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LPI in pulsed laser space communications
IEEE Journal on Selected Areas in Communications, 1993A basic low-probability of intercept (LPI) study for a pulsed-laser pulse position modulated (PPM) optical link with a colocated direct detection intercepting receiver is presented. The latter is considered to be a form of optical radiometer using continuous threshold testing to detect the presence of the transmitting laser.
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Limitations on lasers for deep space communication
IEEE Transactions on Communication and Electronics, 1963Because of the increased efficiency made possible by narrower beam widths at visible-light frequencies, laser communication systems have certain advantages over conventional radio systems. However, unless elaborate and costly precision tracking gear is used, extremely narrow beam widths prohibit high reliability of reception.
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Free-space laser ranging and data communication
2009 6th Workshop on Positioning, Navigation and Communication, 2009Ranging measurements in the radio band have been extensively used in space-based applications, for example in GNSS for navigation and GRACE for mapping the Earth's gravity field. However, the increasing demand in high-bandwidth communication and precision ranging will make optical systems ideal for these applications.
Juan Jose Esteban +4 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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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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Free-Space Laser Communication Terminals
2024 International Conference Laser Optics (ICLO)D.A. Boyarov +6 more
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Space communication and radar with lasers
SPIE Proceedings, 2005Sensitive heterodyne detection with lasers applied .to radar and satellite communication is seriously hampered by the large electronic bandwidth due to random Doppler shift and frequency instability. These drawbacks can be circumvented by dual signal heterodyne detection.
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Resonant laser receiver for free-space laser communications
SPIE Proceedings, 1992ABSTRACT Our approach to high receiver sensitivity is based on the optical field retaining its temporalform (and its coherence properties) despite attenuation on long-distance propagation. A field whose power corresponds to infrequent photon arrivals, if resonant with a high-finesseetalon, sees the full 100-percent transmittance, consistent with ...
Robert J. Smith +2 more
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Free Space Laser Communication Terminals
MILCOM 1985 - IEEE Military Communications Conference, 1985Free space laser communication terminals capable of acquiring and communicating over a 100 mile range at a data rate of up to 19.2 Kb/s, were developed to demonstrate the feasibility of a point-to-point semiconductor-laser communication system, and to aid in the design of future systems.
William A. Seaman, Robert A. Lewis
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