Abstract
A 50%-50% splitting ratio element is presented by the covering-layer grating. The novel grating introduces a covering layer
on the surface-relief grating, which can not only protect the grating surface but also improve the performance of a beam
splitter compared with the surface-relief grating. The beam splitter based on fused silica is optimized for the femtosecond
laser with high damage threshold. For different incident wavelengths and angles, the 50%-50% splitting ratio element
exhibits wideband properties, which are useful compared with most beam splitters operated for certain incident wavelength
or angle..
Keywords
Covering layer, Uniformity, Splitting ratio.
Citation
HAO PEI, BO WANG, SUFANG YIN, CHENGYUE SU, LI CHEN, LIANG LEI, JINYUN ZHOU, 50%-50% splitting ratio element by covering-layer grating, Optoelectronics and Advanced Materials - Rapid Communications, 11, 7-8, July-August 2017, pp.419-422 (2017).
Submitted at: May 4, 2014
Accepted at: Aug. 9, 2017