公式： s=△P/P 式中△P为在一定时问范围内(一般取一个小时)输出功率变化的绝对值，P为此时间内的输出功率平均值。
该装置结构紧凑轻便，输出功率大，输出电压波形良好，输出电压稳定度高。
The system has many advantages: compact and portable structure, large power output, excellent output voltage wave-form and stability etc.
输出功率不稳定度小于1%。
与其他结构光纤激光器相比，这种全光纤结构具有更高的效率和更好的稳定性，且在整个调谐宽度范围内，激光输出功率具有很好的平坦度。
Compared with the other fiber laser structure, our all-fiber structure has higher efficiency and better stability. The laser also has very stable and flat output during the whole tuning range.
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