• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Conference on Liquid Crystals >Polarization-independent tunable optical filters based on liquid crystal polarization gratings
【24h】

Polarization-independent tunable optical filters based on liquid crystal polarization gratings

机译：基于液晶偏振光栅的偏振无关可调光学滤光片

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We introduce and demonstrate a novel tunable optical filter that is insensitive to input polarization. While the most obvious application of this novel filter is in compact spectroscopy, all technologies that are dependent on tunable passband fiters can benefit from it. Analogous to Lyot and Solc fiters, this filter is constructed of multiple liquid crystal polarization gratings (LCPGs) of different thicknesses. LCPGs are switchable, anisotropic, thin diffraction gratings which exhibit unique properties including diffraction at visible and infrared wavelengths that can be coupled between only the zero- and first-orders, with nearly 100% and 0% experimentally verified efficiencies. Most relevant to the filter concept introduced in this work, the transmittance of the LCPG zeroth order is independent of the incident polarization. When combined with an elemental spatial filter, polarization-independent bandpass tuning can be achieved with minimum loss. The unique filter design enables a high peak transmittance (～ 90%) that is difficult in competing polarizer-based technologies. In this work we derive the core principles of the tunable filter, present preliminary experimental data, and discuss the capabilities of the filter in terms of finesse, 3dB bandwidth (full-width at half-maximum), and free-spectral-range. We will also evaluate the most likely practical limitations imposed by material properties and fabrication.
机译：我们介绍并展示了一种新型可调光学滤波器，对输入极化不敏感。虽然这种新型过滤器的最明显的应用是紧凑的光谱学，但所有依赖于可调通带装配机的技术都可以受益于它。类似于Lyot和Solc配件，该过滤器由不同厚度的多种液晶偏振光（LCPG）构成。 LCPGS是可切换的，各向异性，薄的衍射光栅，其表现出独特的性质，包括可见光和红外波长下的衍射，其可以仅在零和第一令之间耦合，具有近100％和0％的实验验证效率。与本作工作中引入的过滤器概念最相关的，LCPG Zeroth顺序的透射率与入射极化无关。当与元素空间滤波器组合时，可以通过最小损耗实现偏振无关的带通调谐。独特的过滤器设计使得能够高峰透射率（〜90％），这难以竞争的基于偏振器的技术。在这项工作中，我们得出了可调滤波器的核心原理，目前的初步实验数据，并在技巧方面讨论过滤器的功能，3DB带宽（全宽在半最大）和自由谱范围内。我们还将评估材料性能和制造所施加的最有可能的实际限制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号