Besides serving as a frequency counter or clockwork, an optical frequency comb can be used directly for spectroscopy, thus the name Direct Frequency Comb Spectroscopy (DFCS). Precise phase coherence among successive ultrashort pulses allow one to explore both fast dynamics in the time domain and high-resolution structural information in the frequency domain. Coherent accumulation of weak pulses can lead to strong field effects. Combined with spectral manipulation, high-resolution quantum control can be implemented. The large number of frequency comb components also provide a massive set of parallel detection channels to gather spectroscopic information. In this chapter we provide a detailed review of some of the current applications that exploit these unique features, and discuss several future directions of DFCS.
|Title of host publication||Advances in Atomic, Molecular and Optical Physics|
|Editors||Ennio Arimondo, Paul Berman, Chun Lin|
|Number of pages||60|
|State||Published - 2008|
|Name||Advances in Atomic, Molecular and Optical Physics|
Bibliographical noteFunding Information:
We sincerely thank many of our colleagues and coworkers who have made critical contributions to the work reported in this review. In particular, R.J. Jones led the initial effort and, along with K.D. Moll, T.R. Schibli, D. Yost, and D. Hudson, carried out a large portion of the femtosecond enhancement cavity work. A. Marian, D. Felinto, and J. Lawall are important contributors to the initial development of broadband DFCS work. A. Bartels, T. Fortier, L. Hollberg, Y. Le Coq, V. Mbele, C. Oates, D. Ortega, and C. Tanner are acknowledged for their invaluable contributions to the Ca and Cs spectroscopy, and the VIPA-based spectrometer. We benefited from useful discussions with E. Eyler, J.L. Hall, S.T. Cundiff, F. Cruz and A. Weiner. Low-loss, low-dispersion, and wide-bandwidth mirrors are provided by R. Lalezari of Advanced Thin Films. We also thank A. Fernandez, A. Apolonski, F. Krausz, I. Hartl, and M. Fermann for providing high energy femtosecond oscillators. Finally, we gratefully acknowledge funding support from NIST, AFOSR, ONR, NSF, and NASA. A. Pe'er thanks the Fulbright foundation for financial support. J.E. Stalnaker gratefully acknowledges the support of the National Research Council. Finally, we thank T. Schibli and T. Fortier for their many useful comments on the manuscript.