Physics – Quantum Physics
Scientific paper
2010-07-12
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.
Franson James D.
Hendrickson S. M.
Lai M. M.
Pittman Todd B.
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