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PPLN waveguide under red laser illumination

by Sebastien_Tanzilli - published on , updated on

© Sébastien Tanzilli, LPMC, UMR 7336 CNRS / UNS, Nice, France

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PPLN waveguide under red laser illumination
A periodically poled lithium niobate (PPLN) waveguide is pumped by a red laser for highly-efficient entangled photon-pair generation at a telecom wavelength.
The underlying nonlinear optical process is called spontaneous parametric down-conversion.
Entangled photon-pairs at a telecom wavelength are widely employed for long-distance quantum communication applications.
This PPLN waveguide was fabricated at the LPMC, Nice, France