Chinese Optics Letters, Vol. 16, Issue 8, 080502 (2018)
Beam combination at any angles with a multilayer grating
Ci Yin, Shiyao Fu, Yahui Zhang, Yanwang Zhai, Heng Zhou, and Chunqing Gao*
- School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
A scheme for beam combination at any angles employing a specially designed multilayer grating is proposed. Such a grating is able to convert noncoaxial laser beams to coaxial ones, and the combined beams are able to output along the normal line of the grating. The intensity and the phase structure of combined beams can also be controlled. The experiments are carried out by loading an encoded grating on a liquid-crystal spatial light modulator. The results agree well with the simulations. This method of beam combination with a multilayer grating serves to simplify the complexity of beam combination.