用空间光调制器产生贝塞尔光束的实验研究

Experimental research on Bessel beam by spatial light modulator

贝塞尔光束因其中心光强分布随传播距离不变的性质,被称为无衍射光束.实验上获得贝塞尔光束通常对仪器参量要求很高,且得到的贝塞尔光束一般为非理想贝塞尔光束.本文利用简单的空间光调制器设计了半周期空间光相位调制方案来获得贝塞尔光束,通过模拟和实验验证了此种方案的有效性.

Bessel beam is a new traveling light at the leading edge of optics-related physics. As its distribution is constant during traveling, Bessel beam is often named as non-diffraction beam. In ex- periments, the methods to produce Bessel beams always require precision optical instruments, and it is hard to obtain high quality Bessel beams. The new scheme based on half-phase modulation was pro- duced by spatial light modulator with simple configuration. The validity of our new method and the quality of the Bessel beam were verified by both Matlab program simulations and experiments.