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LASER Communication - paulgmathew - 10-04-2017
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Laser communications offer a viable alternative to RF communications for inter satellite links and other applications where high-performance links are a necessity. High data rate, small antenna size, narrow beam divergence, and a narrow field of view are characteristics of laser communications that offer a number of potential advantages for system design.
Lasers have been considered for space communications since their realization in 1960. Specific advancements were needed in component performance and system engineering particularly for space qualified hardware. Advances in system architecture, data formatting and component technology over the past three decades have made laser communications in space not only viable but also an attractive approach into inter satellite page link applications.
Information transfer is driving the requirements to higher data rates, laser cross -link technology explosions, global development activity, increased hardware, and design maturity. Most important in space laser communications has been the development of a reliable, high power, single mode laser diode as a directly modulable laser source. This technology advance offers the space laser communication system designer the flexibility to design very lightweight, high bandwidth, low-cost communication payloads for satellites whose launch costs are a very strong function of launch weigh. This feature substantially reduces blockage of fields of view of most desirable areas on satellites. The smaller antennas with diameter typically less than 30 centimeters create less momentum disturbance to any sensitive satellite sensors. Fewer on board consumables are required over the long lifetime because there are fewer disturbances to the satellite compared with heavier and larger RF systems. The narrow beam divergence affords interference free and secure operation.
LASER Communication - shefi - 10-04-2017
[attachment=2502]
Free Space Laser Communications
Introduction
Free space laser communications
a.k.a. Free Space Optics, Optical
Presented By
Phillip Dykstra
WareOnEarth Communications Inc.
Wireless
Basically a laser and a telescope
Most are protocol independent
Typical range < 4 km (.5, 1, 2, 4,
8km)
Typical bandwidths: 10, 100, 1000
Mbps
Lucent 10 Gbps DWDM (TeraBeam)
Transmitters
LED (single or multiple)
1 mW typical
Laser (single or multiple)
10-20 mW typical, up to 100 mW
Usually 785 or 850 nm, some 1310
nm
Eye safety limit: 1.5 mW/cm^2 at
785 nm
Multiple transmitters boost power,
may also reduce scintillation fades
Detectors
PIN Diodes
-43 dBm typical
Avalanche Photo Diodes (APD)
-53 dBm typical (also greater dynamic
range)
Single or multiple detectors
Larger aperture increases receive
power, reduces scintillation fades
Design goal: BER < 10^-9 typical
LASER Communication - swarupraj - 10-04-2017
to get information about the topic laser communication full report ,ppt and related topic refer the page link bellow
http://seminarsprojects.net/Thread-laser-communication-systems--6013
http://seminarsprojects.net/Thread-laser-communication-systems
http://seminarsprojects.net/Thread-free-space-laser-communications--727
http://seminarsprojects.net/Thread-laser-based-communication-link
http://seminarsprojects.net/Thread-laser-communication
http://seminarsprojects.net/Thread-space-laser-communications-systems-technologies-and-applications
http://seminarsprojects.net/Thread-laser-communication-systems--6013?page=2
http://seminarsprojects.net/Thread-free-space-laser-communications--2019
LASER Communication - pratz - 10-04-2017
to get information about the topic "space laser communications" full report ppt and related topic refer the page link bellow
http://seminarsprojects.net/Thread-space-laser-communications
http://seminarsprojects.net/Thread-free-space-laser-communications--2019
http://seminarsprojects.net/Thread-free-space-laser-communications--727?pid=50653&mode=threaded
http://seminarsprojects.net/Thread-space-laser-communications-systems-technologies-and-applications?pid=47053&mode=threaded
LASER Communication - Shweta - 10-04-2017
to get information about the topic"Laser communication systems"refer the page link bellow
http://seminarsprojects.net/Thread-laser-communication-systems--6013
http://seminarsprojects.net/Thread-laser-communication-systems--6013?pid=60143#pid60143
LASER Communication - gourav7piso - 10-04-2017
hello,
i m anisha. i would like to get more details abt the topic "Laser communication" which would be helpful for my seminar too.
could u plz send me the details. my email id is [email protected].
Regards,
Anisha
LASER Communication - mangesh_pise - 10-04-2017
please make a look on these page for more about LASER Communication http://seminarsprojects.net/Thread-laser-communication-systems--6013 i am sure you never miss a second for reading this report
LASER Communication - swati swagatika sahu - 10-04-2017
please go through the following thread for more details on Laser communication
http://seminarsprojects.net/Thread-laser-communication-systems--6013
LASER Communication - pankaj narkhede - 10-04-2017
please go through the following thread for more details on 'LASER COMMUNICATION'.
http://seminarsprojects.net/Thread-laser-communication
LASER Communication - Er.Ritesh - 10-04-2017
plese send me whole detail of laser communication and plese send it power point presentation slides.[/size]