中国物理B ›› 2007, Vol. 16 ›› Issue (8): 2400-2406.doi: 10.1088/1009-1963/16/8/041
• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇 下一篇
马慧1, 谭霞1, 仝殿民1, 樊锡君1, 田淑芬2
Ma Hui(马慧)a), Tan Xia(谭霞)a), Tian Shu-Fen(田淑芬)b), Tong Dian-Min(仝殿民)a), and Fan Xi-Jun(樊锡君)a)†
摘要: We have studied the effect of the spontaneously generated coherence (SGC) on gain of lasing without inversion (LWI) in a closed three-level $\Lambda $-type atomic system with Doppler broadening. It is shown that, regardless of the driving and probe fields being co- or counter-propagating, at a suitable value of the Doppler width, we can obtain a much larger LWI gain with SGC than that without SGC; and the region of the LWI gain spectrum with SGC is obviously larger than that without SGC. When the Doppler width takes a constant value, the gain does not monotonically decrease or increase with increasing strength of SGC, the largest LWI gain can be obtained by adjusting strength of SGC. Generally speaking, the co-propagating probe and driving fields is favourable to obtain a larger LWI gain.
中图分类号: (Photoionization and excitation)