Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum-limited measurements of intensity noise levels in Yb-doped fiber
  amplifiers   We investigate the frequency-resolved intensity noise spectrum of an Yb-doped
fiber amplifier down to the fundamental limit of quantum noise. We focus on the
kHz and low MHz frequency regime with special interest in the region between 1
and 10 kHz. Intensity noise levels up to >60 dB above the shot noise limit are
found, revealing great optimization potential. Additionally, two seed lasers
with different noise characteristics were amplified, showing that the seed
source has a significant impact and should be considered in the design of high
power fiber amplifiers.

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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th