Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrahigh-speed optical coherence tomography based on a 100 MHz and 100
  nm swept source   We demonstrate an ultrahigh-speed optical coherence tomography (OCT) based on
a 100 MHz swept source (SS). An all polarization-maintaining figure-9
mode-locked fiber laser is used as the seed laser. After nonlinear spectral
expansion in an Erbium-doped fiber amplifier, a flat top spectrum with
respectively 1-dB and 10-dB bandwidths of 73.7 nm and 106 nm is obtained. The
broadband femtosecond pulse is time stretched to a swept signal in a section of
dispersion compensation fiber with a total dispersion of -84 ps/nm. With the
swept source, the axial resolution of the SS-OCT is measured to be 21 um with a
6 dB sensitivity roll-off length of 3 mm. A tomographic image of an encoding
disk and a hard disk jointly rotating at 17,000 rpm was acquired by using the
SS-OCT with a high imaging quality.

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The categories of this paper are: cs
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat