Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Achromatic photonic tricouplers for application in nulling
  interferometry   Integrated-optic components are being increasingly used in astrophysics,
mainly where accuracy and precision are paramount. One such emerging technology
is nulling interferometry that targets high contrast and high angular
resolution. Two of the most critical limitations encountered by nullers are
rapid phase fluctuations in the incoming light causing instability in the
interference and chromaticity of the directional couplers that prevent a deep
broadband interferometric null. We explore the use of a tricoupler designed by
ultrafast laser inscription that solves both issues. Simulations of a
tricoupler, incorporated into a nuller, result in order of a magnitude
improvement in null depth.

9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph