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InGaAs multiple quantum well modulating retro-reflector for free-space optical communications
2002
Free-Space Laser Communication and Laser Imaging
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Modulating retro-reflectors provide a means for free space optical communication without the need for a laser, telescope or pointer tracker on one end of the link. ...
Over the last few years the Naval Research Laboratory has developed modulating retro-reflector based on corner cubes and large area Transmissive InGaAs multiple quantum well modulators. ...
ACKNOWLEDGEMENTS We acknowledge the support ofthe Office of Naval Research. ...
doi:10.1117/12.453228
fatcat:druxgl4opng6laknpuncdjm3ey
Cat's eye quantum well modulating retroreflectors for free-space optical communications
2003
Free-Space Laser Communication Technologies XV
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Modulating retro-reflectors (MRR) couple passive optical retro-reflectors with electro-optic modulators to allow free-space optical communication with a laser and pointing/acquisition/tracking system required ...
The optical aperture of an MRR cannot be too small or the amount of light retro-reflected will be insufficient to close the link. ...
Acknowledgements We acknowledge the support of the Office of Naval Research, the NASA Earth Science Technology Office and DARPA. ...
doi:10.1117/12.478938
fatcat:ai62tjl4yrfljkna26wfdsfjjq
Performance of cat's eye modulating retro-reflectors for free-space optical communications
2004
Free-Space Laser Communications IV
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Modulating retro-reflectors (MRR) couple passive optical retro-reflectors with electro-optic modulators to allow free-space optical communication with a laser and pointing/acquisition/tracking system required ...
The optical aperture of an MRR cannot be too small or the amount of light retro-reflected will be insufficient to close the link. ...
ACKNOWLEDGEMENTS We acknowledge the support of the Office of Naval Research, the NASA Earth Science Technology Office and DARPA. ...
doi:10.1117/12.561604
fatcat:x2rxhl5pcra4zhnya3jmifjcwq
Spatial intensity correlation and aperture averaging measurements in a 20 mile retroreflected lasercom link
2004
Free-Space Laser Communication and Active Laser Illumination III
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The test bed uses a bi-static transmitter/receiver arrangement on the western shore of the Chesapeake Bay and various configurations of 5 cm retro-reflectors on the eastern shore to produce a 32 km retro-reflected ...
of retro-reflectors and their geometry. ...
The solid black line is the calculated aperture averaging factor for a single 5 cm retro-reflector on the Tilghman Island tower. ...
doi:10.1117/12.507864
fatcat:vkd6c5wvxrhdrgrileqqwkeowu
A cat's eye multiple quantum-well modulating retro-reflector
2003
IEEE Photonics Technology Letters
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A new kind of modulating retro-reflector using cat's eye optics and a multiple quantum well electro-absorption modulator array is described. ...
The use of the device in free space optical communication is discussed. Index Terms--). ...
Using a cat's eye retro-reflector it is possible to decouple the size of the retro-reflector optical aperture from the size of the modulator by placing the modulator at the focus. ...
doi:10.1109/lpt.2002.807904
fatcat:7zyz7ldfavfedhoeqwsegf2ypu
Modulating retro-reflector lasercom systems at the Naval Research Laboratory
2010
2010 - MILCOM 2010 MILITARY COMMUNICATIONS CONFERENCE
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Naval Research Laboratory (NRL) has been conducting research on FSO communications since 1998 with an emphasis on tactical applications. ...
Free space optical (FSO) communication has enjoyed a renewal of interest driven by increasing data rate requirements and the crowding of the RF spectrum, affecting both commercial and military sectors. ...
A modulating retro-reflector (MRR) can allow lasercom communication with platforms that would otherwise not be able to support lasercom communications. ...
doi:10.1109/milcom.2010.5680205
fatcat:o6yjv6pd4vb2lboibxb7s2e54q
Multiple quantum well based modulating retroreflectors for inter- and intra-spacecraft communication
2006
Photonics for Space Environments XI
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An alternative FSO terminal uses a modulating retro-reflector (MRR). MRRs shift most of the power, weight, and pointing requirements to one end of the link. ...
The MRR maintains the small beam divergence of a conventional optical communications link, but gains the loose pointing advantage of an RF link, reducing the pointing requirements. ...
of the retro-reflector aperture, is the wavelength of the light, and S is the Strehl ratio of the retro-reflector optic. ...
doi:10.1117/12.694907
fatcat:cotdektldfbiha3sow34s2wqfu
Compact lightweight payload for covert datalink using a multiple quantum well modulating retroreflector on a small rotary-wing unmanned airborne vehicle
2000
Airborne Reconnaissance XXIV
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Modulating retro-reflector systems couple an optical retro-reflector, such as a corner-cube, and an electro-optic shutter to allow two-way optical communications using a laser, telescope and pointer-tracker ...
