Cordier Martin, Delaye Philippe, Gérôme Frédéric, Benabid Fetah, Zaquine Isabelle
LTCI, Télécom Paris, Institut Polytechnique de Paris, 91120, Palaiseau, France.
Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127, Palaiseau, France.
Sci Rep. 2020 Feb 3;10(1):1650. doi: 10.1038/s41598-020-58229-7.
Raman-scattering noise in silica has been the key obstacle toward the realisation of high quality fiber-based photon-pair sources. Here, we experimentally demonstrate how to get past this limitation by dispersion tailoring a xenon-filled hollow-core photonic crystal fiber. The source operates at room temperature, and is designed to generate Raman-free photon-pairs at useful wavelength ranges, with idler in the telecom, and signal in the visible range. We achieve a coincidence-to-accidentals ratio as high as 2740 combined with an ultra low heralded second order coherence [Formula: see text], indicating a very high signal to noise ratio and a negligible multi-photon emission probability. Moreover, by gas-pressure tuning, we demonstrate the control of photon frequencies over a range as large as 13 THz, covering S-C and L telecom band for the idler photon. This work demonstrates that hollow-core photonic crystal fiber is an excellent platform to design high quality photon-pair sources, and could play a driving role in the emerging quantum technology.
二氧化硅中的拉曼散射噪声一直是实现高质量基于光纤的光子对源的关键障碍。在此，我们通过对填充氙气的空心光子晶体光纤进行色散定制，实验演示了如何克服这一限制。该光源在室温下工作，旨在在有用的波长范围内产生无拉曼的光子对，闲频光处于电信波段，信号光处于可见光范围。我们实现了高达2740的符合与偶然事件比，同时具有超低的预示二阶相干性[公式：见正文]，表明具有非常高的信噪比和可忽略不计的多光子发射概率。此外，通过气压调谐，我们展示了在高达13太赫兹的范围内对光子频率的控制，涵盖了闲频光子的S - C和L电信波段。这项工作表明，空心光子晶体光纤是设计高质量光子对源的优秀平台，并且可能在新兴的量子技术中发挥推动作用。
