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

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

2010-07-12

arxiv.org/abs/1007.1941v1

Phys. Rev. Lett. 105, 173602 (2010)

Physics

Quantum Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.105.173602

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.

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