The multiple quantum well modulating retro-reflector has the added advantage of being compact, lightweight, covert, and requires very low power. ...
ACKNOWLEDGEMENTS We would like to thank Peter Goetz for his help in obtaining the 10 Mbps data streams and to Norman Pollack for his many useful suggestions for payload integration on the UAV. ...
doi:10.1117/12.408692
fatcat:nijz7l6gwngkhfsb4uwocqymv4
A high-speed retro-reflector for free-space communication based on electro-optic phase modulation
2003
Canadian journal of physics (Print)
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We demonstrate that an electro-optic phase modulator (EOM) can be used as a constituent of a corner-cube-based modulated high-speed retro-reflector. ...
In these applications, the retro-reflector can be mounted on a moving platform such as a satellite. ...
This research was supported by the Canada Foundation for Innovation, Ontario Innovation Trust, York University, and the Natural Sciences and Engineering Research Council of Canada. ...
doi:10.1139/p03-051
fatcat:lo3dgnp5pzgw5hynipegiyzami
Scintillation measurements of broadband 980-nm laser light in clear air turbulence
2004
Free-Space Laser Communication and Active Laser Illumination III
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The PDFs transitioned from broad double peaked "beta -shaped" densities to log-normal ones as the retro-reflector spacing was increased to exceed the optical field lateral coherence length. ...
a function of retro-reflector lateral spacing over a short (75 m) atmospheric optical path. ...
Conclusions The performance of an optical communication link that uses retromodulators depends heavily on the placement of the individual retro-reflectors in order to avoid excess intensity fluctuations ...
doi:10.1117/12.504863
fatcat:6eanexhdrzfw7m2yf2lqkhanri
Requirements and challenges for tactical free-space Lasercomm
2008
MILCOM 2008 - 2008 IEEE Military Communications Conference
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Optical link service parameters and metrics are assessed in the context of available architecture and techniques, while the effectiveness of various technologies to mitigate atmospheric turbulence, poor ...
We present a brief overview of the current military communication infrastructure and future needs, before highlighting terrestrial Lasercomm technology status and trends, and lessons learned from several ...
MODULATING RETRO-REFLECTOR (MRR) OPTICAL LINKS As discussed earlier, 'retro-reflector mode' holds great promise for tactical communications. ...
doi:10.1109/milcom.2008.4753049
fatcat:l6e6izcy6bdu5aw7duzuvhyt6i
A 3 pJ/bit free space optical interlink platform for self-powered tetherless sensing and opto-spintronic RF-to-optical transduction
2021
Scientific Reports
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Unlike previous demonstrations of optically coupled sensor nodes, the device presented here amplifies signals and encodes data on the same optical beam that provides its power. ...
As a proof-of-concept application, the optical tag is combined with a spintronic microwave detector based on a magnetic tunnel junction (MTJ). ...
Materials Research Science and Engineering Center (DMR-1720139), the State of Illinois, and Northwestern University. ...
doi:10.1038/s41598-021-87885-6
pmid:33875725
fatcat:fj4cwxkccjhcpl4csq7oghfcqi
45-Mbit/s cat's-eye modulating retroreflectors
2007
Optical Engineering: The Journal of SPIE
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on only one end of the link. ...
This system decouples the size of the modulator from the size of the optical aperture and allows much higher data rates. A 45-Mbit/s free space link over a range of 7 km is demonstrated. ...
Acknowledgments We acknowledge the support of the Office of Naval Research. We acknowledge the optical design support of Jay Kumler of Coastal Optics Corporation. ...
doi:10.1117/1.2789634
fatcat:trfmvfbeqvfepg4t2lnvztpzhu
Research in free-space optical data transfer at the U.S. Naval Research Laboratory
2004
Free-Space Laser Communication and Active Laser Illumination III
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In this paper, a review of the progress and initiatives in free space optical data transfer and communications at the Naval Research Laboratory is presented. ...
NRL has been investing in research and development in optical communications and laser ranging, both conventional, and advanced. ...
ACKNOWLEDGEMENTS We would like to acknowledge the Office of Naval Research, NASA, and DARPA for their support. ...
doi:10.1117/12.507917
fatcat:si7tcjt2mzdq5oocbpjgek77oq
Underwater Optical Wireless Communication
2016
IEEE Access
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This paper not only provides exhaustive research in underwater optical communication but also aims to provide the development of new ideas that would help in the growth of future underwater communication ...
INDEX TERMS Underwater optical wireless, optical beam propagation, visible light, radio frequency, acoustic communication, hybrid optical-acoustic system, modulation and coding. 1518 2169-3536 2016 IEEE ...
the retro-reflector, A Retro is the retro-reflector aperture area, θ Retro is the divergence angle of retro-reflector and other parameters are defined earlier. ...
doi:10.1109/access.2016.2552538
fatcat:rpfv7m7vvzbinehfqmj7kxfp34
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