where the information is recovered by demodulation. Various types of communication systems are often designated by the location of
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Deep space laser communications
SPIE Proceedings, 2016A number of laser communication link demonstrations from near Earth distances extending out to lunar ranges have been remarkably successful, demonstrating the augmented channel capacity that is accessible with the use of lasers for communications. The next hurdle on the path to extending laser communication and its benefits throughout the solar system ...
Abhijit Biswas +6 more
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Laser pulse code communication
IEEE Journal of Quantum Electronics, 1969If a 3-kHz bandwidth is assumed for voice communication by PCM, and a 16-level (4 bit) quantization for an intelligible pulse code format, the gas laser must be capable of a minimum pulse rate of 30 kHz. To attain such a high pulse rate, it is necessa.ry to reduce the pulse width while increasing the repetition rate.
G. Malmrose, R. Mackey
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