[time-nuts] Current state of optical clocks and the definition of the second

Neville Michie namichie at gmail.com
Tue Jan 13 15:00:09 EST 2015

THe stability /accuracy of lasers is entirely dependent on the cavity length.
Materials used are usually invar or silica, so you are no better off than 
with a quartz crystals.
They are just a resonant cavity.
Neville Michie

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