4.6 Article

Low-noise 750 MHz spaced ytterbium fiber frequency combs

Journal

OPTICS LETTERS
Volume 43, Issue 17, Pages 4136-4139

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OL.43.004136

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Funding

  1. Exploratory Research for Advanced Technology (ERATO), Japanese Science and Technology Agency (MINOSHIMA Intelligent Optical Synthesizer Project) [JPMJER1304]
  2. National Natural Science Foundation of China (NSFC) [61575004, 61735001]

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We demonstrate two low-noise 750 MHz ytterbium fiber frequency combs that are independently stabilized to a continuous-wave laser. A bulk electro-optic modulator and a single-stack piezo-electric transducer are employed as fast actuators for stabilizing the respective cavity length to heterodyne beat notes. Both combs exhibit in-loop fractional frequency instabilities of similar to 10(-18) at 1 s. To the best of our knowledge, this is the first demonstration of tightly phase-locked (<1 rad root mean square phase noise integrated from 0.1 Hz to 10 MHz) fiber frequency combs with 750 MHz fundamental repetition rate. (C) 2018 Optical Society of America

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