An Optimal Design for Universal Multiport Interferometers

Authors: William R. Clements, Peter C. Humphreys, Benjamin J. Metcalf, W. Steven Kolthammer, Ian A. Walmsley

arXiv: 1603.08788v1 - DOI (physics.optics)
8 pages, 4 figures

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In the field of photonics, universal multiport interferometers have emerged as a powerful tool for implementing various linear transformations between multiple channels. These interferometers are composed of a regular mesh of beam splitters and phase shifters, making them easily fabricable using integrated photonic architectures and scalable for different applications. The current standard design for these interferometers is based on the work by Reck et al in 1994. However, in a recent study conducted by William R. Clements, Peter C. Humphreys, Benjamin J. Metcalf, W. Steven Kolthammer, and Ian A. Walmsley, a new design for universal multiport interferometers has been proposed that outperforms the Reck design in terms of efficiency and robustness to optical losses. This alternative arrangement of beam splitters and phase shifters not only occupies half the physical footprint of the Reck design but also exhibits significantly improved performance under challenging conditions. The researchers demonstrate that their optimized design offers enhanced capabilities for both classical and quantum photonics applications. By utilizing this new design, researchers and engineers can achieve more efficient implementation of linear transformations between multiple channels while minimizing space requirements and mitigating the impact of optical losses. Overall, this study presents an important advancement in the field of universal multiport interferometers, offering a refined approach that surpasses previous designs in terms of performance and practicality. The findings hold great promise for further advancements in classical and quantum photonics research and technology development; enabling researchers to leverage improved capabilities with minimized space requirements while reducing potential impacts from optical losses.
AI-generated keywords: Universal Multiport Interferometers Photonics Linear Transformations Efficiency Robustness

AI-generated Key Points

  • Universal multiport interferometers are a powerful tool for implementing linear transformations between multiple channels in photonics.
  • These interferometers are composed of beam splitters and phase shifters, making them easily fabricable using integrated photonic architectures.
  • The current standard design is based on the work by Reck et al in 1994.
  • A new design proposed by Clements et al outperforms the Reck design in terms of efficiency and robustness to optical losses.
  • The alternative arrangement occupies half the physical footprint of the Reck design and exhibits significantly improved performance under challenging conditions.
  • The optimized design offers enhanced capabilities for both classical and quantum photonics applications.
  • By utilizing this new design, researchers and engineers can achieve more efficient implementation of linear transformations while minimizing space requirements and mitigating the impact of optical losses.
  • This study presents an important advancement in universal multiport interferometers, surpassing previous designs in terms of performance and practicality.
  • The findings hold promise for further advancements in classical and quantum photonics research and technology development.
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Abstract: Universal multiport interferometers, which can be programmed to implement any linear transformation between multiple channels, are emerging as a powerful tool for both classical and quantum photonics. These interferometers are typically composed of a regular mesh of beam splitters and phase shifters, allowing for straightforward fabrication using integrated photonic architectures and ready scalability. The current, standard design for universal multiport interferometers is based on work by Reck et al (Phys. Rev. Lett. 73, 58, 1994). We demonstrate a new design for universal multiport interferometers based on an alternative arrangement of beam splitters and phase shifters, which outperforms that by Reck et al. Our design occupies half the physical footprint of the Reck design and is significantly more robust to optical losses.

Submitted to arXiv on 29 Mar. 2016

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