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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Data Center Four-Channel Multimode Interference Multiplexer Using Silicon Nitride Technology.

Ophir Isakov1, Aviv Frishman1, Dror Malka1

  • 1Faculty of Engineering Holon, Institute of Technology (HIT), Holon 5810201, Israel.

Nanomaterials (Basel, Switzerland)
|March 27, 2024
PubMed
Summary

We developed a compact silicon nitride four-channel multiplexer using multimode interference (MMI) technology. This device efficiently transmits four O-band signals with low power loss, ideal for data centers.

Keywords:
WDMmultimode interferencemultiplexersilicon nitride

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Area of Science:

  • Photonics
  • Integrated Optics
  • Materials Science

Background:

  • Multimode interference (MMI) wavelength division multiplexing (WDM) devices are crucial for optical communication.
  • Conventional MMI multiplexers often have large footprints and high energy requirements.
  • Silicon nitride (Si3N4) offers advantages for integrated photonic devices.

Purpose of the Study:

  • To design a compact, energy-efficient four-channel MMI multiplexer.
  • To utilize silicon nitride (Si3N4) for improved performance and reduced footprint.
  • To enable efficient WDM in the O-band spectrum for data center applications.

Main Methods:

  • Design of a single-unit silicon nitride (Si3N4) MMI coupler.
  • Operation within the O-band spectrum (1270-1330 nm) with 20 nm channel spacing.
  • Integration of waveguide input and output tapers to minimize reflection.

Main Results:

  • Achieved a compact MMI coupler footprint with a propagation length of 22.8 µm.
  • Demonstrated 70% power efficiency for the four-channel multiplexer.
  • Observed low power losses (1.24-1.67 dB) and favorable fabrication tolerances.

Conclusions:

  • The proposed Si3N4 MMI multiplexer is suitable for O-band WDM transceivers in data centers.
  • This design offers potential for higher data bitrates with reduced energy consumption.
  • The compact footprint and efficient operation address limitations of conventional MMI devices.