Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Supermode-based second harmonic generation in a nonlinear interferometer   We demonstrate supermode-based second harmonic generation in an integrated
nonlinear interferometer made of linear and nonlinear directional couplers. We
use a fully-fibered pump shaper to demonstrate second harmonic generation
pumped by the symmetric or anti-symmetric fundamental spatial modes. The
selection of the pumping mode and thus of a specific SHG spectral profile is
achieved through the selection of the fundamental wavelength and via a robust
phase setting scheme. We use two methods: either post-selecting or actively
setting the pumping mode. Such a modal phase matching paves the way for
classical and quantum applications of coupled nonlinear photonic circuits,
where multimode excitation, encoding and detection are a route for multiplexing
and scaling up light-processing.

28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc