> Has anybody experienced with free-space optical gigabit Ethernet > links? I am curious about whether the transceivers have a fixed > latency or at least a latency one can easily quantify online. This is > the trickiest part for adding WR support on top of a given physical > layer.
Hi Javier, When searching this topic I ran across a commercial laser solution: http://www.laseroptronics.com/products.cfm/product/27-0-0.htm http://www.laseroptronics.com/index.cfm/id/57-66.htm http://www.laseroptronics.com/index.cfm/id/57-69.htm etc. But, according to /57-67.htm it "starts" at $15k per node. Plus there's the cost of all the WR pieces, assuming the two are even compatible. So this is vastly above the ~$2k budget mentioned by OP. I also assume OP is not ready to embark on a one-off, multi-man-year R&D project. This particular issue -- how to synchronize (or, at least phase compare) multiple oscillators by a two-way laser link over a few km to within 500 ps -- is really quite interesting. It would, for example, allow me to do live monitoring of 5071A Cs time dilation on my next mountain-valley relativity experiment. /tvb _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.