Spectral noise in frequency conversion from the visible to the telecommunication C-band.

@article{Strassmann2019SpectralNI,
  title={Spectral noise in frequency conversion from the visible to the telecommunication C-band.},
  author={Peter C Strassmann and Anthony Martin and Nicolas Gisin and Mikael Afzelius},
  journal={Optics express},
  year={2019},
  volume={27 10},
  pages={
          14298-14307
        }
}
We report a detailed study of the noise properties of a visible-to-telecom photon frequency converter based on difference frequency generation (DFG). The device converts 580 nm photons to 1541 nm using a strong pump laser at 930 nm, in a periodically poled lithium niobate ridge waveguide. The converter reaches a maximum device efficiency of 46 % (internal efficiency of 67%) at a pump power of 250 mW. The noise produced by the pump laser is investigated in detail by recording the noise spectra… 

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