We present two-photon spectroscopy of a thermal rubidium vapor confined to the hollow core of a photonic-crystal fiber. Linewidths as narrow as 10 MHz were observed on the 5S1/2→5D5/2 transition enabling the hyperfine splitting of the excited state to be resolved. Very strong nonlinear absorption (>90%) was observed, with substantial absorption maintained over large detunings (9 GHz) from an intermediate state. These attributes make this system ideal for many frequency metrology and quantum optics applications. © 2013 American Physical Society.
CITATION STYLE
Perrella, C., Light, P. S., Anstie, J. D., Stace, T. M., Benabid, F., & Luiten, A. N. (2013). High-resolution two-photon spectroscopy of rubidium within a confined geometry. Physical Review A - Atomic, Molecular, and Optical Physics, 87(1). https://doi.org/10.1103/PhysRevA.87.013818
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