High-energy soliton fission dynamics in multimode GRIN fiber

Zitelli, Mario; Mangini, Fabio; Ferraro, Mario; Niang, A.; Kharenko, D. S.; Wabnitz, Stefan

doi:10.1364/oe.394896

Cited by 38 publications

(35 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This allows for the observation of a host of unexpected nonlinear effects [18,20]. Specifically, the presence of photoluminescence and nonlinear losses, which were ascribed to a MPA mechanism, was recently reported in graded-index (GRIN) MMFs [21,22]. These nonlinear losses introduce a fundamental, and previously undisclosed, nonlinear limitation to the energy transmission capabilities of optical fibers, and may provide an intrinsic limitation for the power scaling of spatiotemporal mode-locking with multimode fiber lasers [23].…”

Section: Introductionmentioning

confidence: 96%

Multiphoton-Absorption-Excited Up-Conversion Luminescence in Optical Fibers

et al. 2020

Self Cite

View full text Add to dashboard Cite

We experimentally demonstrate a previously unforeseen nonlinear effect in optical fibers: upconversion luminescence generation excited by multiphoton absorption of femtosecond infrared pulses. We directly estimate the average number of photons involved in the up-conversion process, by varying the wavelength of the pump source. We highlight the role of non-bridging oxygen hole centers and oxygen deficient center defects, and directly compare the intensity of side-scattered luminescence with numerical simulations of pulse propagation.

show abstract

Section: Introductionmentioning

confidence: 96%

Multiphoton-Absorption-Excited Up-Conversion Luminescence in Optical Fibers

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Note that the generated multimode solitons feature very high (up to the MW range) peak powers, which permits to drastically improve the quality of the nonlinear imaging of biological samples via two-photon absorption (2PA) and three-photon absorption (3PA), when using infrared light. Because of multimode soliton dynamics and the associated spatiotemporal oscillations induced by selfimaging, dispersive wave generation is obtained, feeding the near-infrared spectrum between 700 nm and 1000 nm [37][38][39]. Additionally, we clearly observed geometric parametric instability (GPI) sidebands, leading to frequency conversion of the input pump into spectral anti-Stokes and Stokes sidebands with large (i.e.…”

Section: Resultsmentioning

confidence: 89%

“…Beyond this wavelength, which represents also the zero-dispersion wavelength (ZDW) of the LP01 mode, a part of the pulse energy propagates in the anomalous dispersion regime, which leads to soliton generation. As well-known, soliton propagation is subject to the Raman-induced soliton self-frequency shift, which leads to spectral broadening towards the 2 microns region [27][28][29][30][36][37][38][39][40]. Note that the generated multimode solitons feature very high (up to the MW range) peak powers, which permits to drastically improve the quality of the nonlinear imaging of biological samples via two-photon absorption (2PA) and three-photon absorption (3PA), when using infrared light.…”

Section: Resultsmentioning

confidence: 99%

“…This is the purpose of this Letter: we demonstrate that the spatiotemporal character of BSC leads to a significant resolution enhancement in multispectral-multiband multiphoton fluorescence imaging, in both microscopy and endoscopy configurations. This is obtained thanks to BSC-induced energetic broadband frequency conversion, activated by significant temporal pulse narrowing, and high-energy multimode soliton generation [27][28][29][30][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatiotemporal Beam Self-cleaning for High-resolution Nonlinear Fluorescence Imaging With Multimode Fiber

OULD-MOUSSA

Mansuryan

Hage

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Beam self-cleaning (BSC) in graded-index (GRIN) multimode fibers (MMFs) has been recently reported by different research groups. Driven by the interplay between Kerr effect and beam self-imaging, BSC counteracts random mode coupling, and forces laser beams to recover a quasi-single mode profile at the output of GRIN fibers. Here we show that the associated self-induced spatiotemporal reshaping allows for improving the performances of nonlinear fluorescence (NF) microscopy and endoscopy using multimode optical fibers. We experimentally demonstrate that the beam brightness increase, induced by self-cleaning, enables two and three-photon imaging of biological samples with high spatial resolution. Temporal pulse shortening accompanying spatial beam clean-up enhances the output peak power, hence the efficiency of nonlinear imaging. We also show that spatiotemporal supercontinuum (SC) generation is well-suited for large-band NF imaging in visible and infrared domains. We substantiated our findings by multiphoton fluorescence imaging in both microscopy and endoscopy configurations.

show abstract

“…In this work, we study the nonlinear effects due to the propagation of femtosecond pulses in different lengths of MM fiber with a graded-index (GRIN) core profile (50/125). In particular, for relatively short MM fiber lengths (i.e., 30 cm of GRIN fiber), we revealed a new type of high-energy pulse propagation regime, characterized by the presence of MM solitons, created by the fission of the initial femtosecond pulse [3]. We observed that these solitons have different amplitudes and wavelengths, but nearly equal time duration.…”

Section: Introductionmentioning

confidence: 84%

Spatiotemporal guided bullets in multimode fiber

Zitelli

Ferraro

Mangini

et al. 2021

Nonlinear Frequency Generation and Conversion: Materials and Devices XX

Self Cite

View full text Add to dashboard Cite

Beam self-imaging of ultrashort pulses in nonlinear graded-index (GRIN) multimode optical fibers is of interest for many applications, including spatiotemporal mode-locking in fiber lasers. We obtained a new analytical description for the nonlinear evolution of a laser beam of arbitrary transverse shape propagating in a GRIN fiber. The longitudinal beam evolution could be directly visualized by means of femtosecond laser pulses, propagating in the anomalous or in the normal dispersion regime, leading to light scattering out of the fiber core via the emission of blue photo-luminescence. As the critical power for self-focusing is approached and even surpassed, a host of previously undisclosed nonlinear effects is revealed, including strong multiphoton absorption by oxygen-deficiency center defects and Germanium inclusions, splitting and shifting of the self-imaging period, filamentation, and conical emission of the guided light bullets. We discovered that nonlinear loss has a profound influence on the process of high-order spatiotemporal soliton fission. The beam energy carried by the fiber is clamped to a fixed value, and nonlinear bullet attractors with suppressed Raman frequency shift and fixed temporal duration are generated, leading to highly efficient frequency conversion of the input near-infrared femtosecond pulses into mid-infrared multimode solitons.

show abstract

High-energy soliton fission dynamics in multimode GRIN fiber

Cited by 38 publications

References 28 publications

Multiphoton-Absorption-Excited Up-Conversion Luminescence in Optical Fibers

Multiphoton-Absorption-Excited Up-Conversion Luminescence in Optical Fibers

Spatiotemporal Beam Self-cleaning for High-resolution Nonlinear Fluorescence Imaging With Multimode Fiber

Spatiotemporal guided bullets in multimode fiber

Contact Info

Product

Resources

About