Achromatic second harmonic generation: tunable ultraviolet pulses with sub-10 fs duration
作者： P. Baum , S. Lochbrunner , E. Riedle
关键词: Optoelectronics 、 Chirp 、 Fourier transform 、 Optical parametric amplifier 、 Second-harmonic generation 、 Ultraviolet 、 Optics 、 Energy conversion efficiency 、 Materials science 、 Achromatic lens 、 Deformable mirror
摘要: Tunable ultraviolet (UV) pulses shorter than 10 fs are generated by achromatic frequency doubling the output of a noncollinear optical parametric amplifier. We achieve first and second order phase matching with suitable two-prism sequence thereby increase natural bandwidth nonlinear crystal factor 80. Extremely broad UV spectra Fourier limit 2.9 in 360 µm thick BBO at conversion efficiency 20 %. The angular dispersion chirp highly stable is compensated prism sequence. By controlling higher deformable mirror we generate as short 7.1 fs.
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