Observation of two-photon absorption at low power levels using tapered optical fibers in rubidium vapor

Abstract

Nonlinear optical effects can be enhanced in tapered optical fibers with diameters less than the wavelength of the propagating light. Here we report on the observation of two-photon absorption using tapered fibers in rubidium vapor at power levels of less than 150 nW. Transit-time broadening produces two-photon absorption spectra with sharp peaks that are very different from conventional line shapes.

4 pages, 6 figures

References in corpus (5)

• All-optical switching in rubidium vapor
• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• Zeno logic gates using micro-cavities
• Analysis of Enhanced Two-Photon Absorption in Tapered Optical Fibers
• Single Photon Source Using Laser Pulses and Two-Photon Absorption

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