Markos Christos
DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark.
Sci Rep. 2016 Aug 19;6:31711. doi: 10.1038/srep31711.
The possibility to combine silica photonic crystal fiber (PCF) as low-loss platform with advanced functional materials, offers an enormous range of choices for the development of fiber-based tunable devices. Here, we report a tunable hybrid silica PCF with integrated As2S3 glass nanolayers inside the air-capillaries of the fiber based on a solution-processed glass approach. The deposited high-index layers revealed antiresonant transmission windows from ~500 nm up to ~1300 nm. We experimentally demonstrate for the first time the possibility to thermally-tune the revealed antiresonances by taking advantage the high thermo-optic coefficient of the solution-processed nanolayers. Two different hybrid fiber structures, with core diameter 10 and 5 μm, were developed and characterized using a supercontinuum source. The maximum sensitivity was measured to be as high as 3.6 nm/°C at 1300 nm. The proposed fiber device could potentially constitute an efficient route towards realization of monolithic tunable fiber filters or sensing elements.
将二氧化硅光子晶体光纤（PCF）作为低损耗平台与先进功能材料相结合的可能性，为基于光纤的可调谐器件的开发提供了众多选择。在此，我们报告了一种基于溶液处理玻璃方法的可调谐混合二氧化硅PCF，其在光纤的空气毛细管内集成了As2S3玻璃纳米层。沉积的高折射率层在约500 nm至约1300 nm范围内显示出反谐振传输窗口。我们首次通过利用溶液处理纳米层的高热光系数，实验证明了热调谐所揭示的反谐振的可能性。使用超连续光源开发并表征了两种不同的混合光纤结构，其纤芯直径分别为10μm和5μm。在1300 nm处测得的最大灵敏度高达3.6 nm/°C。所提出的光纤器件可能为实现单片可调谐光纤滤波器或传感元件提供一条有效途径。
