Effect of high-pressure buffer gas on alkali metals We discuss means to improve the system performance in section 6 and present our conclusions in section 7. In section 5, we present the experimental results, including spectral data and modulation data with and without buffer gas. The details of the experimental set-up and the spectral information corresponding to the 5S-5P-5D system are presented in section 4. In section 3, we present a detailed model for our system and show simulation results. In section 2, we briefly review the effects of buffer gas on alkali atoms. The rest of the paper is organized as follows. In combination with a tapered nano fiber (TNF) system, the system has the potential to be used for low-power high-speed all-optical switching. The principle of operation is the same for any cascade system with two intermediate fine structure levels, and thus can be used at a wavelength corresponding to the telecommunication band, for example. The choice of these particular transitions is primarily determined by the operational wavelength of the devices at our disposal. The process is aided by the presence of the 5P 1/2 level. In this paper, we present experimental results for such a modulator using the 5S 1/2-5P 3/2-5D 3/2 system, where the lower leg is at 780 nm and the upper leg is at ~776 nm. We also proposed a novel scheme for increasing the modulation bandwidth using buffer gas induced rapid fine structure mixing. We verified experimentally that the bandwidth for the modulator is limited by the decay rate (~6 MHz) of the intermediate level.
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