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arXiv · 2011.10352

Efficient frequency conversion in a degenerate $χ^{(2)}$ microresonator

Jia-Qi Wang·Yuan-Hao Yang·Ming Li·Xin-Xin Hu·Joshua B. Surya·Xin-Biao Xu·Chun-Hua Dong·Guang-Can Guo·Hong X. Tang·Chang-Ling Zou
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Abstract

Microresonators on a photonic chip could enhance nonlinear optics effects, thus are promising for realizing scalable high-efficiency frequency conversion devices. However, fulfilling phase matching conditions among multiple wavelengths remains a significant challenge. Here, we present a feasible scheme for degenerate sum-frequency conversion that only requires the two-mode phase matching condition. When the drive and the signal are both near resonance to the same telecom mode, an efficient on-chip photon-number conversion efficiency upto 42% was achieved, showing a broad tuning bandwidth over 250GHz. Furthermore, cascaded Pockels and Kerr nonlinear optical effects are observed, enabling the parametric amplification of the optical signal to a distinct wavelength in a single device. The scheme demonstrated in this work provides an alternative approach to realizing high-efficiency frequency conversion and is promising for future studies on communications, atom clocks, sensing, and imaging.

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Jia-Qi Wang, Yuan-Hao Yang, Ming Li, Xin-Xin Hu, Joshua B. Surya, Xin-Biao Xu, Chun-Hua Dong, Guang-Can Guo, Hong X. Tang, Chang-Ling Zou. 2020-11-20. Efficient frequency conversion in a degenerate $χ^{(2)}$ microresonator. https://doi.org/10.1103/physrevlett.126.133601

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