一种在线测量AFOCT系统的传感光纤双折射率的方法
By measuring the birefringence of the sensing fiber in the AFOCT system online, and using a three-dimensional surface model and system transmission rate calculation, the measurement error problem caused by fiber aging was solved, and efficient and accurate fiber birefringence measurement was achieved.
CN116147893BActive Publication Date: 2026-07-17NANJING UNIV OF POSTS & TELECOMM
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING UNIV OF POSTS & TELECOMM
- Filing Date
- 2023-01-19
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing technologies, the aging of sensing optical fibers leads to large measurement errors in all-fiber current transformers, and existing methods require disassembling the optical fibers for measurement, which is cumbersome and prone to errors.
Method used
By measuring the birefringence of the sensing fiber in the AFOCT system online, and using a three-dimensional surface model and system transmission rate calculation, the linear and circular birefringence of the sensing fiber can be obtained, avoiding fiber disassembly and improving measurement accuracy.
Benefits of technology
Online measurement of the birefringence of sensing optical fibers was achieved, avoiding the cumbersome disassembly process and improving the accuracy and reliability of the measurement.
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Figure CN116147893B_ABST
Abstract
本发明公开了一种在线测量AFOCT系统的传感光纤双折射率的方法，包括如下步骤：获取含有待测量的传感光纤的AFOCT系统，及AFOCT系统在多个预设的方波调制相位差下的三维曲面模型；测量AFOCT系统在每个预设的方波调制相位差下的输入光功率和输出光功率，计算得到多个系统传输率；将系统传输率对应的平面模型与对应的方波调制相位差下的三维曲面模型相交，得到多条曲线；将多条曲线投影至同一平面，得到多条曲线的交点，进而得到线性双折射率和圆双折射率。本发明实现了传感光纤的双折射率的在线测量，不仅避免了现有技术方案中需要拆卸传感光纤的繁琐过程，而且操作简洁，同时提高了测量的准确性。
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