Soloviev Alexander A, Khazanov Efim A, Kozhevatov Ilya E, Palashov Oleg V
The Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia.
Appl Opt. 2007 Jun 20;46(18):3821-8. doi: 10.1364/ao.46.003821.
We present a novel, to the best of our knowledge, method for measuring the intensity profile of far-IR beams. The method is based on the measurements of nonstationary variation in optical thickness of a fused-silica plate heated by the studied radiation. The optical thickness is observed by means of a reflecting interferometer. Purpose-made experimental setup allows one to measure beams with an aperture of up to 60 mm with a spatial resolution of 1 mm. The accessibility of the utilized technologies and the possibility to easily increase the aperture are the major advantages of this approach. The probable area of application for the method is measurements of beams produced by powerful industrial far-IR lasers.
据我们所知，我们提出了一种测量远红外光束强度分布的新方法。该方法基于对由被研究辐射加热的熔融石英板光学厚度的非平稳变化的测量。通过反射干涉仪观察光学厚度。特制的实验装置能够测量孔径达60毫米、空间分辨率为1毫米的光束。所采用技术的可及性以及轻松增大孔径的可能性是该方法的主要优点。该方法可能的应用领域是对强大的工业远红外激光产生的光束进行测量。
