Boubaha Boualem, Naidoo Darryl, Godin Thomas, Fromager Michael, Forbes Andrew, Aït-Ameur Kamel
Faculté de Physique, Université des Sciences et de la Technologie Houari Boumédiène, Algiers, Algeria.
Appl Opt. 2013 Aug 10;52(23):5766-72. doi: 10.1364/AO.52.005766.
In this paper, we explore theoretically and experimentally the laser beam shaping ability resulting from the coaxial superposition of two coherent Gaussian beams (GBs). This technique is classified under interferometric laser beam shaping techniques contrasting with the usual ones based on diffraction. The experimental setup does not involve the use of some two-wave interferometer but uses a spatial light modulator for the generation of the necessary interference term. This allows one to avoid the thermal drift occurring in interferometers and gives a total flexibility of the key parameter setting the beam transformation. In particular, we demonstrate the reshaping of a GB into a bottle beam or top-hat beam in the focal plane of a focusing lens.
在本文中，我们从理论和实验两方面探究了由两束相干高斯光束同轴叠加所产生的激光束整形能力。该技术归类于干涉型激光束整形技术，与基于衍射的传统技术形成对比。实验装置不使用某些双波干涉仪，而是使用空间光调制器来产生必要的干涉项。这使得人们能够避免干涉仪中出现的热漂移，并在设置光束变换的关键参数时具有完全的灵活性。特别是，我们展示了在聚焦透镜的焦平面上，将高斯光束整形为瓶形光束或平顶光束。
