Two-output beam splitter with continuously adjustable splitting ratio based on phase grating

Abstract

In this paper, a new type of diffractive optical beam splitter, which is based on phase grating, is fabricated with binary optical technique and studied theoretically and experimentally. This type of beam splitter can split an incident beam into two beams with continuously adjustable splitting ratio from 0.08 to 11. The relation between the splitter structure and the splitting ratio is given by method of vector diagram. Experimental results are presented and confirm the validity of this type of beam splitter.