Integrated high-quality multi-wavelength quantum light source compatible with ITU Channel Grid

IF 9 1区物理与天体物理 Q1 PHYSICS, APPLIED

npj Quantum Information Pub Date : 2026-06-06 DOI:10.1038/s41534-026-01290-3

Jing Qiu, Yilin Yang, Chennan Wu, Jiaqi Zhao, Yuankai Liu, Yuanhua Li, Hao Li, Yuanlin Zheng, Xianfeng Chen

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引用次数: 0

Abstract

Scalable quantum networks require high-quality multi-wavelength light sources to enable simultaneous quantum communication among multiple users1. However, realizing such sources with high brightness, low noise, and chip-scale integration remains challenging. We demonstrate a high-quality and multi-wavelength quantum light source based on a periodically poled thin-film lithium niobate (TFLN) microring resonator employing spontaneous parametric down-conversion (SPDC) with a 100-GHz free spectral range (FSR), compatible with International Telecommunication Union (ITU) Channel Grid. In our experiment, twelve pairs of non-degenerate photon pairs are generated, exhibiting a photon-pair generation rate (PGR) of 817 MHz/mW, brightness of 1.86 × 109 Hz/mW2/GHz, and a coincidence-to-accidental ratio (CAR) of 51,829 ± 2204. The source enables predictable single photons with g(2)(0) = 0.015 ± 0.006 and energy-time entanglement with 99.5% raw visibility. Operating at room temperature, telecom wavelengths, and compatible with network channels, this work represents a crucial step toward realistic scalable, integrated quantum photonic networks in the future.

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兼容ITU信道网格的集成高质量多波长量子光源

可扩展量子网络需要高质量的多波长光源，以实现多个用户之间的同时量子通信1。然而，实现这种高亮度、低噪声和芯片级集成的光源仍然具有挑战性。我们展示了一种基于周期性极化薄膜铌酸锂（TFLN）微环谐振器的高质量多波长量子光源，该谐振器采用自发参数下转换（SPDC），具有100 ghz自由频谱范围（FSR），与国际电信联盟（ITU）信道网格兼容。在我们的实验中，产生了12对非简并光子对，光子对产生率（PGR）为817 MHz/mW，亮度为1.86 × 109 Hz/mW2/GHz，巧合-意外比（CAR）为51,829±2204。该光源使可预测的单光子具有g(2)(0) = 0.015±0.006和能量-时间纠缠，具有99.5%的原始可见度。在室温、电信波长下工作，并与网络信道兼容，这项工作代表了未来实现可扩展、集成量子光子网络的关键一步。

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来源期刊

npj Quantum Information Computer Science-Computer Science (miscellaneous)

CiteScore

13.70

自引率

3.90%

发文量

130

审稿时长

29 weeks

期刊介绍： The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.