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Publication Citation: Ultralow phase noise microwave generation with an Er:fiber-based optical frequency divider

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Author(s): Franklyn J. Quinlan; Tara M. Fortier; Matthew S. Kirchner; Jennifer A. Taylor; Michael J. Thorpe; Nathan D. Lemke; Andrew D. Ludlow; Yanyi Jiang; Christopher W. Oates; Scott A. Diddams;
Title: Ultralow phase noise microwave generation with an Er:fiber-based optical frequency divider
Published: August 15, 2011
Abstract: 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.
Citation: Optics Letters
Volume: 36
Issue: 16
Pages: pp. 3260 - 3262
Keywords: fiber lasers;microwave photonics;optical frequency comb;phase noise
Research Areas: Physics