Chi Hao, He Xinying, Lu Dezhou, Wang Shuoyang, Wu Jiahui, Jin Mengyang, Li Xueliang, Wang Zhuning, Ma Yaoguang
State Key Laboratory for Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Intelligent Optics and Photonics Research Center, ZJU-Hangzhou Global Scientific and Technological Innovation Center, International Research Center for Advanced Photonics, Zhejiang University, Hangzhou, 310027, China.
Front Optoelectron. 2025 Aug 4;18(1):16. doi: 10.1007/s12200-025-00160-8.
As nonlinearity is highly correlated with their geometric dimensions, precise fabrication of optical micro/nanofibers (MNFs) has been a longstanding pursuit. Existing MNFs fabrication systems typically adopt horizontal structures, which inherently introduce inaccuracy stem from asymmetry between fiber axis/geometry and chaotic environment due to high temperature airflow, vibration, etc., leading to deviations from the expected fiber morphology, especially for complex-structured MNFs. Here, we propose and manufacture a MNFs fabrication systems, effectively reducing fiber shape deviations during the fabrication process, enabling the fabrication of precise MNFs. To demonstrate the capability of our system in manufacturing precise structure MNFs, we design and fabricate diameter-gradient microfibers with four cascaded structures over a length of approximately 120 mm and a minimum diameter of about 1 μm for on-demand nonlinearity to generate supercontinuum spectrum. Eventually, we obtain supercontinuum spectrum covering 1463-1741 nm at the - 10 dB level with an efficiency of 264.62 , exhibiting good flatness and enabling efficient spectral broadening.
由于非线性与它们的几何尺寸高度相关，光学微/纳米纤维（MNFs）的精确制造一直是人们长期追求的目标。现有的MNFs制造系统通常采用水平结构，这会由于高温气流、振动等导致纤维轴/几何形状与混沌环境之间的不对称，从而固有地引入不准确性，导致与预期的纤维形态产生偏差，特别是对于复杂结构的MNFs。在此，我们提出并制造了一种MNFs制造系统，有效减少了制造过程中的纤维形状偏差，能够制造精确的MNFs。为了证明我们的系统在制造精确结构MNFs方面的能力，我们设计并制造了具有四个级联结构的直径渐变微纤维，长度约为120 mm，最小直径约为1μm，用于按需产生非线性以生成超连续谱。最终，我们在-10 dB水平下获得了覆盖1463 - 1741 nm的超连续谱，效率为264.62 ，具有良好的平坦度并能实现高效的光谱展宽。
