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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1989),
  • paper WF3

Six-kilowatt copper vapor laser pumped Ti: sapphire oscillator

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Abstract

A 6-kHz copper vapor laser pumped Ti: sapphire oscillator has been demonstrated. Slope efficiencies of ~15% were achieved with short (~3-cm) flat-flat cavities and gain diameters of ~300 μm. The Ti: sapphire oscillator consists of a 2-cm long Ti: Al2O3 crystal with a 10- × 10-mm cross section. The crystal was AB coated at 5145 and 8000 Å. The copper vapor laser pump was provided by Metalaser Technologies, Inc., and delivered up to 20 W (all lines) at 8 kHz; 11.6 W of polarized pump power at 511 nm was available after removing the yellow lings at 578 nm; of this, up to 7.5 W was actually absorbed in the Ti: sapphire as pump power. For ail measurements the pump polarization was oriented along the Ti: sapphire c axis. Figure 1 presents the output power vs input pump power for three output reflectors of 60, 80, and 90%. These slope efficiencies and operating conditions are similar to those used by Schulz1 in copper vapor laser pumped Ti: sapphire experiments designed to amplify femtosecond pulse lengths.

© 1989 Optical Society of America

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