We show 40% all-optical modulation with 1 nW total power via non-degenerate two-photon absorption in Rb vapor confined to a photonic bandgap fiber. This corresponds to 12 photons of switching energy.
© 2011 OSA
K. Saha, V. Venkataraman, P. Londero, and A. L. Gaeta, "Few-Photon Switching via Two-Photon Absorption in Rb-Filled Photonic Bandgap Fibers," in CLEO:2011 - Laser Applications to Photonic Applications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper CMJ2.
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