Enhanced Two-Photon Absorption in a Hollow-Core Photonic Bandgap Fiber
arXiv:1011.0349 · doi:10.1103/PhysRevA.83.033833
Abstract
We show that two-photon absorption (TPA) in Rubidium atoms can be greatly enhanced by the use of a hollow-core photonic bandgap fiber. We investigate off-resonant, degenerate Doppler-free TPA on the 5S1/2 - 5D5/2 transition and observe 1% absorption of a pump beam with a total power of only 1 mW in the fiber. These results are verified by measuring the amount of emitted blue fluorescence and are consistent with the theoretical predictions which indicate that transit time effects play an important role in determining the two-photon absorption cross-section in a confined geometry.
5 pages, 6 figures
References in corpus (4)
- 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
- All-Optical Switching Using the Quantum Zeno Effect and Two-Photon Absorption
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- Transmission degradation and preservation for tapered optical fibers in rubidium vapor
- Ultralow-power nonlinear optics using tapered optical fibers in metastable xenon
- A nanowaveguide platform for collective atom-light interaction
- Laser-cooled caesium atoms confined with magic-wavelength dipole inside a hollow-core photonic-bandgap fiber
- Continuous generation of Rubidium vapor in hollow-core photonic band-gap fibers