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首页> 外文期刊>Journal of Lightwave Technology >Annealing of linear birefringence in single-mode fiber coils: application to optical fiber current sensors
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Annealing of linear birefringence in single-mode fiber coils: application to optical fiber current sensors

机译：单模光纤线圈中线性双折射的退火：在光纤电流传感器中的应用

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Annealing procedures that greatly reduce linear birefringence in single-mode fiber coils are described. These procedures have been successfully applied to coils ranging from 5 mm to 10 cm in diameter and up to 200 or more turns. They involve temperature cycles that last 3-4 days and reach maximum temperatures of about 850 degrees C. The residual birefringence and induced loss, are minimized by proper selection of fiber. The primary application of these coils is optical fiber current sensors, where they yield small sensors that are more stable than those achieved by other techniques. A current sensor with a temperature stability of +8.4*10/sup -5//K over the range from -75 to +145 degrees C has been demonstrated. This is approximately 20% greater than the temperature dependence of the Verdet constant. Packaging degrades the stability, but a packaged sensor coil with a temperature stability of about +1.6+10/sup -4//K over the range from -20 to +120 degrees C has also been demonstrated.
机译：描述了大大减少单模光纤线圈中线性双折射的退火程序。这些程序已成功应用于直径从5毫米到10厘米不超过200匝的线圈。它们涉及持续3-4天并达到约850摄氏度的最高温度的温度循环。通过适当选择纤维，可以将残留的双折射和引起的损耗降至最低。这些线圈的主要应用是光纤电流传感器，它们产生的小型传感器比其他技术所获得的传感器更稳定。已经证明了在-75至+145摄氏度范围内具有+ 8.4 * 10 / sup -5 // K的温度稳定性的电流传感器。这比维尔德常数的温度依赖性大大约20％。封装降低了稳定性，但是还证明了封装的传感器线圈在-20至+120摄氏度范围内的温度稳定性约为+ 1.6 + 10 / sup -4 // K。

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