Temporal Reflection from Ultrashort Solitons in Nonlinear Dispersive Medium: Impact of Raman Scattering DOI Creative Commons
Govind P. Agrawal

Photonics, Journal Year: 2024, Volume and Issue: 11(12), P. 1189 - 1189

Published: Dec. 19, 2024

This review focuses on phenomena such as temporal reflection, total internal and waveguiding from ultrashort solitons forming inside a nonlinear dispersive medium an optical fiber. The case of wider solitons, moving at constant speed the fiber, is discussed first to introduce basic concepts. In short phenomenon intrapulse Raman scattering shifts their spectrum toward longer wavelengths decelerates them they propagate through These features lead several novel effects focusing by single variable-speed soliton. Recent experimental results are also in this context.

Language: Английский

Spatiotemporal Bragg gratings forming inside a nonlinear dispersive medium DOI
Junchi Zhang, William R. Donaldson, Govind P. Agrawal

et al.

Optics Letters, Journal Year: 2024, Volume and Issue: 49(20), P. 5854 - 5854

Published: Sept. 23, 2024

We show that a spatiotemporal Bragg grating can be created inside nonlinear dispersive medium (such as silica fibers) by launching periodic train of pump pulses travel fundamental solitons. develop theoretical model and use it to find the band structure such gratings. study interaction probe pulse with grating, both within outside momentum gaps. also photonic analog Anderson localization is possible when disorder introduced into grating.

Language: Английский

Citations

6
Higher-Order Raman Pure-Quartic Wave Trains in Optical Fibers DOI Creative Commons
Conrad Bertrand Tabi, Karabo Kefilwe Ndebele,

Hippolyte Tagwo

et al.

IntechOpen eBooks, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

This chapter addresses the effects of higher-order Raman scattering on modulational instability in optical fibers with pure-quartic dispersion. Low- and high-input power regimes are affected by self-frequency shift (SFS) and, due to presence quintic nonlinearity quartic dispersion, this leads extended zones gain spectrum. Here, we demonstrate via numerical simulations that our biharmonic nonlinear Schrödinger (NLS) equation exhibits ultrashort pulse trains, including rogue wave (RW)-like patterns, as well trains Akhmediev breathers (ABs). The can also lead a tunable strong Raman-induced frequency shift, allowing energy transfer between modes during signal propagation. work paves way for potential experimental characterization non-Kerr nonlinearities media.

Language: Английский

Citations

0
Raman soliton-induced time focusing and time-convex mirror in photonic crystal fiber DOI
Hongrui Wang, Jifang Rong, Saili Zhao

et al.

Optics Communications, Journal Year: 2025, Volume and Issue: unknown, P. 131713 - 131713

Published: March 1, 2025

Language: Английский

Citations

0
Temporal reflection from short pump pulses inside a dispersive nonlinear medium: Impact of pump parameters DOI
Junchi Zhang, William R. Donaldson, Govind P. Agrawal

et al.

Journal of the Optical Society of America B, Journal Year: 2024, Volume and Issue: 41(8), P. 1836 - 1836

Published: July 15, 2024

We have studied, through a series of experiments and numerical simulations, how temporal reflection from an intense pump pulse inside photonic crystal fiber is affected by parameters the used to form moving high-index boundary. femtosecond pulses, which slow down as their spectrum red-shifts because intrapulse Raman scattering. Temporal probe pulses occurs such decelerating pulses. changed width chirp our with 4f shaper capable providing both spectral filtering frequency chirping. found that refection exhibited novel features, knowledge, when were made wider or chirped. In cases, two more reflected produced at different wavelengths in specific range initial pump-probe delays. Numerical simulations reveal origin features related complex nonlinear evolution optical fibers.

Language: Английский

Citations

2
Spatiotemporal coupled-mode equations for arbitrary pulse transformation DOI Creative Commons
Zhaohui Dong, Xianfeng Chen, Luqi Yuan

et al.

Physical Review Research, Journal Year: 2023, Volume and Issue: 5(4)

Published: Nov. 13, 2023

Spatiotemporal modulation offers a variety of opportunities for light manipulations. In this paper, we propose way toward arbitrary transformation pulses sequentially propagating within one waveguide in space via temporal coupling. The coupling operation is achieved by spatiotemporally modulating the refractive index spatial with traveling wave through segmented electrodes. We derive coupled-mode equations and discuss how systematic parameters affect coefficients. further demonstrated Mach-Zehnder interferometer universal multiport interferometer, which enables unitary pulses. showcase approach transforming among coupled waveguides, requires only under spatiotemporal modulation, hence provide flexible, compact, highly compatible method optical signal processing time domain.

Language: Английский

Citations

2
Reflection and refraction of a super-Gaussian optical pulse at a moving temporal boundary DOI
Yichong Liu,

Haoyun Wu,

Jiajia Zhao

et al.

Optics Communications, Journal Year: 2023, Volume and Issue: 554, P. 130113 - 130113

Published: Nov. 7, 2023

Language: Английский

Citations

1
Temporal Reflection from Ultrashort Solitons in Nonlinear Dispersive Medium: Impact of Raman Scattering DOI Creative Commons
Govind P. Agrawal

Photonics, Journal Year: 2024, Volume and Issue: 11(12), P. 1189 - 1189

Published: Dec. 19, 2024

This review focuses on phenomena such as temporal reflection, total internal and waveguiding from ultrashort solitons forming inside a nonlinear dispersive medium an optical fiber. The case of wider solitons, moving at constant speed the fiber, is discussed first to introduce basic concepts. In short phenomenon intrapulse Raman scattering shifts their spectrum toward longer wavelengths decelerates them they propagate through These features lead several novel effects focusing by single variable-speed soliton. Recent experimental results are also in this context.

Language: Английский

Citations

0