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Two-frequency injection on a multimode vertical-cavity surface-emitting laser.

Hong Lin1, David W Pierce, Amod J Basnet

  • 1Department of Physics & Astronomy, Bates College, Lewiston, ME 04240, USA. hlin@bates.edu

Optics Express
|November 24, 2011
PubMed
Summary
This summary is machine-generated.

Two-frequency optical injection into a multimode vertical-cavity surface-emitting laser (VCSEL) induces polarization switching and instabilities. These effects depend on frequency detuning and injected power, with distinct regions mapped.

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Area of Science:

  • Optics and Photonics
  • Semiconductor Lasers

Background:

  • Vertical-cavity surface-emitting lasers (VCSELs) are crucial components in optical communication and sensing.
  • Understanding the behavior of multimode VCSELs under external optical injection is essential for advanced applications.

Purpose of the Study:

  • To experimentally investigate the effects of two-frequency optical injection on a multimode VCSEL.
  • To map the polarization switching (PS) phenomena and identify instability regions.

Main Methods:

  • Experimental study using a two-frequency optical injection setup.
  • Utilizing a second VCSEL as the source for optical injection.
  • Mapping the parameter space of frequency detuning versus injected power.

Main Results:

  • Polarization switching (PS) observed with and without frequency locking for small frequency detuning.
  • Two distinct types of instabilities identified outside the PS regime.
  • Detailed mapping of instability regions and PS boundaries for each transverse mode.

Conclusions:

  • Two-frequency optical injection significantly influences the polarization dynamics and stability of multimode VCSELs.
  • The observed phenomena are highly dependent on the interplay between frequency detuning and injected power.
  • The study provides a comprehensive map of operational regimes for controlled VCSEL behavior.