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Full-Text Articles in Physics
Doppler-Free Saturated Fluorescence Spectroscopy Of Lithium Using A Stabilized Frequency Comb, Michael E. Rowan
Doppler-Free Saturated Fluorescence Spectroscopy Of Lithium Using A Stabilized Frequency Comb, Michael E. Rowan
Honors Papers
The lineshapes of the D1 (22S1/2 → 22P1/2 ) and D2 (22S3/2 → 22P1/2) transitions in lithium were measured using a diode laser that was frequency-stabilized to a Ti:Sapphire 1 GHz optical frequency comb. The excitation was achieved by retroreflecting the diode laser, in effect producing the Doppler-free profiles for the center frequencies of transitions. The observed spectra were compared to density matrix calculations to gain insight into systematic effects including the dependence of Doppler-free profiles on power and polarization angle of the diode. For certain transitions, the method of saturated fluorescence spectroscopy inevitably leads to the presence of extra …
Two-Photon Direct Frequency Comb Spectroscopy Of Rubidium, Sophia Lee Chen
Two-Photon Direct Frequency Comb Spectroscopy Of Rubidium, Sophia Lee Chen
Honors Papers
Precision spectroscopy measurements have contributed significantly to our understanding of the fundamental structure of atoms. Here we present an experiment involving a new precision spectroscopic technique using a femtosecond optical frequency comb to excite two-photon transitions in rubidium. A femtosecond optical frequency comb is an ultrashort, pulsed laser with tens of thousands of frequencies, equally spaced in frequency-space. These frequencies can be used to excite atoms to specific transitions. The frequency comb is a versatile instrument that can avoid many of the experimental uncertainties that are associated with other spectroscopic techniques. The specific technique we use is called velocity selective …