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Optical Engineering

Waveguide-based antireflection structure
Author(s): Zhongshu Zhu; Xun Li
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Paper Abstract

A waveguide-based antireflection structure is proposed. The device consists of two polarization rotators (PRs), two polarization-distinguished 90-deg phase delay units (PDUs), and a polarization beam combiner (PBC). The PR and PDU, providing the same function as a quarter wave plate in free-space optics, convert a linearly polarized light into a circularly polarized light. Upon reflection from an isotropic homogenous interface, the returned light is converted back into a linearly polarized light in its perpendicular direction. Through the PBC placed at the input port, the returned light is then redirected into a different port for further use or discard. Our three-dimensional mode-matching method-based simulation shows that, on the silicon-on-insulator waveguide platform, the total device length can be made as short as 10.5  μm.

Paper Details

Date Published: 1 April 2016
PDF: 5 pages
Opt. Eng. 55(4) 047101 doi: 10.1117/1.OE.55.4.047101
Published in: Optical Engineering Volume 55, Issue 4
Show Author Affiliations
Zhongshu Zhu, Wuhan National Lab. for Optoelectronics (China)
Huazhong Univ. of Science and Technology (China)
Xun Li, McMaster Univ. (Canada)
Huazhong Univ. of Science and Technology (China)

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