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arXiv · 1904.13025

Frequency-multiplexed photon pairs over 1000 modes from a quadratic nonlinear optical waveguide resonator with a singly-resonant configuration

Rikizo Ikuta·Ryoya Tani·Masahiro Ishizaki·Shigehito Miki·Masahiro Yabuno·Hirotaka Terai·Nobuyuki Imoto·Takashi Yamamoto
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Abstract

We demonstrate a frequency multiplexed photon pair generation based on a quadratic nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light. We monolithically constructed the photon pair generator by a periodically-poled lithium niobate (PPLN) waveguide with a high reflective coating for the signal photons around 1600 nm and with anti-refrective coatings for the idler photons around 1520 nm and the pump light at 780 nm at the end faces of the PPLN waveguide. We observed a comb-like photon pair generation with a mode spacing of the free spectral range of the cavity. Unlike the conventional multiple resonant photon pair generation experiments, the photon pair generation were incessant within a range of 80 nm without missing teeth due to a mismatch of the energy conservation and the cavity resonance condition of the photons, resulting in over 1000-mode frequency multiplexed photon pairs in this range.

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Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki, Shigehito Miki, Masahiro Yabuno, Hirotaka Terai, Nobuyuki Imoto, Takashi Yamamoto. 2019-11-14. Frequency-multiplexed photon pairs over 1000 modes from a quadratic nonlinear optical waveguide resonator with a singly-resonant configuration. https://doi.org/10.1103/physrevlett.123.193603

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