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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 7,
  • Issue 9,
  • pp. 815-818
  • (2009)

589-nm yellow laser generation by intra-cavity sum-frequency mixing in a T-shaped Nd:YAG laser cavity

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Abstract

To obtain high power 589-nm yellow laser, a T-shaped thermal-insensitive cavity is designed. The optimal power ratio of 1064- and 1319-nm beams is considered and the fundamental spot size distribution from the output mirror to the two laser rods are calculated and simulated, respectively. As a result, a 589-nm yellow laser with the average output power of 5.7 W is obtained in the experiment when the total pumping power is 695 W. The optical-to-optical conversion efficiency from the fundamental waves to the sum frequency generation is about 15.2% and the pulse width is 150 ns at the repetition rate of 18 kHz. The instability of the yellow laser is also measured, which is less than 2% within 3 h. The beam quality factors are M<sup>2</sup><sub>x</sub>=4.96 and M<sup>2</sup><sub>y</sub>= 5.08.

© 2009 Chinese Optics Letters

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