Femtosecond optical parametric oscillators synchronously pumped by Yb:KGW oscillator

  • K. Stankevičiūtė
  • I. Pipinytė
  • I. Stasevičius
  • J. Vengelis
  • G. Valiulis
  • R. Grigonis
  • M. Vengris
  • M. Bardauskas
  • L. Giniūnas
  • O. Balachninaite
  • R. C. Eckardt
  • V. Sirutkaitis
Keywords: nonlinear optics, optical parametric oscillator, synchronous pumping, femtosecond pulses, bichromatic emission, Yb, KGW laser


Three synchronously pumped optical parametric oscillators (SPOPO's) based on different nonlinear optical materials are used to show the viability of Yb:KGW lasers for generation of pump radiation. Periodically poled lithium niobate (PPLN) is a convenient nonlinear optical material to begin the investigation, and typical of PPLN interesting additional phenomena are observed. Optical parametric amplification proves to be a useful technique for establishing SPOPO operation in lithium triborate (LBO) and beta barium borate (BBO) with a lower gain than PPLN. Numerical modelling helps in the analysis of SPOPO performance and indicates possible directions for future development such as non-collinear propagation to mitigate group velocity differences. The compact construction and efficient operation of femtosecond Yb:KGW lasers provide a favourable source of pump radiation for SPOPO's in these preliminary investigations.
Nonlinear and Coherent Optics