Applied Physics B

, Volume 88, Issue 1, pp 37–41 | Cite as

Mid-infrared ZGP OPO pumped by near-degenerate narrowband type-I PPKTP parametric oscillator

  • M. Henriksson
  • M. Tiihonen
  • V. Pasiskevicius
  • F. Laurell
Article

Abstract

The total pulse energy of the signal and idler in a near-degenerate type-I periodically poled KTiOPO4 (PPKTP) optical parametrical oscillator (OPO) was spectrally confined within a 2 nm spectral bandwidth at 2.13 μm. This was achieved by using a volume Bragg grating as the output coupler. Both the signal and the idler from the PPKTP OPO were then simultaneously used to pump a mid-infrared ZnGeP2 (ZGP) OPO. The 2 nm bandwidth was narrower than the ZGP crystal acceptance bandwidth and, thus, made efficient conversion in the second OPO possible. A total slope efficiency of 10% from 1.06 μm to the 3.5–5 μm region was demonstrated, generating 250 μJ in the mid-IR with only 3.6 mJ of 1.06 μm pump energy. This corresponds to a Nd:YAG pump to mid-IR conversion efficiency of 7%.

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • M. Henriksson
    • 1
    • 2
  • M. Tiihonen
    • 2
  • V. Pasiskevicius
    • 2
  • F. Laurell
    • 2
  1. 1.Department of Optronic SystemsFOI – Swedish Defence Research AgencyLinköpingSweden
  2. 2.Department of Applied PhysicsKTH – Royal Institute of TechnologyStockholmSweden

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