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Polarization-dependent encapsulated Dammann device under second Bragg illumination

ZHISEN HUANG1, BO WANG1,2,* , KUNHUA WEN1, ZIMING MENG1, ZHAOGANG NIE3, FANGTENG ZHANG1, XIANGJUN XING1, LI CHEN1, LIANG LEI1, JINYUN ZHOU1

Affiliation

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
  2. Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong University of Technology, Guangzhou 510006, China
  3. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, ChinaSchool of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guang

Abstract

A polarization dependent beam splitting encapsulated device under second Bragg angle is proposed. This grating device is mainly made of fused silica and silver plate, which can diffract the energy of TE polarized light and TM polarized light to 0th order and 2nd order, respectively, where the diffraction efficiency of both orders can reach 95% or more. In this design, a covering layer is introduced, which can improve the performance and protect the grating layer structure. For a given incident wavelength of 1550 nm and a period of 2962 nm, the rigorous coupled wave is used to optimize the thickness of the grating and the groove thickness of the grating. The results show that the polarization beam splitting grating can be accurately designed with high efficiency and high extinction ratio, whose optical characteristics can be applied to the optical communication industry.

Keywords

Beam splitting, Polarization dependence Under second Bragg illumination.

Citation

ZHISEN HUANG, BO WANG, KUNHUA WEN, ZIMING MENG, ZHAOGANG NIE, FANGTENG ZHANG, XIANGJUN XING, LI CHEN, LIANG LEI, JINYUN ZHOU, Polarization-dependent encapsulated Dammann device under second Bragg illumination, Optoelectronics and Advanced Materials - Rapid Communications, 15, 7-8, July-August 2021, pp.301-306 (2021).

Submitted at: Sept. 1, 2020

Accepted at: Aug. 16, 2021