Generation of infrared supercontinuum radiation: spatial mode dispersion and higher-order mode propagation in ZBLAN step-index fibers

被引：24

作者：

Ramsay, Jacob ^{[1
]}

Dupont, Sune ^{[2
]}

Johansen, Mikkel ^{[1
]}

Rishoj, Lars ^{[3
]}

Rottwitt, Karsten ^{[3
]}

Moselund, Peter Morten ^{[4
]}

Keiding, Soren Rud ^{[1
]}

机构：

[1] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

[2] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[3] Tech Uni Denmark, DTU Foton, Dept Photon Engn, DK-2800 Lyngby, Denmark

[4] NKT Photon, DK-3460 Birkerod, Denmark

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 09期

关键词：

PHOTONIC CRYSTAL FIBER; 4.5; MU-M; OPTICAL-FIBERS; SPECTROSCOPY; MICROSCOPY; CONTINUUM;

D O I：

10.1364/OE.21.010764

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Using femtosecond upconversion we investigate the time and wavelength structure of infrared supercontinuum generation. It is shown that radiation is scattered into higher order spatial modes (HOMs) when generating a supercontinuum using fibers that are not single-moded, such as a step-index ZBLAN fiber. As a consequence of intermodal scattering and the difference in group velocity for the modes, the supercontinuum splits up spatially and temporally. Experimental results indicate that a significant part of the radiation propagates in HOMs. Conventional simulations of supercontinuum generation do not include scattering into HOMs, and including this provides an extra degree of freedom for tailoring supercontinuum sources. (C) 2013 Optical Society of America

引用

页码：10764 / 10771

页数：8

共 21 条

[1] Supercontinuum generation in ZBLAN fibers-detailed comparison between measurement and simulation [J].