Kilohertz-Resolution Spectroscopy of Cold Atoms with an Optical Frequency Comb

Journal Article · Fri Oct 20 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.163905· OSTI ID:20861020

Fortier, T M ^[1]; Le Coq, Y; Stalnaker, J E; Diddams, S A; Oates, C W; Hollberg, L ^[2]; Ortega, D ^[3]

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1. Los Alamos National Laboratory, P-23 Physics Division MS H803, Los Alamos, New Mexico 87545 (United States)
2. National Institute of Standards and Technology, Time and Frequency Division, MS 847 Boulder, Colorado 80305 (United States)
3. Gleb Wataghin Physics Institute, State University of Campinas (UNICAMP), C.P. 6165, Campinas, SP 13083-970 (Brazil)

We have performed sub-Doppler spectroscopy on the narrow intercombination line of cold calcium atoms using the amplified output of a femtosecond laser frequency comb. Injection locking of a 657-nm diode laser with a femtosecond comb allows for two regimes of amplification, one in which many lines of the comb are amplified, and one where a single line is predominantly amplified. The output of the laser in both regimes was used to perform kilohertz-level spectroscopy. This experiment demonstrates the potential for high-resolution absolute-frequency spectroscopy over the entire spectrum of the frequency comb output using a single high-finesse optical reference cavity.

• OSTI ID: 20861020
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
ATOMS
CALCIUM
LASERS
RESOLUTION
SPECTROSCOPY