制导光纤在武器装备应用中面临严酷的力学环境,为保障高速释放过程中光纤的可靠性,其外部设计了护套层,目前的研究缺乏对该护套层的实际承力检测方案及相关分析,为了测量并评估制导光纤护套层的承力能力,首次采用了集总式和分布式两种测量方案,基于光纤色散仪和布里渊光时域分析技术(Brillouin Optical Time Domain Analysis,BOTDA)的测试设备搭建了制导光纤护套层承力测试装置;测量了典型制导光纤的护套层承力大小,对比了集总式和分布式测量实验数据,验证了两种测量方案的有效性,并分析了护套层和内层光纤的承力关系。两种方案的测试相对误差在典型轴向载荷时约为0.4%。当制导光纤受到典型轴向载荷值时,其护套层与内层光纤的应变量差异约为0.3%,而护套层的承力值约为内层光纤的5-6倍,根据该方案可以进一步约束并完善对制导光纤的设计要求,以满足不同武器装备对光纤制导能力的需求,为制导光纤的护套层承力能力的提升奠定基础,对制导光纤的研发具有一定的指导意义。

Guidance optical fibers in weapon systems operate under extreme mechanical conditions.To ensure reliability during high-speed deployment,a jacket layer is designed as external protection.However,existing research lacks practical tension detection schemes and analytical methods for evaluating the load-bearing performance of this critical layer.This study first proposes two novel measurement strategies to assess the jacket layer’s load-bearing capacity:a lumped measurement approach utilizing optical fiber dispersion analyzers,and a distributed measurement method based on Brillouin Optical Time Domain Analysis (BOTDA) technology.A dedicated testing apparatus compatible with both measurement principles was developed to systematically evaluate the jacket layer's load-bearing characteristics.Experimental measurements quantified the load-bearing performance of typical guidance fiber jacket layers,with comparative analysis demonstrating the validity of both lumped and distributed approaches.The mechanical interaction between the jacket layer and inner fiber was thoroughly investigated.The results showed a relative measurement error of approximately 0.4% between the two methods under standard axial loads.When subjected to typical axial loading conditions,the strain difference between the jacket layer and inner fiber reached 0.3%,while the jacket layer sustained 5-6 times greater tension than the inner fiber.These findings establish essential design criteria for guidance optical fibers to meet diverse military equipment requirements,providing fundamental insights for optimizing jacket layer performance.The proposed methodology provides actionable design guidelines,thereby steering the development trajectory of guidance optical fibers.