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Nonlinear coupling between axisymmetrically-polarized ultrashort optical pulses in a uniaxial crystal

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Title: Nonlinear coupling between axisymmetrically-polarized ultrashort optical pulses in a uniaxial crystal
Authors: Suzuki, Masato Browse this author
Yamane, Keisaku Browse this author →KAKEN DB
Oka, Kazuhiko Browse this author →KAKEN DB
Toda, Yasunori Browse this author →KAKEN DB
Morita, Ryuji Browse this author →KAKEN DB
Issue Date: 14-Jul-2014
Publisher: Optical Society
Journal Title: Optics Express
Volume: 22
Issue: 14
Start Page: 16903
End Page: 16915
Publisher DOI: 10.1364/OE.22.016903
PMID: 25090507
Abstract: Nonlinear propagation of focused axisymmetrically-polarized ultrashort optical pulses along the optic axis in a uniaxial crystal is investigated experimentally and theoretically. The energy transfer between an azimuthally-polarized pulse and a radially-polarized pulse is observed. To analyze the nonlinear propagation, a general paraxial equation with a third-order nonlinearity for axisymmetrically-polarized pulses in a uniaxial crystal is derived and the extended Stokes parameters (ESPs) based on cylindrical coordinates are newly-introduced. The simulation results by using this equation, providing the calculated ESPs, well explain our experimental observations: 1) the energy transfer is attributed to the four-wave-mixing effect, reflecting the overlapping between the axisymmetrically polarized modes, 2) the variations of the polarization defined from the ESPs are clarified to be affected by the self-and the cross-phase modulations, which make the effective propagation length long or short.
Rights: ©2014 Optical Society of America
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 森田 隆二

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