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首页> 美国政府科技报告 >Diffusion of Rubidium Vapor through Hollow-Core Fibers for Gas-Phased Fiber-Lasers
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Diffusion of Rubidium Vapor through Hollow-Core Fibers for Gas-Phased Fiber-Lasers

机译：氦蒸气通过空心纤维扩散用于气相光纤激光器

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This work examines the diffusion of rubidium through a small diameter tube alone and in the presence of noble gases. A fluid dynamics analysis is investigated to aid in choosing a method for transferring atomic rubidium vapor that is reliable and efficient. Solutions to the time dependant ordinary differential equation describing the experimental flow properties of the system reveal more precise outcomes than previously practiced routines. Resolved viscosities and Poiseuille flow theory velocity profile distributions are characterized for noble gas carriers of the rubidium vapor. Applying Reynolds Numbers to the flow experiments provides pressure differential boundaries that are employed in the successful rubidium vapor transfer process. Atomic spectroscopy is demonstrated through the use of a rubidium D1 resonate diode laser to record an absorption spectrum and extract alkali vapor densities that successfully propagated through a 12 cm long capillary tube with a 500;m inner diameter. Rubidium number densities on the order of 1.384 x 10(12) cm(-3), 4.615 x 10(11) cm(-3) and 9.890 x 10(9) cm(-3) were recorded for interaction path lengths of 0.05 cm, 0.15 cm and 7.0 cm, respectively. Number densities were achieved through the constant flow and diffusion of a helium/rubidium combination. Sustaining a constant pressure differential between 80 and 150 Torr across the capillary tube assisted in transferring the rubidium vapor through a small inner-diameter hollow-core tube.

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