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Encoding and decoding of orbital angular momentum for wireless optical interconnects on chip.

Dengke Zhang1, Xue Feng, Yidong Huang

  • 1State Key Laboratory of Integrated Optoelectronics, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.

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Summary

Orbital angular momentum (OAM) beams enhance on-chip wireless optical interconnects by doubling data density. This method offers a simple way to boost data capacity without complex technology upgrades.

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Area of Science:

  • Optoelectronics
  • Optical Communications
  • Nanophotonics

Background:

  • On-chip optical interconnects are crucial for high-performance computing.
  • Increasing data density in these interconnects is a key challenge.
  • Orbital angular momentum (OAM) offers a potential solution for multiplexing data.

Purpose of the Study:

  • To propose and demonstrate a scheme for encoding and decoding data using OAM beams in wireless optical interconnects on chip.
  • To investigate the feasibility of using OAM as an additional dimension for data transmission.
  • To assess the impact of OAM on data density and compatibility with existing architectures.

Main Methods:

  • Numerical simulation of a proposed structure for generating and manipulating OAM beams.
  • Encoding and decoding of data using multiple OAM orders at a single frequency.
  • Analysis of the achieved data density increase.

Main Results:

  • Generation of beams with OAM orders ranging from -3 to 4.
  • Successful encoding and decoding of data using OAM orders 0 to 3.
  • Achieved a twofold increase in data density.

Conclusions:

  • OAM can significantly increase data density in wireless optical interconnects.
  • The proposed method is compatible with existing architectures and does not require complex technology.
  • The theoretical potential for OAM orders is infinite, suggesting vast scalability.