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Advances in Optical Sciences Congress

Ultralow-power nonlinear optics with Rb-filled photonic band-gap fibers

Vivek Venkataraman, Amar R. Bhagwat, Pablo Londero, Aaron D. Slepkov, Alexander L. Gaeta

Published Jan 1, 2009• 0 citations
Publisher

Abstract

Using light-induced atomic desorption, we generate an optically-dense Rb vapor on- demand inside a hollow-core photonic bandgap fiber for ultralow power nonlinear optical interactions. We demonstrate electromagnetically-induced-transparency, four-wave-mixing and efficient all-optical modulation in this system.
DOI
10.1364/nlo.2009.nwb4

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Recent demonstrations of light-matter interactions with atoms and molecules confined to hollow waveguides offer great promise for ultralow-light-level applications. The use of waveguides allows for tight optical confinement over interaction lengths much greater than what could be achieved in bulk geometries. However, the combination of strong atom-photon interactions and nonuniformity of guided light modes gives rise to spectroscopic features that must be understood in order to take full advantage of the properties of such systems. We use light-induced atomic desorption to generate an optically dense Rb vapor at room temperature inside a hollow-core photonic band-gap fiber. Saturable-absorption spectroscopy and passive slow-light experiments reveal large ac Stark shifts, power broadening, and transit-time broadening, that are present in this system even at nanowatt powers.