Nistor L C, Nistor S V, Teodorescu V, Cojocaru E, Mih Ilescu I N
Appl Opt. 1979 Oct 15;18(20):3517-21. doi: 10.1364/AO.18.003517.
An experimental arrangement is devised by which the absorption coefficient of low-loss materials can be measured by calorimetry using pulsed CO(2) lasers. The values obtained for long rod KCl samples are compared with those inferred when a cw CO(2) laser was used as radiation source. The values measured in the pulsed regime are little affected by the quality of the end sample surfaces and are close to the values corresponding to bulk absorption. Such behavior is explained as due to the essential role of the radiation process in dissipating the surface absorbed heat.
设计了一种实验装置，通过该装置可以使用脉冲CO(2)激光通过量热法测量低损耗材料的吸收系数。将长棒状KCl样品获得的值与使用连续波CO(2)激光作为辐射源时推断的值进行比较。在脉冲模式下测量的值受样品端面质量的影响很小，并且接近对应于体吸收的值。这种行为被解释为是由于辐射过程在消散表面吸收热量方面的重要作用。
