Using a mirror, check your head for hair loss.
照一下镜子，看下你的头上有没有掉头发。
The equation that determines the function of optimum reflection Rk of the output coupling mirror M1 versus pump power, dye concentration, and loss is deduced.
推导了耦合输出镜最佳反射率和泵浦功率损耗，浓度等参量的关系。
The butted loss has been calculated when the distance between the fiber end and the mirror is L.
在此基础上讨论了光纤端面相距反射镜为L时的耦合损耗。
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