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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CA3_4

High Energy 125mJ Ho:YAG (2.09 µm) MOPA Double Pass Laser System Pumped by cw Thulium Fiber Laser (1.9 µm)

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Abstract

2.09 µm Ho-lasers resonantly pumped by 1.9 µm Tm-Lasers are attractive candidates for pumping mid-infrared optical parametric oscillator and generator materials to drive applications in the 3 µm to 5 µm spectral range. At 1.908 µm there is a maximum in the absorption spectrum of the Ho3+ Ions and a minimum in the absorption spectrum of water. Pumping near the emission wavelength yields a high quantum efficiency and a small thermal load of the laser active material. The thulium fiber lasers used as pump sources were additionally equipped with beam profile homogenizers to realize appropriate excitation profiles in the 3-level Ho:YAG-laser rods similar to the pump scheme described in [1].

© 2011 Optical Society of America

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