Spatiotemporal instability of femtosecond pulses in graded-index multimode fibers
Date
2017Source Title
IEEE Photonics Technology Letters
Print ISSN
1041-1135
Publisher
Institute of Electrical and Electronics Engineers Inc.
Volume
29
Issue
24
Pages
2195 - 2198
Language
English
Type
ArticleItem Usage Stats
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Abstract
We study the spatiotemporal instability generated by a universal unstable attractor in normal dispersion graded-index multimode fiber for femtosecond pulses for the first time. Experimentally observed spatiotemporal instability sidebands are 91-THz detuned from the pump wavelength of 800 nm. Detailed analysis carried out numerically by employing coupled-mode pulse propagation model. Numerically obtained results are well-aligned with experimental observations. Spatial evolution of the total field and spatiotemporal instability sidebands is calculated numerically, and for the input pulses of 200-fs duration, formation and evolution of spatiotemporal instability are shown in both spatial and temporal domains. Our results present the unique features of spatiotemporal instability, such as remarkable frequency shift with inherited beam shape of instability sidebands.
Keywords
Graded-index multimode fibersNonlinear fiber optics
Spatiotemporal pulse propagation
Ultra-short pulses
Electromagnetic pulse
Fibers
Stability
Ultrafast lasers
Ultrashort pulses
Formation and evolutions
Graded-Index Multimode fibers
Nonlinear Fiber-Optics
Normal dispersion
Pulse propagation model
Spatial evolution
Spatio-temporal instability
Spatiotemporal pulse
Multimode fibers
Permalink
http://hdl.handle.net/11693/37117Published Version (Please cite this version)
https://doi.org/10.1109/LPT.2017.2769343Collections
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