高功率密度光纤激光元器件传输特性测试系统

为了提高高功率密度下光纤激光元器件传输特性测量精度,采用基于光纤标准测试方法的双光路测量结构,设计了自动光功率比测量系统。对双光路系统的特点进行了理论分析和实验验证。利用固体微晶片激光器作为光源输出,建立了折射率匹配法传输特性测试仪实验装置,对掺镱双包层光纤的传输损耗特性进行了测量。实验中测得35m长掺镱双包层光纤对1064nm光的插入损耗为2.645dB,测得100组数据对应的标准偏差为0.026dB。并在不同的条件下进行了多次重复实验,重复测量误差不超过0.07dB。这一结果对于提高光纤激光元器件测试精度是有帮助的。

Transmission Characteristics Measurement System of Fiber Laser Fiber Devices in High Power Density

In order to improve the measurement accuracy of the transmission characteristics of the parts in high power fiber laser，an automated measurement system of power ratio was designed by means of the dual optical path measuring system with full consideration of the standard transmission measuring methods. The dual optical path measuring system was analyzed. With the measuring system equipped with a microchip solid laser and a unique refractive index matching cladding mode filter, the transmission loss of a double clad fiber laser was measured. In experiment, for a 35m of Ytterbium doped double cladding fiber its insert loss was 2.645dB at 1064nm and standard deviation is 0.026dB for 100 test data. Moreover, the repeated measurement error was less than 0.07dB proven by the experiments under different conditions. The result is useful to improve the measurement accuracy.