Nearly transform-limited sub-20-fs pulses at 1065 nm and > 10 nJ enabled by a flat field ultrafast pulse shaper

作者：Domingue S R^*; Bartels R A

来源：Optics Letters, 2015, 40(2): 253-256.

DOI：10.1364/OL.40.000253

Using a low-nonlinearity fiber and pulses from a nonlinear fiber amplifier seeded by a modelocked Yb-doped fiber oscillator, we generate 19-fs pulses centered at 1065 nm with 11.5 nJ of pulse energy (700 mW average power). The short (< 15 cm) 10-mu m core, polarization maintaining fiber minimizes deleterious nonlinear effects and eliminates fiber damage, while still producing pulse bandwidths well beyond the Yb gain bandwidth limit. A flat-field pulse shaper, utilizing a Plssl lens, compresses the pulse to within 92% of the transform-limited peak power. The total power transmission efficiency is as high as 67%, including fiber coupling losses and pulse shaper transmission, due to the novel pulse shaper design allowing the incorporation of a high-efficiency transmission grating.

• 出版日期2015-1-15