[time-nuts] Microsemi up for sale?

Gerhard Hoffmann dk4xp at arcor.de
Sun Mar 4 00:45:28 EST 2018



Am 04.03.2018 um 04:04 schrieb Richard (Rick) Karlquist:
> When I was working on fiber optic communication test,
> I remember hearing about lasers that were "tuned" with
> variable Peltier coolers.  Power consumption is critical in
> a cesium standard that can run on batteries.  Maybe
> the power consumption of the coolers is a deal breaker.
I have seen that stunt at SHF Design in Berlin, don't dare to
calculate how long ago..

There were 2 lasers mixed with a 60 GHz beat frequency.
Playing with one of the Peltiers moved that to 50 GHz.
Easy to see the carrier creep on the spectrum analyzer.

Cheers, Gerhard





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