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arXiv · 2406.02137

Enhanced Nonlinear Frequency Conversion Bandwidth through Birefringence induced Mode Hybridization

Tingge Yuan·Jiangwei Wu·Xueyi Wang·Hao Li·Yuping Chen·Xianfeng Chen
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Abstract

On-chip quantum information network requires qubit transfer between different wavelengths while preserving quantum coherence and entanglement, which needs broadband up-conversion available. Herein, we demonstrate a mode-hybridization based broadband nonlinear frequency conversion on X-cut thin film lithium niobate. With the spontaneous quasi-phase matching and quasi groupvelocity matching being simultaneously satisfied, broadband second harmonic generation with a 3-dB bandwidth up to 13 nm has been achieved in a micro-racetrack resonator. The same mechanism can work on the frequency conversion of the ultra-short pulse in the bent waveguide structure. This work will be beneficial to on-chip tunable frequency conversion and quantum light source generation on integrated photonic platforms, and further enable on-chip large-capacity multiplexing, multichannel optical information processing, and large quantum information networks.

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Tingge Yuan, Jiangwei Wu, Xueyi Wang, Hao Li, Yuping Chen, Xianfeng Chen. 2024-06-04. Enhanced Nonlinear Frequency Conversion Bandwidth through Birefringence induced Mode Hybridization. https://arxiv.org/abs/2406.02137

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