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Improvement of Laser Beam Profile Using Optical Fiber for Laser Pulse Thermal Diffusivity Measurements

  • Tetsuya Baba
  • Teruo Arai
  • Akira Ono

Abstract

Beam profiles of a YAG-laser, which was used as a pulse heat source of a laser pulse apparatus were measured with two methods. One is a two-dimensional profile measurement using a TV camera. Another is a new application of a thermographic technique to measure one-dimensional energy distributions of pulsed laser beams. Observed profiles of direct beams from the YAG-laser were too irregular to apply to a precise thermal diffusivity measurement by the laser pulse method. It was demonstrated that such irregular beams were converted to uniform beams after transmission through a step-index optical fiber.

Keywords

Optical Fiber Beam Profile Transmitted Beam Uniform Beam Pulse Laser Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Purdue Research Foundation 1989

Authors and Affiliations

  • Tetsuya Baba
    • 1
  • Teruo Arai
    • 1
  • Akira Ono
    • 1
  1. 1.Thermophysical Metrology DepartmentNational Research Laboratory of MetrologyTsukuba, IbarakiJapan

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