منابع مشابه
All-optical switching in rubidium vapor.
We report on an all-optical switch that operates at low light levels. It consists of laser beams counterpropagating through a warm rubidium vapor that induce an off-axis optical pattern. A switching laser beam causes this pattern to rotate even when the power in the switching beam is much lower than the power in the pattern. The observed switching energy density is very low, suggesting that the...
متن کاملAll optical waveguiding in a coherent atomic rubidium vapor.
We demonstrate an all optical waveguide imprinted by a low power Laguerre Gaussian control laser beam using a coherent Raman process in warm atomic rubidium vapor. We show that the signal beam propagates with a small spot size over several diffraction lengths. We also show that the coupling efficiency of the signal beam into the waveguide varies linearly with the signal power.
متن کاملOptical Pumping of Rubidium Vapor Atoms
The Zeeman splittings of the hyperfine structure of rubidium as well as the ambient geomagnetic field are investigated by using an optical pumping apparatus. The frequencies of Zeeman transitions are proportional to the magnetic field applied; using this, the ambient geomagnetic field is found to be B = ((37.755±0.025)ex+(5.5179±0.0030)ey +(19.15±0.06st±0.67sy)ez) ·10−6 T, compared to an accept...
متن کاملAll-optical switching with transverse optical patterns
We demonstrate an all-optical switch that operates at ultra-low-light levels and exhibits several features necessary for use in optical switching networks. An input switching beam, wavelength , with an energy density of 10−2 photons per optical cross section = 2 / 2 changes the orientation of a two-spot pattern generated via parametric instability in warm rubidium vapor. The instability is indu...
متن کاملSingle-photon all-optical switching
This paper investigates an analytical model of a system consisting of a photonic crystal waveguide, a microcavity, and a four-level electromagnetically-induced transparency atom. The transmission and reflection of the system are numerically calculated, and it shown that classical results for this class of systems can be extended to the quantum regime. In particular, these systems could enable u...
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ژورنال
عنوان ژورنال: Science
سال: 2005
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.1110151