Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An on-chip diamond optical parametric oscillator   Efficient, on-chip optical nonlinear processes are of great interest for the
development of compact, robust, low-power consuming systems for applications in
spectroscopy, metrology, sensing and classical and quantum optical information
processing. Diamond holds promise for these applications, owing to its
exceptional properties. However, although significant progress has been made in
the development of an integrated diamond photonics platform, optical
nonlinearities in diamond have not been explored much apart from Raman
processes in bulk samples. Here, we demonstrate optical parametric oscillations
(OPO) via four wave mixing (FWM) in single crystal diamond (SCD) optical
networks on-chip consisting of waveguide-coupled microring resonators.
Threshold powers as low as 20mW are enabled by ultra-high quality factor
(1*10^6) diamond ring resonators operating at telecom wavelengths, and up to 20
new wavelengths are generated from a single-frequency pump laser. We also
report the inferred nonlinear refractive index due to the third-order
nonlinearity in diamond at telecom wavelengths.

27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga