...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Lightwave Technology >Long-Range and High-Spatial-Resolution Distributed Birefringence Measurement of a Polarization-Maintaining Fiber Based on Brillouin Dynamic Grating
【24h】

Long-Range and High-Spatial-Resolution Distributed Birefringence Measurement of a Polarization-Maintaining Fiber Based on Brillouin Dynamic Grating

机译：基于布里渊动态光栅的保偏光纤的远距离和高空间分辨率双折射测量

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

We report a long-range and high-spatial-resolution distributed measurement of the birefringence of a polarization-maintaining fiber based on Brillouin dynamic grating (BDG) through optimizing the pump and probe scheme in the time-domain. The optimal scheme includes a CW pump1, a long pump2 pulse, and a short probe pulse, where the long pump2 pulse can effectively excite a BDG with a relatively low power to avoid other nonlinear effects in a long-length fiber, and the short probe pulse is used to improve the spatial resolution. The numerical simulations verify that with this scheme the spatial resolution is determined by the duration of the probe pulse, while the BDG reflection spectrum width increases with shorting the duration of the probe pulse. In experiment, a measurement of a 500-m Panda polarization-maintaining fiber with a 20-cm resolution is realized by using a 20-ns pump2 pulse and a 2-ns probe pulse. The results clearly show the 49-cm spatial period of the birefringence variation caused by the uneven stress as winding the fiber around a spool. Besides, longer spatial periods of the birefringence variation are also observed, which could be caused by the residual stress during the fiber drawing and coating processes or the nonuniformity of fiber preform.
机译：我们报告了通过优化时域中的泵浦和探测方案，基于布里渊动态光栅（BDG）的保偏光纤的双折射的远程高空间分辨率分布式测量。最佳方案包括CW泵1，长泵2脉冲和短探针脉冲，其中长泵2脉冲可以以较低的功率有效地激发BDG，从而避免了长光纤中的其他非线性影响，以及短探针脉冲用于提高空间分辨率。数值模拟证明，采用该方案，空间分辨率由探测脉冲的持续时间确定，而BDG反射光谱的宽度随着探测脉冲的持续时间的缩短而增加。在实验中，通过使用20 ns的pump2脉冲和2 ns的探测脉冲，可以测量分辨率为20 cm的500 m熊猫偏振保持光纤。结果清楚地表明，在绕线轴缠绕光纤时，由于应力不均匀而引起的双折射变化的空间间隔为49厘米。此外，还观察到更长的双折射变化的空间周期，这可能是由纤维拉伸和涂覆过程中的残余应力或纤维预制棒的不均匀引起的。

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