Journal
OPTICS LETTERS
Volume 36, Issue 16, Pages 3260-3262Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.003260
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- National Institute of Standards and Technology (NIST)
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We present an optical frequency divider based on a 200 MHz repetition rate Er: fiber mode-locked laser that, when locked to a stable optical frequency reference, generates microwave signals with absolute phase noise that is equal to or better than cryogenic microwave oscillators. At 1 Hz offset from a 10 GHz carrier, the phase noise is below -100 dBc/Hz, limited by the optical reference. For offset frequencies >10 kHz, the phase noise is shot noise limited at -145 dBc/Hz. An analysis of the contribution of the residual noise from the Er: fiber optical frequency divider is also presented.
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