Full 3D modelling of pulse propagation enables efficient nonlinear frequency conversion with low energy laser pulses in a single-element tripler

被引:20
作者
Kardas, Tomasz M. [1 ]
Nejbauer, Michal [1 ,2 ]
Wnuk, Pawel [1 ,2 ,5 ]
Resan, Bojan [3 ,4 ]
Radzewicz, Czeslaw [1 ,2 ]
Wasylczyk, Piotr [1 ]
机构
[1] Univ Warsaw, Fac Phys, Inst Expt Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland
[2] Polish Acad Sci, Inst Phys Chem, Ul Kasprzaka 44-52, PL-01224 Warsaw, Poland
[3] Lumentum Switzerland AG, CH-8952 Schlieren, Switzerland
[4] Univ Appl Sci & Arts Northwestern Switzerland, Sch Engn, CH-5210 Windisch, Switzerland
[5] Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany
来源
SCIENTIFIC REPORTS | 2017年 / 7卷
关键词
GENERATION;
D O I
10.1038/srep42889
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Although new optical materials continue to open up access to more and more wavelength bands where femtosecond laser pulses can be generated, light frequency conversion techniques are still indispensable in filling the gaps on the ultrafast spectral scale. With high repetition rate, low pulse energy laser sources (oscillators) tight focusing is necessary for a robust wave mixing and the efficiency of broadband nonlinear conversion is limited by diffraction as well as spatial and temporal walk-off. Here we demonstrate a miniature third harmonic generator (tripler) with conversion efficiency exceeding 30%, producing 246 fs UV pulses via cascaded second order processes within a single laser beam focus. Designing this highly efficient and ultra compact frequency converter was made possible by full 3-dimentional modelling of propagation of tightly focused, broadband light fields in nonlinear and birefringent media.
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页数:7
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