• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VI; Progress in Biomedical Optics and Imaging; vol.7 no.6 >Enhanced spectral sensitivity of fibre long period gratings to refractive index of aqueous solutions utilising copper patterned coatings
【24h】

Enhanced spectral sensitivity of fibre long period gratings to refractive index of aqueous solutions utilising copper patterned coatings

机译：利用铜图案涂层提高了光纤长周期光栅对水溶液折射率的光谱敏感性

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A set of long period grating devices have been fabricated in photosensitive single mode fibre coated with a series of copper rings (period of 380μm, 50% duty cycle and length of 4cm). The long period gratings were inscribed with a uniform UV-laser exposure across the entire length of the copper ring patterned coating. The devices ranged in copper thickness from 0.5μm to 1.5μm. In addition, a control long period grating was fabricated in the same type of fibre with the same period for comparison. The refractive index and temperature spectral sensitivity of these devices were investigated and it was found that the index and temperature sensitivity is a function of the thickness of the copper rings, as supported by theoretical modelling. Furthermore, the index sensitivity of these devices in the 1.333 index region is greater than the control long period grating. The patterned 0.5 μm coated long period grating gave a sensitivity of Δλ/Δn = -74 nm leading to a resolution of 1.4x10~(-3) compared to the control which had a sensitivity of Δλ/Δn = -32 nm with a resolution of 3.2x10~(-3) in the index region of 1.320 to 1.380 (aqueous solution regime). This demonstrates a two fold increase in the sensitivity. This novel fibre long period grating device shows potential for increasing the resolution of measurements of the index of aqueous solutions.
机译：一组长期光栅器件已经用涂覆有一系列铜环（周期为380μm，占空比为50％，长度为4cm）的光敏单模光纤制成。在铜环图案化涂层的整个长度上，对长时间光栅刻有均匀的紫外线激光照射。器件的铜厚度范围从0.5μm到1.5μm。另外，在相同类型的光纤中以相同的周期制造了可控的长周期光栅以进行比较。对这些器件的折射率和温度光谱灵敏度进行了研究，发现该折射率和温度灵敏度是铜环厚度的函数，这在理论模型上得到了支持。此外，这些器件在1.333折射率范围内的折射率灵敏度大于控制长周期光栅。图案化的0.5μm涂覆的长周期光栅给出了Δλ/Δn= -74 nm的灵敏度，从而导致分辨率为1.4x10〜（-3），而相比之下，对照组的Δλ/Δn= -32 nm在1.320至1.380的索引区域中的3.2x10〜（-3）（水溶液状态）。这表明灵敏度提高了两倍。这种新颖的光纤长周期光栅装置显示了提高水溶液折射率测量分辨率的潜力。

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