Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strictly all-fiber picosecond Ytterbium fiber laser utilizing
  chirped-fiber-Bragg-gratings for dispersion control   A compact, strictly all-fiber, picosecond pulse source based on ytterbium
(Yb) doped fiber is described. Stable solitary mode-locking is obtained in a
fiber-oscillator utilizing a carefully designed chirped fiber-Bragg-grating
(C-FBG) for both dispersion control and spectral filtering. Self-starting is
assured through the use of a fiber-coupled
semiconductor-saturable-absorber-mirror (SESAM). The oscillator's 50MHz 3.8ps
pulse-train output at 1064nm wavelength is amplified to 1.2W average power by
an Yb doped fiber-amplifier, yielding 6.45ps parabolic pulses. Numerical
simulations of the fiber oscillator design based on the modified nonlinear
Schrodinger equation (NLSE), agree well with the experimental results.

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The categories of this paper are: math
19
The categories of this paper are: eess
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The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
18
The categories of this paper are: econ
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The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex