Saturation of atomic transitions using sub-wavelength diameter tapered optical fibers in rubidium vapor

Abstract

We experimentally investigate ultralow-power saturation of the rubidium D2 transitions using a tapered optical fiber (TOF) suspended in a warm Rb vapor. A direct comparison of power-dependent absorption measurements for the TOF system with those obtained in a standard free-space vapor cell system highlights the differences in saturation behavior for the two systems. The effects of hyperfine pumping in the TOF system are found to be minimized due to the short atomic transit times through the highly confined evanescent optical mode guided by the TOF. The TOF system data is well-fit by a relatively simple empirical absorption model that indicates nanoWatt-level saturation powers.

arXiv comment6 pages, 6 figures

References in corpus (8)

• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• Low-Light-Level Optical Interactions with Rubidium Vapor in a Photonic Bandgap Fiber
• Observation of two-photon absorption at low power levels using tapered optical fibers in rubidium vapor
• Efficient optical pumping and high optical depth in a hollow-core photonic-crystal fibre for a broadband quantum memory
• Analysis of Enhanced Two-Photon Absorption in Tapered Optical Fibers
• Transmission degradation and preservation for tapered optical fibers in rubidium vapor
• Ultralow-power nonlinear optics using tapered optical fibers in metastable xenon
• Observation of Zeeman shift in the rubidium D2 line using an optical nanofiber in vapor

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