Chen Nan, Zhang Xuedian, Lu Xinglian, Zhang Zheng, Mu Zhangjian, Chang Min
Key Laboratory of Optical Technology and Instrument for Medicine, Ministry of Education, University of Shanghai for Science and Technology, Shanghai 200093, China.
Shanghai Key Laboratory of Molecular Imaging, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China.
Micromachines (Basel). 2020 Jul 21;11(7):706. doi: 10.3390/mi11070706.
A polarization beam splitter is an important component of modern optical system, especially a splitter that combines the structural flexibility of photonic crystal fiber and the optical modulation of functional material. Thus, this paper presents a compact dual-core photonic crystal fiber polarization beam splitter based on thin layer AsS. The mature finite element method was utilized to simulate the performance of the proposed splitter. Numerical simulation results indicated that at 1.55 μm, when the fiber device length was 1.0 mm, the x- and y-polarized lights could be split out, the extinction ratio could reach -83.6 dB, of which the bandwidth for extinction ratio better than -20 dB was 280 nm. It also had a low insertion loss of 0.18 dB for the x-polarized light. In addition, it can be completely fabricated using existing processes. The proposed compact polarization beam splitter is a promising candidate that can be used in various optical fields.
偏振分束器是现代光学系统的重要组成部分，尤其是一种结合了光子晶体光纤结构灵活性和功能材料光学调制的分束器。因此，本文提出了一种基于AsS薄层的紧凑型双芯光子晶体光纤偏振分束器。利用成熟的有限元方法对所提出的分束器的性能进行了模拟。数值模拟结果表明，在1.55μm波长下，当光纤器件长度为1.0mm时，可以分离出x偏振光和y偏振光，消光比可达-83.6dB，其中消光比优于-20dB的带宽为280nm。对于x偏振光，其插入损耗也较低，为0.18dB。此外，它可以完全采用现有工艺制造。所提出的紧凑型偏振分束器是一种有前途的候选器件，可用于各种光学领域。
