Thermooptically induced bias drift in fiber optical Sagnac interferometers
Thermooptically induced bias drift in fiber optical Sagnac interferometers
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DOI：
10.1109/50.476134
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发表时间：
1996
影响因子：
4.7
通讯作者：
F. Mohr
中科院分区：
文献类型：
--
作者：
F. Mohr
在光纤Sagnac干涉仪中，如果线圈经历变化的环境条件，则会出现偏置漂移。我们开发了一种形式主义，描述通过动态变化的不均匀性的纤维，考虑到特定的缠绕几何形状的错误生成。作为可能的来源，我们假设热波通过线圈径向传播。我们验证的基本关系，通过比较从传统的，所谓的圆筒线圈的加热实验的结果。我们从理论上探讨了性能得到改善的特点，从线圈计划。四极方案构成的最佳解决方案考虑速率和角度误差，但是，它表现出明显的不对称性相对于传播方向的干扰。我们表明，对于一个给定的卷曲计划，渐近角误差只取决于稳态温度分布，独立于前面的过渡行为。对于具有给定光纤长度和线圈直径的四极布置，其唯一地由穿过线圈横截面积的功率的量确定，并且与层的数量无关。我们的理论已经发展到他们的动态，而不仅仅是渐近行为的特点卷曲计划。因此，它可以扩展到涵盖其他动态误差源，例如振动或声学。
In a fiber optical Sagnac interferometer bias drift arises if the coil experiences varying environmental conditions. We develop a formalism that describes error generation through dynamically changing inhomogeneities in the fiber, taking into account specific winding geometries. As possible sources we assume thermal waves propagating radially through the coil. We verify the basic relations by comparing to results from a heating experiment on a conventional, so-called cylinder coil. We theoretically explore the performance obtained from coiling schemes with improved characteristics. The quadrupolar scheme constitutes the best solution considering rate and angular error, however, it exhibits a pronounced unsymmetry with respect to the propagation direction of the disturbance. We show that, for a given coiling scheme, the asymptotic angular error depends only on the steady state temperature profile, being independent of the preceding transitional behavior. For the quadrupole arrangement with given fiber length and coil diameter it is uniquely determined by the amount of power traversing the coil cross-sectional area, and is independent of the number of layers. Our theory has been developed to characterize coiling schemes in their dynamical-rather than only asymptotic-behavior. It can thus be extended to cover other dynamical sources of error, e.g. vibrational or acoustical.