新型二元纯位相型波分复用器

New Type Phase-only Wavelength Division Multiplexer

应用杨-顾算法,只用两块纯位相片H_1和H_2来代替透镜、光栅等分立元件,提出一种新型纯位相型波分复用器件,H_1位相片的作用是使输出面H_2上强度分布达到设定所要求的那样,8个高斯子波按不同波长依次排列分布在不同位置,相互之间串话尽可能最小;H_2位相片的作用是对输出平面上强度满足要求的出射光进行相应调整,使其最好地耦合到各接收通道,单纯由纯位相调制的方法,来实现解复用器件分光、聚焦等综合功能.

Using Y-G algorism, substituting the descrete components such as gratings, and lenses by two binary phase-only elements H1 and H2, the new type phase-only wavelength division multiplexer (WDM) is designed. The phase modulation of H1 makes the intensity distribution on the output plane H2 satisfied to the design such that eight Gaussian beams are arrayed according to their wavelengths and their crosstalk is little. H2 transforms the wavefront of the output laser beam to couple well to each receiving channel. By only phase modulation, the demultiplexer, focusing etc. of the WDM are realized.