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Related Concept Videos

Interference: Path Lengths01:10

Interference: Path Lengths

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

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Related Experiment Video

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

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Published on: April 1, 2020

Straight multimode interference phased array structure using periodic segmented waveguide phase array.

Muhammad A Othman1, Khaled Hassan, Diaa A Khalil

  • 1Ain Shams University, Electronics and Communication Engineering Department, Cairo, Egypt. muhammad.othman@exchange2000.francetelecom.fr

Applied Optics
|January 6, 2009
PubMed
Summary
This summary is machine-generated.

A novel multimode interference (MMI) phased array design uses periodic segmented waveguides to significantly reduce device size. This new structure offers a 23x size reduction for an 8-channel multiplexer with comparable performance.

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Published on: August 30, 2012

Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Waveguide Devices

Background:

  • Multimode interference (MMI) devices are crucial in integrated optics for beam splitting and combining.
  • Conventional MMI phased array structures often suffer from large footprints due to the need for delay arms and curved waveguides.
  • Minimizing the size of optical components is essential for high-density integration and advanced photonic systems.

Purpose of the Study:

  • To propose a new, compact design for multimode interference (MMI) phased array structures.
  • To reduce the physical size of MMI phased arrays without compromising optical performance.
  • To demonstrate the effectiveness of the proposed design using an 8-channel multiplexer example.

Main Methods:

  • The proposed design replaces traditional arrayed delay arms with periodic segmented waveguides.
  • This modification enables a straight-line structure, eliminating the need for curved waveguides.
  • The design was exemplified by an 8-channel multiplexer, a common configuration in optical communication.

Main Results:

  • The new MMI phased array structure achieves a significant size reduction, by a factor of 23 compared to conventional designs.
  • The performance of the proposed design remains comparable to existing MMI phased arrays.
  • The straight structure simplifies fabrication and integration.

Conclusions:

  • The integration of periodic segmented waveguides offers a viable strategy for miniaturizing MMI phased arrays.
  • This innovative design presents a significant advancement in reducing the footprint of optical multiplexers.
  • The proposed MMI phased array structure holds promise for next-generation compact photonic integrated circuits.