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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Polarization splitter using horizontal slot waveguide.

Huijuan Zhang1, Ying Huang, Suchandrima Das

  • 1Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research), 11 Science Park Road, Singapore Science Park II, 117685, Singapore. zhangh@ime.a-star.edu.sg

Optics Express
|March 14, 2013
PubMed
Summary
This summary is machine-generated.

This study presents a compact polarization splitter utilizing horizontal slotted waveguides. It achieves high extinction ratios, making it suitable for polarization diversity circuits.

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Waveguide Technology

Background:

  • Polarization splitters are crucial components in optical communication systems.
  • Existing designs may face limitations in compactness and broadband performance.
  • Horizontal slotted waveguides offer unique properties for integrated photonic devices.

Purpose of the Study:

  • To design and experimentally realize a compact and efficient polarization splitter.
  • To leverage horizontal slotted waveguides for improved device performance.
  • To evaluate the splitter's performance across a broadband spectrum.

Main Methods:

  • Finite-difference-time-domain (FDTD) simulation for device design.
  • Experimental fabrication and characterization of the polarization splitter.
  • Utilizing a directional coupler composed of two horizontal slotted waveguides.

Main Results:

  • Achieved high extinction ratios of 14.1 dB (cross-port) and 16.8 dB (through-port).
  • Determined an optimal coupling length of 15 µm for the directional coupler.
  • Demonstrated a favorable extinction ratio response across the C + L broadband spectrum.

Conclusions:

  • The developed polarization splitter is compact, efficient, and broadband.
  • It is well-suited for integration into polarization diversity circuits.
  • The device shows promise for platforms employing horizontal slot waveguides.