Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wavefront shaping for optimized many-mode Kerr beam self-cleaning in
  graded-index multimode fiber   We report experimental results, showing that the Kerr beam self-cleaning of
many low-order modes in a graded-index multimode fiber can be controlled thanks
to optimized wavefront shaping of the coherent excitation beam. Adaptive
profiling of the transverse input phase was utilized for channeling the
launched power towards a specific low-order fiber mode, by exploiting nonlinear
coupling among all guided modes. Experiments were carried out with 7 ps pulses
at 1064 nm injected in a five meters long multimode fiber operating in the
normal dispersion regime. Optimized Kerr beam self-cleaning of five different
LP modes is reported, with a power threshold that increases with the mode
order.

27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom