Optical SETI Map Conferences Map Illustrations Map Photo Galleries Map Observations Map Constructing Map
Search Engines Contents Complete Site Map Tech. Support Map Order Equip. Map OSETI Network

Search WWW Search www.coseti.org Search www.oseti.net Search www.photonstar.org Search www.opticalseti.org

colorbar.gif (4491 bytes)


1 kW (SETI) Signals At 10 Light Years



This graph shows the CNRs normalized to a modest 1 kW transmitter for microwave and optical beacons at a range of 10 L. Y. (16640 bytes)


This graph shows the relative efficacy of the three types of cw beacons at a range of 10 light years.  At this range, thermal kT noise or quantum noise dominates and the planckian background noise is insignificant.

Clearly, this comparative analysis for diffraction-limited performance of each type of link, shows that on an equal transmitter power basis, the visible optical link is superior to the microwave, despite what has been previously suggested in most of the SETI literature.

Compare this graph to 9301-027.

For more information see 9008-002.


The Columbus Optical SETI Observatory
Copyright (c), 1990

Home Glossary
SPIE's OSETI I Conference SPIE's OSETI II Conference
SPIE's OSETI III Conference
The Columbus Optical SETI Observatory
Copyright , 1990-2006 Personal Web Site:
Last modified:  10/28/06
Contact Info