Broadband polarization beam splitter/combiner based on gradient waveguide directional coupler

US10551567B2 · kind B2 · utility

Assignee

• WUHAN RESEARCH INSTITUTE OF POSTS AND TELECOMMUNICATIONS · CN

Inventors

• Lei Wang · Singapore, SG
• Daigao Chen · Hubei, CN
• Xi Xiao · 红钢城街道, CN
• Miaofeng Li · 红钢城街道, CN
• Ying Qiu · 红钢城街道, CN

Key dates

• Filing date: Dec 7, 2016
• Grant date: Feb 4, 2020
• Expiry date: Dec 7, 2036

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01P5/185
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A broadband polarization beam splitter/combiner based on a gradient waveguide directional coupler, comprises a gradient waveguide directional coupler, a beam combining end (1), a curved waveguide (5), a TE mode end (6) and a TM mode end (7). The coupler consists of a straight end gradient waveguide (2) and a serial end gradient waveguide (3). The trend of change of the gradient waveguide (2) is opposite to the gradient waveguide (3), and a gap is provided between the gradient waveguide (2) and the gradient waveguide (3). The beam combining end (1) is connected with one end of the gradient waveguide (2), the other end of the gradient waveguide (2) is connected with one end of the curved waveguide (5), the other end of the curved waveguide (5) is connected with the TE end (6), and the waveguide (3) is connected with the TM end (7).