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Related Concept Videos

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Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Published on: August 30, 2012

Compact waveguide splitter networks.

Yusheng Qian1, Jiguo Song, Seunghyun Kim

  • 1Electrical and Computer Engineering, Brigham Young University, Provo, UT 84602, USA.

Optics Express
|June 11, 2008
PubMed
Summary

We developed compact trench-based splitter networks (TBSNs) in silicon-on-insulator waveguides. These networks utilize novel 105-degree trench-based splitters (TBSs) for efficient optical signal division.

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Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Silicon-on-insulator (SOI) technology is crucial for integrated photonic circuits.
  • Efficient and compact waveguide splitters are essential components for optical signal distribution.
  • Traditional 90-degree splitter designs present fabrication challenges for high aspect ratio structures.

Purpose of the Study:

  • To demonstrate compact waveguide splitter networks using trench-based splitters (TBSs) and bends (TBBs) in SOI rib waveguides.
  • To investigate the performance of novel 105-degree TBSs for improved fabrication and 50/50 splitting.
  • To realize compact 1x4, 1x8, and 1x32 trench-based splitter networks (TBSNs).

Main Methods:

  • Utilized silicon-on-insulator (SOI) rib waveguides.
  • Designed trench-based splitters (TBSs) and bends (TBBs) with a 105-degree geometry.
  • Employed three-dimensional (3D) finite difference time domain (FDTD) simulations for design optimization.
  • Fabricated and measured the optical efficiencies and total loss of the splitter networks.

Main Results:

  • Achieved measured optical efficiencies of 84% for TBBs and 68% for TBSs.
  • Demonstrated compact 1x4, 1x8, and 1x32 trench-based splitter networks (TBSNs).
  • The 1x32 TBSN exhibited a total optical loss of 9.15 dB within a compact area of 700 µm x 1600 µm.

Conclusions:

  • Novel 105-degree trench-based splitters enable reliable fabrication of high aspect ratio trenches for efficient optical splitting.
  • Compact trench-based splitter networks (TBSNs) are successfully demonstrated in SOI rib waveguides.
  • The developed TBSNs offer a promising solution for integrated photonic applications requiring efficient and space-saving optical signal distribution.