期刊
PHYSICAL REVIEW A
卷 80, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.053806
关键词
frequency standards; infrared spectra; microwave photonics; optical saturable absorption; rubidium; sapphire; spectral line breadth; titanium; visible spectra
The high power per mode of a recently developed 10 GHz femtosecond Ti:sapphire frequency comb permits nonlinear Doppler-free saturation spectroscopy in Rb-87 with a single mode of the comb. We use this access to the natural linewidth of the rubidium D-2 line to effectively stabilize the optical frequencies of the comb with an instability of 7x10(-12) in 1 s of averaging. The repetition rate is stabilized to a microwave reference leading to a stabilized and atomically referenced comb. The frequency stability of the 10 GHz comb is characterized using optical heterodyne with an independent self-referenced 1 GHz comb. In addition, we present alternative stabilization approaches for high repetition rate frequency combs and evaluate their expected stabilities.
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