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首页> 外文期刊>Optical fiber technology >Design of dual-coated optical fibers to minimize thermally induced static fatigue caused by viscoelastic behavior of commercial polymeric coatings
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Design of dual-coated optical fibers to minimize thermally induced static fatigue caused by viscoelastic behavior of commercial polymeric coatings

机译：双涂层光纤的设计可最大程度地减少由商用聚合物涂层的粘弹性行为引起的热感应静态疲劳

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摘要

The static fatigue test shows that the lifetime of dual-coated optical fibers is governed by the axial tensile stress exerted on the glass fibers. Polymeric coatings of optical fibers own viscoelastic behavior, so the axial tensile stress acted on the glass fibers depends on the time. After recognizing the exact viscoelastic performance of commercial polymeric coatings, the long-term tensile thermal stresses applied to the glass fiber of dual-coated optical fibers are obtained by viscoelastic theory. Following, the influence of thermal stresses on the fiber's static fatigue is evaluated, and the selection of dual-coated optical fibers to lessen the static fatigue is acquired. To reduce these long-term thermal stresses, the radius, Young's modulus, thermal expansion coefficient, and relaxation time of the secondary coating should be diminished, but the strain ratio of the secondary coating should be raised. Furthermore, the secondary coating should possess sufficiently radius and Young's modulus to withstand external mechanical damage.
机译：静态疲劳测试表明，双面涂层光纤的寿命受施加在玻璃纤维上的轴向拉应力的控制。光纤的聚合物涂层具有粘弹性，因此作用在玻璃纤维上的轴向拉伸应力取决于时间。在认识到商用聚合物涂层的精确粘弹性能之后，通过粘弹性理论获得了施加在双涂层光纤玻璃纤维上的长期拉伸热应力。随后，评估了热应力对光纤静态疲劳的影响，并获得了选择双涂层光纤以减轻静态疲劳的选择。为了减小这些长期的热应力，应减小二次涂层的半径，杨氏模量，热膨胀系数和松弛时间，但应提高二次涂层的应变比。此外，第二涂层应具有足够的半径和杨氏模量以承受外部机械损伤。

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