Rohde R S, Buser R G
Appl Opt. 1979 Mar 1;18(5):698-704. doi: 10.1364/AO.18.000698.
A laboratory experiment has been carried out to determine the effect of index of refraction turbulence on thermal blooming for cw CO(2) laser radiation. The turbulence is generated by the forced mixing of two gases of different indices of refraction; helium and nitrogen. The thermal blooming is obtained by adding small amounts of propylene to the mixture. The construction of the test cell and methods of measuring the turbulence are discussed in detail. The experimental results are compared with the root-sum-squared (RSS) theory, i.e., that the blooming and turbulence effects may be considered separately and that the total beam area is given by A = (AO) + A(B) + A(T), where A(B) and A(T) are the increase in the time-averaged area of the beam due to blooming and turbulence. Agreement is excellent for the particular case considered.
已经进行了一项实验室实验，以确定折射率湍流对连续波CO(2)激光辐射热晕效应的影响。湍流是由两种具有不同折射率的气体（氦气和氮气）的强制混合产生的。通过向混合物中添加少量丙烯来获得热晕效应。详细讨论了测试池的构造和测量湍流的方法。将实验结果与方和根（RSS）理论进行了比较，即热晕和湍流效应可以分别考虑，并且总光束面积由A = (AO) + A(B) + A(T)给出，其中A(B)和A(T)分别是由于热晕和湍流导致的光束时间平均面积的增加。对于所考虑的特定情况，两者吻合得非常好。
