Long-Sheng+Ma

//** 1 **** Bureau International des Poids et Mesures, Pavillon de Breteuil, 92312 Sevres, FRANCE **// //** 2 **** Key Laboratory of Optical and Magnetic Resonance Spectroscopy, East China Normal University, Shanghai 200062, CHINA **// //** 3 **** National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA. **// //** 4 **** OFS Laboratories, 700 Mountain Avenue, Murray Hill, New Jersey 07974, USA **// Optically referenced femtosecond laser frequency comb can generate optical field precisely in both time and frequency domain. We will present results illustrating the achievable levels of control of the optical pulse train emitted by a mode-locked laser. By rigorously comparing four Kerr-lens mode-locked Ti:sapphire lasers from three laboratories, we find that the relative frequency reproducibility of the optical comb mode frequency and the associated ~1 GHz optical pulse train can be 1 × 10-19 and 2 × 10-18, respectively, with confidence levels of 95%.
 * Precision Control of Optical Pulse Trains **
 * Long-Sheng Ma2,1, Zhiyi Bi2, Albrecht Bartels3, Kyoungsik Kim3 **
 * Lennart Robertsson1, Massimo Zucco1, Robert S. Windeler4 **
 * Guido Wilpers3, Chris Oates3, Leo Hollberg3, Scott A. Diddams3 **