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Related Concept Videos

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

288
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.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
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Demultiplexing-free ultra-compact WDM-compatible multimode optical switch assisted by mode exchanger.

Siwei Liu1,2, Xin Fu1, Jiaqi Niu1

  • 1Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China.

Nanophotonics (Berlin, Germany)
|December 5, 2024
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Summary
This summary is machine-generated.

This study introduces a compact, demultiplexing-free silicon optical switch using micro-rings and mode exchangers for enhanced link capacity. It demonstrates high-speed data transmission, paving the way for efficient on-chip optical interconnects.

Keywords:
mode-division multiplexingon-chip optical interconnectsoptical switchsilicon photonics

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Semiconductor Devices

Background:

  • Silicon-based optical switches are crucial for on-chip optical interconnects.
  • Mode-division multiplexing (MDM) increases optical switch link capacity but traditional designs are complex and bulky.
  • Existing multimode optical switches often rely on Mach-Zehnder interferometer (MZI) structures and mode (de)multiplexers, leading to large footprints.

Purpose of the Study:

  • To propose and experimentally demonstrate a novel demultiplexing-free dual-mode 3x3 thermal-optical switch.
  • To achieve a compact and efficient optical switch design for on-chip applications.
  • To enable separate routing of TE0 and TE1 modes using micro-rings and mode exchangers.

Main Methods:

  • Utilized micro-rings (MRs) designed for TE1 mode and mode exchangers (MEs) to convert TE0 to TE1 mode.
  • Employed Bezier curves for optimizing MEs and dual-mode waveguide bends (45° and 90°) for compact layout.
  • Integrated multiple wavelength channels and spacings by adding MR pairs for WDM compatibility.

Main Results:

  • Demonstrated an ultra-compact switch footprint of 0.87 x 0.52 mm².
  • Achieved insertion losses below 8.7 dB at 1551 nm and optical signal-to-noise ratios (OSNRs) exceeding 13.0 dB.
  • Validated high-speed transmission capability through 32 Gbps data transmission experiments.

Conclusions:

  • The proposed demultiplexing-free dual-mode switch offers a compact and efficient solution for on-chip optical interconnects.
  • The design exhibits strong WDM compatibility and high-speed data transmission capabilities.
  • This technology advances the development of next-generation optical routing devices.