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设计了一种用于探测光纤激光器系统中有源光纤中残余的弱泵浦光的方法。采用两种光纤探针对剥离涂覆层的有源光纤以及保留涂覆层的光纤进行了包层泄漏光的测试,优选出锥形探针作为弱光探测的光纤探针,并用该探针测得泄漏光与包层残余泵浦光的功率关系,发现二者呈线性关系并有对应的比例系数。通过该光纤探针的方法可实现快速确定有源光纤在激光器中的使用最佳长度,避免传统方法中对有源光纤进行多次切割、熔接再测试等操作,极大地提高了测试效率并降低了测试成本。试验同时发现,光纤探针在剥离涂覆层光纤上的探测效果优于未剥离涂覆层的光纤探测效果。
A method for detecting the residual weak pump light in an active fiber in a fiber laser system is designed. Two kinds of optical fiber probes were used to test the coating layer-leaking active fibers and the coating-remaining optical fibers for the leak test of the cladding layer. A tapered probe is preferably used as the low-light-probing optical fiber probe, and the probe Measured the leakage of light and cladding residual pump power relationship and found a linear relationship between the two and have a corresponding proportion coefficient. Through the method of the fiber probe, the optimal length of the active fiber in the laser can be quickly determined, and the operation of cutting, welding and re-testing the active fiber in the traditional method can be avoided, thereby greatly improving the testing efficiency and reducing The test cost. The experiment also found that the optical fiber probe on the stripped coating optical fiber is better than the optical fiber probe on the non-stripped coating.