Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wide-Dynamic-Range Cantilever Magnetometry Using a Fiber-Optic
  Interferometer and its Application to High-frequency Electron Spin Resonance
  Spectroscopy   We present a method of broadening the dynamic range of optical
interferometric detection of cantilever displacement. The key idea of this
system is to use a wavelength-tunable laser source. The wavelength is subject
to proportional-integral control, which is used to keep the cavity detuning
constant during a measurement. Under this control, the change in wavelength is
proportional to the cantilever displacement. Using this technique, we can
measure large displacements ($>1\ \mathrm{\mu m}$) without degradation of
sensitivity. We apply this technique to high-frequency electron spin resonance
spectroscopy and succeed in removing an irregular background signal that arises
from the constantly varying sensitivity of the interferometer.

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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
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The categories of this paper are: eess