光盘扫描高斯光束的研究

Investigation of the Gauss Beams in Optical Disk Systems

讨论了扫描光束对高斯参数扫描光点强度分布的影响；给出了高斯参数与中心峰值强度及光点直径的定量关系；展示出焦平面上的三维光强分布图；提出了光盘存贮中高斯参数的选择依据；有效利用无能，获得高性能扫描光点。

The influence of Gauss beams on the intensity distribution of the scanning beam spot isdiscussed.The selective mdthod of Gaussian parameter is presented.Three dimentional beam profiles on thefocal plane are showed.The central peak intensity and width of the beam spot are given.In this opticalsystem,the Gaussian parameter σ is 1.5～2.It's very important for an optical disk storage system thatGaussian parameter is selected correctly,then high central intensity and micro-beam-spot is acquired.Thesignal-to-noiseratio of the optical disk system is more than 50dB.