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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Published on: February 28, 2016

A translational polarization rotator.

David T Chuss1, Edward J Wollack, Giampaolo Pisano

  • 1NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA. David.T.Chuss@nasa.gov

Applied Optics
|October 4, 2012
PubMed
Summary
This summary is machine-generated.

We developed a free-space polarization modulator that rotates linear polarization by adjusting the distance between a circular polarizer and a mirror. This device effectively modulates polarization states across a 20% bandwidth.

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Area of Science:

  • Optics and Photonics
  • Electromagnetism

Background:

  • Polarization modulation is crucial for various optical applications.
  • Existing methods may have limitations in bandwidth or complexity.

Purpose of the Study:

  • To introduce a novel free-space polarization modulator.
  • To demonstrate a device capable of rotating linear polarization by controlling phase delay.

Main Methods:

  • Utilizing a circular polarizer composed of a quarter-wave plate and wire grid.
  • Employing a movable mirror to vary the distance behind the polarizer.
  • Introducing a variable phase between circular polarization components.

Main Results:

  • Demonstrated a prototype polarization modulator.
  • Achieved modulation of Stokes Q and U parameters.
  • Operated over a 20% bandwidth from 77 to 94 GHz.

Conclusions:

  • The developed device offers a simple yet effective method for polarization modulation.
  • The design allows for tunable polarization rotation proportional to phase delay.
  • Potential applications in millimeter-wave and terahertz technologies.