Article

Applied Physics B

, Volume 71, Issue 1, pp 19-25

First online:

Passively mode-locked high-power Nd:YAG lasers. with multiple laser heads

  • G.J. SpühlerAffiliated withUltrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg – HPT, 8093 Zürich, Switzerland (Fax: +41-1/633-1059, E-mail: spuehler@iqe.phys.ethz.ch)
  • , T. SüdmeyerAffiliated withUltrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg – HPT, 8093 Zürich, Switzerland (Fax: +41-1/633-1059, E-mail: spuehler@iqe.phys.ethz.ch)
  • , R. PaschottaAffiliated withUltrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg – HPT, 8093 Zürich, Switzerland (Fax: +41-1/633-1059, E-mail: spuehler@iqe.phys.ethz.ch)
  • , M. MoserAffiliated withCentre Suisse d’Electronique et de Microtechnique-Zürich, Badenerstrasse 569, 8048 Zürich, Switzerland
  • , K.J. WeingartenAffiliated withTime-Bandwidth Products, Inc., Technoparkstrasse 1, 8005 Zürich, Switzerland
  • , U. KellerAffiliated withUltrafast Laser Physics, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH Hönggerberg – HPT, 8093 Zürich, Switzerland (Fax: +41-1/633-1059, E-mail: spuehler@iqe.phys.ethz.ch)

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Abstract.

We discuss power scaling of passively mode-locked lasers using multiple laser heads in the resonator. We experimentally compared two different approaches for the cavity design, both using three side-pumped Nd:YAG laser heads. We obtained a record-high average output power of up to 27 W with close to diffraction-limited beam quality, a pulse duration of 19 ps, a pulse energy of 0.5 μJ, and 23 kW peak power. Single-pass second-harmonic generation in a 10-mm-long LBO crystal yields 16.2 W of 532-nm radiation.

PACS: 42.55.Xi; 42.60.Fc