Lasing Without Inversion 无反转激光 ; 无反置雷射 ; 无粒子数反转激光
free-electron lasing without inversion 无反转自由电子激光器
Inversion without lasing can also occur when the conditions are changed.
在另一条件下，系统则能够呈现无激光反转。
This thesis mainly discusses the physics mechanism of lasing without inversion and proposed a closed four-level atomic model for the lasing without inversion.
本文主要的探讨了无粒子数反转激光的物理机制，建议了一种封闭的四能级无反转激光模型，并证明它也能够呈现无粒子数反转光放大现象。
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