Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studying the operation of an all-PM Yb-doped fiber laser oscillator at
  negative and positive net cavity dispersion   Chirped fiber Bragg gratings in Yb-doped fiber lasers allow tuning the net
cavity dispersion, thus enabling access to pulse dynamics beyond the typical
all-normal-dispersion dissipative soliton regime. This Letter demonstrates an
ultrafast dispersion-managed all-polarization-maintaining fiber oscillator
mode-locked with a nonlinear optical loop mirror. Using a chirped fiber Bragg
grating inside the oscillator, it can work at net cavity dispersion in the
range from -0.098 ps$^2$ up to +0.067 ps$^2$ and above at the wavelength of 1
$\mathrm{\mu}$m. Depending on the configuration, the system can deliver stable
pulses with energies up to 2.3 nJ and pulse durations as short as 98 fs.

31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom