[time-nuts] OT: transfer of 3 GHz via fiber optic

Dr Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon Feb 19 23:35:01 EST 2007


Didier Juges wrote:
> This is somewhat off topic, but still a matter of precision timing.
>
> A friend of mine wants to send a 3 GHz LO signal up a fiber optic cable.
>
> I know there have been threads dealing with transmission of precise 
> timing signals over fiber optics, and I hope I can get some suggestions 
> where to look for more info.
>
> I have found lots of links to high data rate laser transceivers, but 
> while they all tout the high data rate, there is little specified about 
> delay, and jitter is not very good, so it seems as a minimum he would 
> need a clean-up PLL at the receive end. My initial recommendation was to 
> send a precise 10 MHz (where did that come from?) via coax and have a 
> synthesizer at the receive end, but he is trying to minimize the amount 
> of hardware there.
>
> Thanks in advance,
>
> Didier KO4BB
>
>
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>   
Didier

YAR (Yet Another Reference)
http://www.cv.nrao.edu/~avaccari/tuceng/photonics/documentation/presentations/data/mwp99.pdf 
<http://www.cv.nrao.edu/%7Eavaccari/tuceng/photonics/documentation/presentations/data/mwp99.pdf>

Bruce



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