[time-nuts] OT: transfer of 3 GHz via fiber optic
Dr Bruce Griffiths
bruce.griffiths at xtra.co.nz
Wed Feb 21 01:50:13 UTC 2007
Didier Juges wrote:
> Bruce,
>
> I have read about this, noise performance also is not good for analog
> transmissions, causing very limited dynamic range.
>
> That's probably why they use either FM or digital coding in just about
> all applications.
>
> I just did not think the jitter would be so bad, even with a laser
> transmitter.
>
> In my case, we are just trying to send a reference signal, but it must
> be clean, so unless a clean-up PLL is used, forget about fiber.
>
> Thanks,
>
> Didier
> _______________________________________________
> time-nuts mailing list
> time-nuts at febo.com
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>
>
Didier
I presume you are directly modulating the laser.
This is hopeless you get chirping and all sorts of other effects that
are virtually impossible to tame.
An external electrooptic (LiNb03) modulator is the only way that
actually works and has a halfway decent performance.
Bruce
More information about the Time-nuts_lists.febo.com
mailing list