We report on the development of a widely tunable high power optical parametric oscillator (OPO) based on
a diode-pumped femtosecond Yb:KGW laser. The laser operates at a wavelength of 1030 nm and can produce up to
3.7 W of average power in 300 fs pulses at 61 MHz repetition rate. Owing to its high peak power (>200 kW) this
laser is well suited for the development of the OPO in the near-infrared spectral region. Design considerations of the
OPO are also discussed and include the choice of the nonlinear material, its dispersive characteristics, wavelength
tuning methods and operating wavelength ranges, phase-matching properties for accurate crystal design as well as
OPO pumping configuration.