Femtosecond laser-based synthesis of ultrastable microwave signals from optical frequency references
A Bartels, Scott Diddams, Christopher W. Oates, G Wilpers, James C. Bergquist, Windell Oskay, Leo W. Hollberg
Using femtosecond laser frequency combs to convert optical frequency references to the microwave domain, we demonstrate the synthesis of 10 GHz signals having an instability of <3.5e-15 at 1 s averaging time, limited by the optical reference. The residual instability and phase noise of the femtosecond laser based frequency synthesizers are 6.5e-16 at 1 s and -98 dBc/Hz at 1 Hz from the 10 GHz carrier. The timing jitter of the microwave signals relative to the optical reference is 3.3 fs in an integration window from 0.1 Hz to 1 MHz.
, Diddams, S.
, Oates, C.
, Wilpers, G.
, Bergquist, J.
, Oskay, W.
and Hollberg, L.
Femtosecond laser-based synthesis of ultrastable microwave signals from optical frequency references, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50160
(Accessed December 1, 2023)