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A sun-pumped cw one-watt laser.

C G Young1

  • 1American Optical Company, Research Division, Southbridge, Massachusetts 01551, USA.

Applied Optics
|January 6, 2010
PubMed
Summary

Researchers achieved 1W of laser output at room temperature using a sun-pumped neodymium-doped YAG crystal. This demonstrates efficient solar-powered laser technology for potential applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Solar-pumped lasers offer a sustainable alternative to traditional power sources.
  • Neodymium-doped YAG (Neodymium-doped Yttrium Aluminum Garnet) and glass are established laser gain media.

Purpose of the Study:

  • To demonstrate sustained, high-power laser output using solar energy.
  • To investigate the performance of neodymium-doped YAG and glass under solar pumping.

Main Methods:

  • A water-cooled, neodymium-doped YAG laser rod was pumped using a modified Cassegrain sun-tracking telescope.
  • The telescope featured a 61-cm primary mirror and specialized secondary and tertiary mirrors.
  • Laser output was measured under natural sunlight conditions at 42 degrees North latitude.

Main Results:

  • 1 W of continuous laser output was achieved at room temperature from the YAG crystal.
  • Spike-free laser output was sustained for hours.
  • Approximately 1.25 W of pulsed output was obtained from an uncooled neodymium-doped glass rod.

Conclusions:

  • Sun-pumped neodymium-doped YAG lasers can achieve significant output power at room temperature.
  • Further optimization of telescope optics and laser crystals could enhance performance.
  • Space-based applications are feasible with improved designs and smaller collectors.

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