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Design of polarization-selective diffractive phase elements in a laser cavity.

J Liu1, B Y Gu, G Z Yang

  • 1Institute of Physics, Academia Sinica, PO Box 603, Beijing 100080, China. wangxh@aphy.iphy.ac.cn

Applied Optics
|March 8, 2008
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Summary

Researchers developed a novel laser cavity using birefringent diffractive phase elements. This design enables the simultaneous generation of two distinct laser modes with orthogonal polarizations and unique output patterns.

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Materials Science

Background:

  • Laser cavities typically generate single polarization modes.
  • Controlling polarization and spatial mode simultaneously presents a challenge.
  • Birefringent elements offer potential for polarization control.

Purpose of the Study:

  • To design and simulate a novel laser cavity for generating dual-polarized, spatially distinct laser modes.
  • To investigate the use of birefringent diffractive phase elements for mode control.
  • To achieve separate, tailored output profiles for each polarization mode.

Main Methods:

  • Numerical simulations of a laser cavity incorporating birefringent diffractive phase elements.
  • Modeling of light propagation and polarization within the cavity.
  • Analysis of output mode profiles and polarization states.

Main Results:

  • Successful simulation of a laser cavity generating two orthogonally polarized modes.
  • Demonstration of distinct spatial profiles (circular and square) for each mode.
  • Separate launch of the two modes from different end mirrors.

Conclusions:

  • The proposed laser cavity design effectively achieves polarization selectivity and spatial mode control.
  • Birefringent diffractive phase elements are suitable for creating complex laser modes.
  • This design offers a new pathway for generating tailored laser outputs for various applications.