Multiple QPM Resonant Radiations Induced by MI in Dispersion Oscillating Fibers

Conforti, Matteo; Trillo, Stefano; Kudlinski, Alexandre; Mussot, Arnaud

doi:10.1109/lpt.2015.2507190

Cited by 14 publications

(13 citation statements)

References 24 publications

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“…Again, the NLSE indicates that the modulation of the GVD is the dominant effect (Fig. S2b,d), in agreement with previous studies of QPM-DW generation [27,29,31]. We expect that the GVD will also provide QPM for the QPM-DWs in the TE 20 mode.…”

Section: Qpm Mechanismsupporting

confidence: 91%

“…processes such as second harmonic generation and different frequency generation, and QPM can also be used to satisfy the phase-matching conditions for DW generation [27][28][29][30][31].…”

Section: Figmentioning

confidence: 99%

“…Indeed, the "Kelly sidebands" [43] seen in laser cavities and sidebands seen during soliton propagation in long-distance fiber links [44] are both examples of QPM-DWs. QPM has also been demonstrated for both modulation-instability as well as soliton-DW phasematching using width-oscillating fibers [27,29,31] and for fiber-Bragg gratings [45][46][47][48][49]. QPM has also been seen in Kerr frequency comb generation [50].…”

Section: Figmentioning

confidence: 99%

“…The periodic modulation of the waveguide can enable numerous QPM orders, both positive and negative, which can allow QPM-DW generation to the fundamental mode and to higher-order modes (circles), producing a spectrum with many peaks (e). Note: the index curvature is exaggerated to better show phase-matching.arXiv:1710.03821v2 [physics.optics] 7 Dec 2017 2 processes such as second harmonic generation and different frequency generation, and QPM can also be used to satisfy the phase-matching conditions for DW generation [27][28][29][30][31].Here we show that periodic modulations of the effective mode area can enable QPM of DW generation in photonic silicon nitride (Si 3 N 4 ) waveguides, enhancing the intensity of the supercontinuum in specific spectral regions determined by the modulation period. Experimentally, we utilize a sinusoidal modulation of the waveguide width to enable first-order QPM to the TE 20 mode.…”

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confidence: 99%

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Quasi-Phase-Matched Supercontinuum Generation in Photonic Waveguides

et al. 2018

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Supercontinuum generation in integrated photonic waveguides is a versatile source of broadband light, and the generated spectrum is largely determined by the phase-matching conditions. Here we show that quasi-phase-matching via periodic modulations of the waveguide structure provides a useful mechanism to control the evolution of ultrafast pulses during supercontinuum generation. We experimentally demonstrate quasi-phase-matched supercontinuum to the TE20 and TE00 waveguide modes, which enhances the intensity of the SCG in specific spectral regions by as much as 20 dB. We utilize higher-order quasi-phase-matching (up to the 16 th order) to enhance the intensity in numerous locations across the spectrum. Quasi-phase-matching adds a unique dimension to the design-space for SCG waveguides, allowing the spectrum to be engineered for specific applications. Supercontinuum generation (SCG) is a χ(3) nonlinear process where laser pulses of relatively narrow bandwidth can be converted into a continuum with large spectral span [1][2][3]. SCG has numerous applications, including self-referencing frequency combs [4][5][6], microscopy [7], spectroscopy [8], and tomography [9]. SCG is traditionally accomplished using bulk crystals or nonlinear fiber, but recently, "photonic waveguides" (on-chip waveguides produced using nanofabrication techniques) have proven themselves as a versatile platform for SCG, offering small size, high nonlinearity, and increased control over the generated spectrum [10][11][12][13][14][15][16][17][18][19]. The spectral shape and efficiency of SCG is determined by the input pulse parameters, the nonlinearity of the material, and the refractive index of the waveguide, which determines the phasematching conditions. Specifically, when phase-matching between a soliton and quasi-continuous-wave (CW) light is achieved, strong enhancements of the intensity of the supercontinuum spectrum can occur in certain spectral regions. These spectral peaks are often referred to as a dispersive waves (DWs) [2,[20][21][22], and they are often crucial for providing sufficient spectral brightness for many applications. The soliton-DW phase-matching condition is typically satisfied by selecting a material with a favorable refractive index profile and engineering the dimensions of the waveguide to provide DWs at the desired wavelengths [15,16]. However, there are limitations to the refractive index profile that can be achieved by adjusting only the waveguide cross-section. Quasi-phase-matching (QPM) takes a different approach, utilizing periodic modulations of the material nonlinearity to achieve an end-result similar to true phase-matching [23][24][25][26]. QPM is routinely employed to achieve high conversion efficiency for nonlinear * danhickstein@gmail.com FIG. 1.a,b) Quasi-phase-matching (QPM) of supercontinuum generation in on-chip photonic waveguides can be achieved via waveguide-width modulation (a) or claddingmodulation (b). c) When the effective index of the soliton in the TE00 mode ("soliton index") intersects the ...

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Section: Qpm Mechanismsupporting

confidence: 91%

“…processes such as second harmonic generation and different frequency generation, and QPM can also be used to satisfy the phase-matching conditions for DW generation [27][28][29][30][31].…”

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

mentioning

confidence: 99%

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Quasi-Phase-Matched Supercontinuum Generation in Photonic Waveguides

et al. 2018

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“…In periodic fibers, multiple quasi phase matched dispersive waves can also be observed thanks to the periodicity [43,44], following a completely different mechanism than the one presented here [43]. More generally, this work illustrates to remarkable robustness of fundamental solitons against various types of perturbations, and the extremely rich nonlinear dynamics that these perturbations can induce.…”

Section: Discussionmentioning

confidence: 58%

Emission of Dispersive Waves from Solitons in Axially Varying Optical Fibers

Kudlinski¹,

Mussot²,

Conforti³

et al. 2017

Handbook of Optical Fibers

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The possibility of tailoring the guidance properties of optical fibers along the same direction as the evolution of the optical field allows to explore new directions in nonlinear fiber optics. The new degree of freedom offered by axiallyvarying optical fibers enables to revisit well-established nonlinear phenomena, and even to discover novel short pulse nonlinear dynamics. Here we study the impact of meter-scale longitudinal variations of group velocity dispersion on the propagation of bright solitons and on their associated dispersive waves. We show that the longitudinal tailoring of fiber properties allows to observe experimentally unique dispersive waves dynamics, such as the emission of cascaded, multiple or polychromatic dispersive waves.

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