Miller R I, Roberts T G
Appl Opt. 1987 Nov 1;26(21):4570-5. doi: 10.1364/AO.26.004570.
The theory of self-focusing has been applied to beams propagating in the atmosphere. The effects of density variation, absorption, and air breakdown which limit the self-focusing through power driven instabilities are estimated. It is found that laser pulses whose pulse lengths are between 10 ns and 10 micros with powers from 10(2)P(c) to 10(3)P(c) have a chance to self-focus. Here P(c) is the critical power for self-focusing in an ideal nonattenuating medium with a nonlinear index of refraction.
自聚焦理论已应用于在大气中传播的光束。估计了通过功率驱动不稳定性限制自聚焦的密度变化、吸收和空气击穿的影响。发现脉冲长度在10纳秒至10微秒之间、功率从10²P(c)至10³P(c)的激光脉冲有自聚焦的机会。这里P(c)是在具有非线性折射率的理想无衰减介质中自聚焦的临界功率。
