Simultaneous nonlinear wavelength and mode conversion for high-brightness blue sources

被引：2

作者：

Lindberg, Robert ^{[1
]}

Liu, Xiao ^{[2
]}

Zukauskas, Andrius ^{[1
]}

Ramachandran, Siddharth ^{[2
]}

Pasiskevicius, Valdas ^{[1
]}

机构：

[1] Royal Inst Technol, Dept Appl Phys, Hannes Alfvens Vag 11, S-11419 Stockholm, Sweden

[2] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2021年 / 38卷 / 11期

关键词：

2ND-HARMONIC GENERATION; LIDAR; LIGHT;

D O I：

10.1364/JOSAB.436188

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate frequency doubling of focused Bessel-like higher order fiber modes in a one-dimensionally quasi-phase matched structured KTP crystal. A single higher-order fiber mode, LP0,7, was generated at 971 nm using a fiber optical parametric amplifier pumped by sub-nanosecond pulses at 1064 nm. Frequency doubling to 485.5 nm was achieved with a maximum conversion efficiency of 48%, which produced a highly structured blue beam without any brightness improvement with respect to the fundamental beam. By optimizing the phase mismatch, we also experimentally demonstrate clean on-axis conversion-resulting from cascaded chi((2)) : chi((2)) processes, which is in good agreement with our numerical simulations, that give rise to brightness enhancement. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：3491 / 3498

页数：8

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