Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transmission degradation and preservation for tapered optical fibers in
  rubidium vapor   The use of sub-wavelength diameter tapered optical fibers (TOF's) in warm
rubidium vapor has recently been identified as a promising system for realizing
ultra-low-power nonlinear optical effects. However, at the relatively high
atomic densities needed for many of these experiments, rubidium atoms
accumulating on the TOF surface can cause a significant loss of overall
transmission through the fiber. Here we report direct measurements of the
time-scale associated with this transmission degradation for various rubidium
density conditions. Transmission is affected almost immediately after the
introduction of rubidium vapor into the system, and declines rapidly as the
density is increased. More significantly, we show how a heating element
designed to raise the TOF temperature can be used to reduce this transmission
loss and dramatically extend the effective TOF transmission lifetime.

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The categories of this paper are: math
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th