博客 ... upper laser level 上限激光电平 upper level lifetime 上能级寿命 upper sideband 上边带 ...
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Yb-doped fiber lasers have many advantages such as wide gain andabsorption band, long upper level lifetime, high pump efficiency, largeselect wide at pumping wavelength and suitable for being pumped by LD.
掺Yb光纤激光器具有宽吸收谱、宽增益带和调谐范围，且上能级寿命长，泵浦效率高，适合于性能成熟的LD泵浦等。
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该表达式适用于光泵脉冲宽度与激活介质上能级寿命比值为任意值的情况。
This analytical expression is valid for arbitrary values of the pumping light pulsewidth and the upper laser level lifetime.
推导了准三能级系统的储能公式。此公式与以前的结果不同，认为有效储能时间不等于上能级寿命。
A formula of energy storage in three-level system is deduced, which is different from the previous results in which the upper state lifetime is taken as the energy storage time.
在考虑了有限的下能级寿命和激光能级与晶格场的相互作用的基础上，对四能级激光的速率方程组进行了求解。
The rate equations for a continuous four level laser are solved in this letter, taking into account the finite lower level lifetime and the crystal field splitting of the laser levels.
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