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MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Controllable mode multistability in microring lasers.

Guohui Yuan1, Zhuoran Wang

  • 1State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China. yuanguohui@uestc.edu.cn

Optics Express
|April 24, 2013
PubMed
Summary
This summary is machine-generated.

This study explores mode multistability in microring lasers (MRLs), demonstrating control over lasing modes via optical injection. These findings enable self-sustained states for optical flip-flop functions.

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Area of Science:

  • Photonics and Laser Technology
  • Nonlinear Optics
  • Optical Communications

Background:

  • Microring lasers (MRLs) exhibit complex behaviors due to nonlinear optical effects.
  • Mode multistability, the coexistence of multiple lasing states, is crucial for advanced optical functionalities.
  • Understanding these states is key to developing novel photonic devices.

Purpose of the Study:

  • To theoretically and numerically investigate mode multistability in microring lasers.
  • To derive conditions for achieving mode multistable operation.
  • To demonstrate the potential for all-optical switching and data storage.

Main Methods:

  • Development of a nonlinear multimode model for MRLs.
  • Inclusion of nonlinear effects: carrier density pulsation, carrier heating, and spectral hole burning.
  • Theoretical analysis and numerical simulations of laser dynamics and optical injection effects.

Main Results:

  • Derived theoretical conditions for mode multistable operation in MRLs.
  • Demonstrated that external optical injection can select a specific lasing mode through gain saturation.
  • Showcased self-sustained state switching for an all-optical flip-flop function in a 50µm-radius MRL.

Conclusions:

  • Mode multistability in MRLs is achievable and controllable.
  • External optical injection offers a method for precise mode selection and stabilization.
  • MRLs with mode multistability are promising for all-optical signal processing and memory applications.