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Optica Publishing Group
  • 2017 Conference on Lasers and Electro-Optics Pacific Rim
  • (Optica Publishing Group, 2017),
  • paper s1590

High-Average-Power Operation of a 100-mJ-Class, Conductively Cooled, Q-switched Tm, Ho:YLF Laser

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A conductively cooled Tm, Ho:YLF laser capable of producing a pulse energy higher than 100 mJ was developed. The laser crystal was cooled to −80 °C in order to achieve low-threshold operation. In addition, the pumping density was optimized by using a simplified rate equation model for the Tm,Ho-codoped system so as to further reduce the laser threshold without decreasing the fractional population of the Ho upper-laser manifold in high power operations. As a result, the maximum average output power of 7.28 W was obtained at a pulse repetition frequency of 70 Hz. To the best of our knowledge, this is the highest average output power reported for a 100-mJ-class, conductively cooled, Q-switched 2 µm laser oscillator.

© 2017 Optical Society of America

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