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提出了具有非相干抽运的开放的ladder型无粒子数反转激光 (LWI)系统模型 ,给出了定态线性解析解 ,研究了探测场和驱动场失谐的变化对无粒子数反转激光增益、色散和粒子数差的影响。结果发现 ,开放的ladder型系统的无粒子数反转激光增益远大于相应的封闭系统 ;其增益、色散和粒子数差的变化规律与开放的Λ型及简单三能级无粒子数反转激光系统有很大不同。
An open ladder-type LWI laser system with incoherent pumping is proposed. The steady-state linear analytic solution is given. The changes of the detuning of the detection field and the driving field are studied. Laser Gain, Chromatic Dispersion, and Particle Number Differences. The results show that the laser gain of the open ladder-type system is much larger than that of the corresponding closed system. The change of gain, dispersion and number of particles difference is similar to the open Λ-type and simple three-level particle-free inversion laser The system is very different.