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Related Experiment Video

Updated: Jun 17, 2026

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Laser mode selection by internal reflection prisms.

L G Deshazer1, E A Maunders

  • 1Aerospace Group, Hughes Aircraft Company, Culver City, California 90230, USA.

Applied Optics
|January 9, 2010
PubMed
Summary
This summary is machine-generated.

Critical internal reflection (CIR) using prisms achieved narrow angular selectivity in a Nd: glass laser. This technique enabled precise angular mode selection, with two-dimensional control demonstrated using Lummer-Gehrcke plates.

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Area of Science:

  • Optics and Photonics
  • Laser Physics

Background:

  • Laser cavities require precise control over optical modes for optimal performance.
  • Traditional mode selection methods can be complex or limited in angular resolution.

Purpose of the Study:

  • To introduce and demonstrate a novel method for angular mode selection in lasers.
  • To achieve high reflectivity and selectivity using internal reflection near the critical angle.

Main Methods:

  • Utilized internal reflection prisms to exploit sharp angular reflectivity variations near the critical angle.
  • Implemented the critical internal reflection (CIR) technique within a Nd: glass laser cavity.
  • Employed orthogonal Lummer-Gehrcke plates for two-dimensional angular mode selection.

Main Results:

  • Successfully produced a narrow angular range of high reflectivity within the laser cavity.
  • Demonstrated effective angular mode selection in a Nd: glass normal laser.
  • Achieved two-dimensional angular mode selection, indicating versatile spatial control.

Conclusions:

  • The critical internal reflection (CIR) technique offers a simple and effective approach for angular mode selection in lasers.
  • This method provides high selectivity by leveraging the physics of total internal reflection.
  • The demonstrated two-dimensional control opens possibilities for advanced laser beam shaping and applications.