Devir A D, Oppenheim U P
Appl Opt. 1977 Oct 1;16(10):2757-63. doi: 10.1364/AO.16.002757.
The phenomenon of passive Q-switching of a CO(2) laser by CH(3)F is observed experimentally and analyzed by the use of a set of rate equations which describe the energy transfer processes in the laser-absorber system. The parameters which appear in the laser rate equations are measured in a separate series of measurements under the actual lasing conditions which exist during the Q-switching experiment. The parameters of the absorber rate equations were verified in a separate cw saturation experiment. The result of the Q-switching experiment shows that the present model can give a good account of the dependence of the pulse width, pulse peak power, and the pulse period on the absorber pressure. It is found that cross relaxation in the absorber plays a crucial role in this dependence. Another result of this study is that the integrated intensity of the nu(3) band of CH(3)F is equal to 619 +/- 28 cm(-2) atm(-1) at 300 K.
通过实验观察了CH₃F对CO₂激光的被动调Q现象，并利用一组描述激光 - 吸收体系统中能量转移过程的速率方程进行了分析。激光速率方程中出现的参数是在调Q实验期间实际激光条件下单独的一系列测量中测得的。吸收体速率方程的参数在单独的连续波饱和实验中得到了验证。调Q实验结果表明，当前模型能够很好地解释脉冲宽度、脉冲峰值功率和脉冲周期对吸收体压力的依赖性。研究发现，吸收体中的交叉弛豫在这种依赖性中起着关键作用。本研究的另一个结果是，在300 K时，CH₃F的ν₃带的积分强度等于619±28 cm⁻² atm⁻¹。
