Bandwidth-Tunable Quantum Light Source at 1.5 μm
Abstract
Quantum light sources constitute a crucial physical resource for the construction of quantum networks. Despite remarkable recent progress, there remains a lack of systematic investigation into the bandwidth tunability of quantum light sources under fixed waveguide parameters. In this work, we demonstrate a broadband quantum light source in the 1.5 μm band with tunable bandwidth by changing the temperature of a piece of periodically poled lithium niobate waveguide. In our demonstration, the bandwidth of the quantum light source is tuned from 78.3 nm to 96.2 nm with a temperature change of 1 ∘C . Under different bandwidths, the generation rates of correlated photon pairs are greater than 6.3 MHz with coincidence-to-accidental ratios consistently being no less than 608. The energy-time entanglement properties are measured by using the Franson interference with two-photon interference visibilities larger than 99.06%. Our results provide an effective method for developing the quantum light sources with tunable bandwidth which has great potential for building the large-scale quantum networks.
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BibTeX
@misc{wu2026bandwidthtunable,
title = {{Bandwidth-Tunable Quantum Light Source at 1.5 $μ$m}},
author = {Wei Wu and Yun-Ru Fan and Ri-Yao Song and Si Shen and Zi-Chang Zhang and Hai-Zhi Song and Hao Li and Li-Xing You and Ping-He Wang and Yan-Yu Wei and Kai Guo and Guang-Can Guo and Qiang Zhou},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.20251},
eprint = {2609.20251},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20251},
}
RIS
TY - UNPB
TI - Bandwidth-Tunable Quantum Light Source at 1.5 μm
AU - Wei Wu
AU - Yun-Ru Fan
AU - Ri-Yao Song
AU - Si Shen
AU - Zi-Chang Zhang
AU - Hai-Zhi Song
AU - Hao Li
AU - Li-Xing You
AU - Ping-He Wang
AU - Yan-Yu Wei
AU - Kai Guo
AU - Guang-Can Guo
AU - Qiang Zhou
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2609.20251
UR - https://arxiv.org/abs/2609.20251
AB - Quantum light sources constitute a crucial physical resource for the construction of quantum networks. Despite remarkable recent progress, there remains a lack of systematic investigation into the bandwidth tunability of quantum light sources under fixed waveguide parameters. In this work, we demonstrate a broadband quantum light source in the 1.5 μm band with tunable bandwidth by changing the temperature of a piece of periodically poled lithium niobate waveguide. In our demonstration, the bandwidth of the quantum light source is tuned from 78.3 nm to 96.2 nm with a temperature change of 1 ^∘C . Under different bandwidths, the generation rates of correlated photon pairs are greater than 6.3 MHz with coincidence-to-accidental ratios consistently being no less than 608. The energy-time entanglement properties are measured by using the Franson interference with two-photon interference visibilities larger than 99.06%. Our results provide an effective method for developing the quantum light sources with tunable bandwidth which has great potential for building the large-scale quantum networks.
ER -