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P olarization independent grating with a connecting layer for three port output of incident laser beam

WENHUA ZHU1, BO WANG1,* , WENHAO SHU1, SUFANG YIN1, HAO PEI1, LI CHEN1, LIANG LEI1, JINYUN ZHOU1

Affiliation

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

Abstract

A three port p olarization independent beam splitter is described by the grating with a connecting layer between the grating region and the substrate. Such a novel diffractive three port beam splitter is optimi zed to achieve high diffraction efficiency with good uniformity. With the optimized grating para meters, efficiencies of 32.03%/ 32.06% and 32.14% 32.14%/32.15% can be separated into the 1st and the 0th orders for TE and TM polarizations, respectively. Besides, th e usual duty cycle of 0.5 and the aspect ratio of the grating depth to the ridge width of 1.83 facilitate the fabrication compared with reported gratings..

Keywords

Three port beam splitter, Connecting layer grating, Polarization independence.

Citation

WENHUA ZHU, BO WANG, WENHAO SHU, SUFANG YIN, HAO PEI, LI CHEN, LIANG LEI, JINYUN ZHOU, P olarization independent grating with a connecting layer for three port output of incident laser beam, Optoelectronics and Advanced Materials - Rapid Communications, 11, 9-10, September-October 2017, pp.505-507 (2017).

Submitted at: May 11, 2017

Accepted at: Oct. 10, 2017