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From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: sci.electronics.design
Subject: Re: OT: Atomic nucleus excited with laser: a breakthrough after decades
Date: Wed, 08 May 2024 17:57:05 -0400
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On Wed, 8 May 2024 14:45:42 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

[snip]

>The cleverest part of the Hall-Haensch comb generator is that you can lock
>the blue end of the comb to the second harmonic of the red end, one tooth
>off, and lock the difference to a good reference. Then all the teeth have
>the same phase noise as the reference oscillator, rather than 20 log(600
>THz /  100 MHz) ~ 138 dB worse, as it would be in a multiplier.  

Hmm.  It had to be true, but I never connected the dots there.  What
is mechanism by which this is achieved?  References?

Thanks,

Joe Gwinn