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High resolution spectroscopy with a femtosecond laser frequency comb Vladislav Gerginov 1 Scott Diddams 2 , Albrecht Bartels 3 , Carol E. Tanner 1 and Leo Hollberg 2 1 Department of physics, University of Notre Dame, Notre Dame, IN 46556
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High resolution spectroscopy with a femtosecond laser frequency comb
Scott Diddams2, Albrecht Bartels3, Carol E. Tanner1 and Leo Hollberg2
1Department of physics, University of Notre Dame, Notre Dame, IN 46556
2National Institute of Standards and Technology, 325 Broadway M.S. 847, Boulder, CO 80305
3Gigaoptics GmbH (see exhibit)
1970s: Ideas of 2-photon spectroscopy with pulsed sources from T. W. Hänsch and
V. P. Chebotaev;
“Narrow resonances of two-photon absorption of super-narrow pulses in a gas”
Y. V. Baklanov and V. P. Chebotaev, Appl. Phys. 12, 97 (1977).
“Coherent Two-Photon Excitation by Multiple Light Pulses”R. Teets, J. Eckstein, and T. W. HänschPhys. Rev. Lett. 38, 760-764 (1977).
“Two-photon spectroscopy of laser-cooled Rb using a mode-locked laser”,
M. J. Snadden, A. S. Bell, E. Riis, A. I. Ferguson,
Opt. Commun, 125, 70-76, (1996).
“High sensitivity phase spectroscopy with picosecond resolution”
J. –C. Diels, B. Atherton, S. Diddams;Proceedings of 5th European Quantum Electronics Conference, 29 195–195, (1994).
“United Time-Frequency Spectroscopy for Dynamics and Global Structure”,
A. Marian, M. C. Stowe, J. R. Lawall, D. Felinto, J. Ye, Science Express, 1105660, 2004.
using a femtosecond laser
Bartels et al., Opt. Lett. 27(20) 1839, 2002
Bartels et al., Opt. Lett. 29,10,1081,2004
FLFC output spectrum
Optical frequency measurements
D2 line @ 1.5 nW power
1V. Gerginov, K. Calkins, C. E. Tanner, A. Bartels,
J. McFerran, S. Diddams, L. Hollberg, in preparation
1V. Gerginov, C. E. Tanner, S. Diddams, A. Bartels, L. Hollberg, PRA 70, 042505, 2004
Cs D2 line optical clock
Optical frequency measurements using a single comb component;
A stable array of optical and microwave frequencies;
Potential for femtosecond-laser based optical clocks;
Typical optical frequency reference uncertainties:
This system: 60kHz @ 852nm (1.7×10-10)
I2 stabilized He-Ne laser: 12 kHz @ 633 nm (2.5×10-11)
I2 stabilized SHG of Nd:YAG: 5 kHz @ 532 nm (9×10-12)
Rb 2-photon stabilized diode laser: 5 kHz @ 778nm (1.2×10-11)
GPS: <1kHz with 1-2 days of averaging