Large core air cladding micro structured optical fiber for kW laser transmission
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摘要:
kW级高功率激光柔性传输是激光清洗、激光焊接、激光刻蚀等高功率激光加工领域中必备的环节，而实现高功率激光低损耗传输的光纤是其关键器件。目前高功率激光传输光纤采用大芯径传能光纤，仍然存在着弯曲损耗大、柔性差等问题，并且使用过程中要经常维护。华南师范大学特种光纤研究中心提出一种大芯径空气包层微结构光纤，利用包层的空气孔可以极大降低激光泄露的风险，降低光纤制备过程中对耐高温涂敷层的严苛要求，实验结果证实该光纤在室温无制冷条件下可实现kW级激光传输，从而为10 kW级高功率激光柔性传输奠定基础。
Abstract:Kilowatt high power laser flexible transmission is a necessary link in the field of high power laser processing such as laser cleaning, laser welding, laser etching, and the low loss optical fiber with bend loss is the key device to realize high power laser transmission. At present, high power laser transmission fiber adopts large core diameter fiber, but there are some problems, such as large bending loss, poor flexibility and so on. Therefore, a large core diameter air clad micro structure optical fiber is proposed. The air holes in the fiber cladding can greatly reduce the risk of laser leakage, reduce the strict requirements of high temperature coating in the process of fiber preparation, and achieve kW laser output, thus offer the foundation for the flexible transmission of 10 kW high-power laser.
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图 1 大芯径空气包层微结构光纤端面图
Figure 1. Large core diameter air clad micro structure optical fiber cross sections
图 2 大芯径空气包层微结构光纤激光传输实验测试装置及原理图
Figure 2. Measurement setup for high power of large core diameter air clad microstructure optical fiber
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