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Cylindrical vector beam multiplexer/demultiplexer using off-axis polarization control
Shuqing Chen1, Zhiqiang Xie1, Huapeng Ye2
1Institute of Microscale Optoelectronics, Shenzhen University, 518060, Shenzhen, China.
Light, Science & Applications
|November 3, 2021
Summary
Researchers developed a novel metasurface for cylindrical vector beam (CVB) multiplexing and demultiplexing. This breakthrough enables high-capacity optical communication by precisely controlling off-axis polarization.
Area of Science:
- Optics and Photonics
- Optical Communication
Background:
- Cylindrical vector beams (CVBs) offer potential for high-capacity optical communication.
- Existing methods for CVB coupling/separation are limited by the lack of effective off-axis polarization control.
Purpose of the Study:
- To develop a novel metasurface for efficient CVB multiplexing and demultiplexing.
- To enable advanced optical communication systems through precise polarization control.
Main Methods:
- Utilized a metal-dielectric-metal metasurface for off-axis polarization control.
- Leveraged spin-to-orbit interactions to independently modulate left- and right-handed circularly polarized components of CVBs.
- Exploited light path reversibility and vector mode conservation for simultaneous multiplexing/demultiplexing.
Main Results:
- Demonstrated broadband operation from 1310 to 1625 nm, compatible with wavelength-division-multiplexing.
- Achieved a four-channel CVB multiplexing communication with a transmission rate of 1.56 Tbit/s.
- Obtained a bit-error-rate of 10^-6 at -21.6 dBm receive power.
Conclusions:
- The developed metasurface provides an effective solution for CVB multiplexing/demultiplexing.
- This technology paves the way for high-capacity CVB communication systems.
- The approach integrates wavelength-division-multiplexing and polarization-division-multiplexing for enhanced performance.
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