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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A tunable polarization diversity silicon photonics filter.

Jing Zhang1, Huijuan Zhang, Shiyi Chen

  • 1Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research), Singapore Science Park II, Singapore 117685, Singapore. zhang_jing@nmc.a-star.edu.sg

Optics Express
|July 13, 2011
PubMed
Summary

A novel silicon waveguide optical filter with polarization diversity was developed. This filter achieves low polarization dependent loss (<0.5dB) across a wide wavelength range, enhancing optical communication performance.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Optical filters are crucial components in wavelength-division multiplexing (WDM) systems.
  • Polarization-dependent loss (PDL) in optical filters can degrade signal quality.
  • Silicon photonics offers a platform for miniaturized and cost-effective optical devices.

Purpose of the Study:

  • To demonstrate a tunable polarization diversity silicon waveguide based optical filter.
  • To minimize polarization dependent loss (PDL) in silicon optical filters.
  • To achieve high extinction ratios for improved signal isolation.

Main Methods:

  • Design and fabrication of a silicon waveguide based optical filter.
  • Implementation of a polarization diversity scheme.

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  • Characterization of filter performance, including insertion loss, PDL, and extinction ratio.

    • Main Results:

    • Achieved less than 0.5dB polarization dependent loss (PDL) from 1525nm to 1600nm.
    • Demonstrated an extinction ratio of more than 27dB.
    • Reported an insertion loss of 6.3dB for the polarization diversity circuits.

    Conclusions:

    • The demonstrated tunable polarization diversity silicon optical filter effectively minimizes PDL.
    • Silicon photonics is a viable platform for high-performance optical filters.
    • The filter's characteristics are suitable for advanced optical communication systems.