Related papers: Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared

Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared

URL: http://arxiv.org/abs/2408.12203v1
Date: Thu, 22 Aug 2024 08:23:35 GMT
Title: Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared
Authors: Franz Roeder, Abira Gnanavel, René Pollmann, Olga Brecht, Michael Stefszky, Laura Padberg, Christof Eigner, Christine Silberhorn, Benjamin Brecht,
Abstract summary: We present an integrated PDC source based on a Ti:LiNbO$_3$ waveguide that generates broadband bi-photons with central wavelengths at $860,mathrmnm$ and $2800,mathrmnm$. Their spectral bandwidth exceeds $25,mathrmTHz$ and is achieved by simultaneous matching of the group velocities and cancellation of group velocity dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source's behaviour at different temperatures and pump wavelengths, which agrees well with simulations.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The latest applications in ultrafast quantum metrology require bright, broadband bi-photon sources with one of the photons in the mid-infrared and the other in the visible to near infrared. However, existing sources based on bulk crystals are limited in brightness due to the short interaction length and only allow for limited dispersion engineering. Here, we present an integrated PDC source based on a Ti:LiNbO$_3$ waveguide that generates broadband bi-photons with central wavelengths at $860\,\mathrm{nm}$ and $2800\,\mathrm{nm}$. Their spectral bandwidth exceeds $25\,\mathrm{THz}$ and is achieved by simultaneous matching of the group velocities and cancellation of group velocity dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source's behaviour at different temperatures and pump wavelengths, which agrees well with simulations.

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