Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amplification of arbitrary frequency chirps of pulsed light on
  nanosecond timescales   We have developed a system for producing amplified pulses of
frequency-chirped light at 780 nm on nanosecond timescales. The system starts
with tunable cw laser light and employs a pair of fiber-based phase modulators,
a semiconductor optical amplifier, and a tapered amplifier to achieve chirp
rates exceeding 3 GHz/10 ns and peak powers greater than 1 W. Driving the
modulators with an arbitrary waveform generator enables arbitrary chirp shapes,
such as two-frequency linear chirps. We overcome the optical power limitations
of the modulators by duty cycling and avoid unseeded operation of the tapered
amplifier by multiplexing the chirped pulses with "dummy" light from a separate
diode laser.

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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn