学术预告:Basics and applications of optical frequency combs

报告题目:Basics and applications of optical frequency combs

报告人:Dr. Mamoru Endo,University of Colorado

邀请人:赵智刚 教授

时间地点:2019年3月24日上午9:30

青岛校区振声苑W204

摘要:The optical spectrum of a femtosecond mode-locked laser
exhibits a comb-like structure, that is, the longitudinal modes are
evenly spaced by a separation equal to the pulse repetition rate. The
optical frequencies of such modes can be phase locked to radio frequency
or optical frequency standards. These frequency-controlled mode-locked
lasers are referred to as optical frequency combs . OFCs have become
invaluable tools in high-precision applications, including optical
clocks, or metrology and spectroscopy [1,2].

OFCs have been developed in 1990’s, and at that time, OFCs were
sophisticated laser sources, which could be used only in laboratories.
However, recent progress of laser technology enables to develop compact
and robust OFCs, and several commercial OFCs are available in the laser
market. Thanks to it, OFCs have become to be used not only for pure
scientific experiments but also for biological, medical or industrial
applications [3]. In this presentation, not only the basics of OFCs
but also several applications mentioned above will be presented.

个人简历:Mamoru Endo was born in Kanagawa, Japan, in 1987. He
received the B.S, M.S and Ph.D. degrees in applied physics from the
University of Tokyo, Tokyo, Japan, in 2011, 2013, and 2016 respectively.
In 2016, he joined the Institute for Solid State Physics , Kashiwa, as a
Postdoctoral Associate, where he worked on high-repetition rate optical
frequency comb and high-resolution spectroscopy. After that, he joined
Department of Physics, University of Colorado, Boulder as a Research
Associate, where he currently works on ultra-low noise optical frequency
combs and microwave generation.

Dr. Endo is a member of the Optical Society of America and the Japan
Society of Applied Physics .

References:

  1. B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M.
    Bishof, X. Zhang, W. Zhang, S. L. Bromley, and J. Ye, “An optical
    lattice clock with accuracy and stability at the 10-18 level,” Nature
    506, 71–75 .

  2. A. Ozawa, J. Davila-Rodriguez, J. R. Bounds, H. A. Schuessler, T. W.
    Hänsch, and T. Udem, “Single ion fluorescence excited with a single mode
    of an UV frequency comb,” Nature Communications 8, 44 .

  3. K. C. Cossel, E. M. Waxman, F. R. Giorgetta, M. Cermak, I. R.
    Coddington, D. Hesselius, S. Ruben, W. C. Swann, G.-W. Truong, G. B.
    Rieker, and N. R. Newbury, “Open-path dual-comb spectroscopy to an
    airborne retroreflector,” Optica 4, 724–5 .

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