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Diamond nonlinear photonics
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Journal Article
Diamond nonlinear photonics
2014
Overview
An optical parametric oscillator in the telecom wavelength range is realized in a diamond system consisting of a ring resonator coupled to a diamond waveguide. Threshold powers as low as 20 mW are measured and up to 20 new wavelengths are generated from a single-frequency pump laser.
Despite progress towards integrated diamond photonics
1
,
2
,
3
,
4
, studies of optical nonlinearities in diamond have been limited to Raman scattering in bulk samples
5
. Diamond nonlinear photonics, however, could enable efficient,
in situ
frequency conversion of single photons emitted by diamond's colour centres
6
,
7
, as well as stable and high-power frequency microcombs
8
operating at new wavelengths. Both of these applications depend crucially on efficient four-wave mixing processes enabled by diamond's third-order nonlinearity. Here, we have realized a diamond nonlinear photonics platform by demonstrating optical parametric oscillation via four-wave mixing using single-crystal ultrahigh-quality-factor (1 × 10
6
) diamond ring resonators operating at telecom wavelengths. Threshold powers as low as 20 mW are measured, and up to 20 new wavelengths are generated from a single-frequency pump laser. We also report the first measurement of the nonlinear refractive index due to the third-order nonlinearity in diamond at telecom wavelengths.
