Detailed investigation of intermodal four-wave mixing in SMF-28: blue-red generation from green

Pourbeyram, Hamed; Nazemosadat, Elham; Mafi, Arash

doi:10.1364/oe.23.014487

Cited by 48 publications

(40 citation statements)

References 38 publications

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“…Determining the optical dispersive properties of TALOFs is critical to the understanding of their linear and nonlinear characteristics, or in the continuous wave (CW) or pulsed laser operation, a few examples of which are as follows. For each mode labeled with an index i, the full form of β i (ω) over a broad frequency range is needed to determine the phase-matching wavelengths for the intermodal (nonlinear) four-wave mixing (FWM) process [50][51][52][53][54]. In some cases, the Taylor expansion of β(ω) around a central frequency of ω 0 and the corresponding local frequency derivatives, β (n) i = ∂ n ω β i | ω0 , are sufficient to characterize the dispersive properties of an optical fiber [48,49].…”

Section: Introductionmentioning

confidence: 99%

Group velocity distribution and short-pulse dispersion in a disordered transverse Anderson localization optical waveguide

Mafi

2019

Optical Fiber Technology

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We investigate the group velocity distribution of waveguide modes in the presence of disorder. The results are based on extensive numerical simulations of disordered optical waveguides using statistical methods. We observe that the narrowest distribution of group velocities is obtained in the presence of a small amount of disorder; therefore, the modal dispersion of an optical pulse is minimized when there is only a slight disorder in the waveguide. The absence of disorder or the presence of a large amount of disorder can result in a large modal dispersion due to the broadening of the distribution of the group velocities. We devise a metric that can be applied to the mode group index probability-density-function and predict the optimal level of disorder that results in the lowest amount of modal dispersion for short pulse propagation. Our results are important for studying the propagation of optical pulses in the linear regime, e.g., for optical communications; and the nonlinear regime for high-power short-pulse propagation. arXiv:1909.05928v2 [physics.optics]

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Section: Introductionmentioning

confidence: 99%

Group velocity distribution and short-pulse dispersion in a disordered transverse Anderson localization optical waveguide

Mafi

2019

Optical Fiber Technology

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“…There is one main difficulty in harnessing the multi-mode space, however. As illustrated in the first demonstration of intermodal nonlinear optics by Stolen et al in 1974 [16,17] and repeatedly confirmed by subsequent experimental investigations to date [18][19][20][21][22] nonlinear interactions between different spatial modes typically exhibit impractically narrow parametric gain bandwidths, limiting spectral or temporal tailoring of light, thereby constraining two crucial degrees of freedom in the process of exploiting the spatial degree of freedom. This narrow bandwidth obviates their utility for most known applications of parametric nonlinear interactions, such as multicasting classical communications signals [23], tailoring the joint-spectral amplitudes for quantum sources [24], or enabling ultrashort pulse nonlinear interactions, to name a few examples.…”

Section: Introductionmentioning

confidence: 94%

Intermodal group-velocity engineering for broadband nonlinear optics

Demas¹,

Rishøj²,

Liu³

et al. 2018

Photon. Res.

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Interest in the nonlinear properties of multi-mode optical waveguides has seen a recent resurgence on account of the large dimensionality afforded by the platform. However, a perceived fundamental limitation of intermodal parametric interactionsthat they are impractically narrowbandhas yet to be solved. Here we show that by engineering the relative group velocity within the discrete spatial degree of freedom, we can tailor the phase matching bandwidth of intermodal parametric nonlinearities. We demonstrate group-velocitytailored four-wave mixing between the LP0,4 and LP0,5 modes of a multi-mode fiber with unprecedented gain bandwidths (>60 nm at ~1550 nm). As evidence of the technological utility of this methodology, we seed this process to generate a high-peak-power wavelength-tunable fiber laser in the Ti:Sapphire wavelength regime. More generally, with the combination of intermodal interactions, which dramatically expand the phase matching degrees of freedom for nonlinear optics, and intermodal group velocity engineering, which enables tailoring the bandwidth of such interactions, we showcase a platform for nonlinear optics that can be broadband while being wavelength agnostic.

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“…To date, multimode dynamics in step-index fibers have been primarily limited to broadband intermodal four-wave mixing processes (e.g., [13], [22], [27], [42], [43], [61]). However, using longer pulses and particularly in the normal dispersion regime, we expect that step-index fibers should support a wider range of behaviors that involve other processes.…”

Section: ) Graded-indexmentioning

confidence: 99%

Multimode Nonlinear Fiber Optics: Massively Parallel Numerical Solver, Tutorial, and Outlook

Wright

Ziegler

Lushnikov

et al. 2018

IEEE J. Select. Topics Quantum Electron.

161

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Building on the scientific understanding and technological infrastructure of single-mode fibers, multimode fibers are being explored as a means of adding new degrees of freedom to optical technologies such as telecommunications, fiber lasers, imaging, and measurement. Here, starting from a baseline of single-mode nonlinear fiber optics, we introduce the growing topic of multimode nonlinear fiber optics. We demonstrate a new numerical solution method for the system of equations that describes nonlinear multimode propagation, the generalized multimode nonlinear Schrödinger equation. This numerical solver is freely available, implemented in MATLAB ® and includes a number of multimode fiber analysis tools. It features a significant parallel computing speed-up on modern graphical processing units, translating to orders-of-magnitude speed-up over the split-step Fourier method. We demonstrate its use with several examples in graded-and step-index multimode fibers. Finally, we discuss several key open directions and questions, whose answers could have significant scientific and technological impact.

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Detailed investigation of intermodal four-wave mixing in SMF-28: blue-red generation from green

Cited by 48 publications

References 38 publications

Group velocity distribution and short-pulse dispersion in a disordered transverse Anderson localization optical waveguide

Group velocity distribution and short-pulse dispersion in a disordered transverse Anderson localization optical waveguide

Intermodal group-velocity engineering for broadband nonlinear optics

Multimode Nonlinear Fiber Optics: Massively Parallel Numerical Solver, Tutorial, and Outlook

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