Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Demonstration of Fully Nonlinear Spectrum Modulated System in the Highly
  Nonlinear Optical Transmission Regime   We report a 3 dB increase in the nonlinear threshold of a 64*0.5Gbaud 16-QAM
continuous-nonlinear-spectrum modulated signal by nonlinear multiplexing with
QPSK modulated multi-solitons, showing the first ever fully nonlinear-spectrum
modulated system in the highly nonlinear regime.

35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph