Abstract
Optical parametric chirped pulse amplification with different pump wavelengths was investigated using LBO crystal, at signal central wavelength of 800nm. According to our theoretical simulation, when pump wavelength is 492.5nm, there is a maximal gain bandwidth of 190nm centered at 805nm in optimal noncollinear angle using LBO. Presently, pump wavelength of 492.5nm can be obtained from second harmonic generation of a Yb:Sr5(PO4)3F laser. The broad gain bandwidth can completely support ∼6fs with a spectral centre of seed pulse at 800nm. The deviation from optimal noncollinear angle can be compensated by accurately tuning crystal angle for phase matching. The gain spectrum with pump wavelength of 492.5nm is much better than those with pump wavelengths of 400, 526.5 and 532nm, at signal centre of 800nm.
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