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Journal of Applied Spectroscopy

, Volume 73, Issue 2, pp 285–291 | Cite as

Eye-safe radiation source based on an optical parametric oscillator

  • A. I. Vodchits
  • V. I. Dashkevich
  • N. S. Kazak
  • V. K. Pavlenko
  • V. I. Pokryshkin
  • I. P. Petrovich
  • V. V. Rukhovets
  • A. S. Kraskovskii
  • V. A. Orlovich
Article

Abstract

We have studied an optical parametric oscillator (OPO) with an unstable telescopic cavity, placed inside the cavity of an actively Q-switched multimode Nd3+:KGW pump laser. We used a KTP crystal as the nonlinear medium for the OPO. We have compared the emission characteristics of OPOs with unstable telescopic and planar cavities. We have established that compared with the planar cavity, the unstable cavity reduces the OPO beam divergence and improves the spatial distribution of the radiation energy in the far wave zone. Based on our investigations, we have designed a compact eye-safe (λ = 1.578 µm) laser source with natural cooling, emitting (for electrical pumping energy 7.3 J) pulses with pulse energy 22 mJ and pulse duration 6 nsec. The FWHM beam divergence for the source is no greater than 3.5 mrad.

Key words

eye-safe radiation intracavity optical parametric oscillator unstable telescopic cavity KTP crystal Nd:KGW pump laser 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • A. I. Vodchits
    • 1
  • V. I. Dashkevich
    • 1
  • N. S. Kazak
    • 1
  • V. K. Pavlenko
    • 1
  • V. I. Pokryshkin
    • 2
  • I. P. Petrovich
    • 2
  • V. V. Rukhovets
    • 2
  • A. S. Kraskovskii
    • 2
  • V. A. Orlovich
    • 1
  1. 1.B. I. Stepanov Institute of PhysicsNational Academy of Sciences of BelarusMinsk
  2. 2.Peleng OAOMinskBelarus

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