Investigation of supercontinuum generation in photonic crystal fiber using bursts of femtosecond pulses

Vengelis, Julius; Kuliešaitė, Miglė; Jukna, Vytautas; Jarutis, Vygandas; Sirutkaitis, Valdas

doi:10.1016/j.optcom.2021.127132

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…The numerical simulations also unveiled how the temporal dynamics of the pulse, and the second pulse in the burst, in particular, change when the pulse energy increases, which could not be retrieved by simple means experimentally. These results are in contrast with burst-mode SC generation in photonic crystal fiber 46 , where the pulse intensities are well below that produce multiphoton absorption and ionization effects as well as formation of STEs, and thus only a weak dependence of SC characteristics on temporal delay between the driving pulses was observed.…”

Section: Discussioncontrasting

confidence: 66%

Supercontinuum generation in bulk solid-state material with bursts of femtosecond laser pulses

Momgaudis,

Marčiulionytė,

Jukna

et al. 2024

Sci Rep

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We report on experimental and numerical investigation of burst-mode supercontinuum generation in sapphire crystal. The experiments were performed using bursts consisting of two 190 fs, 1030 nm pulses with intra-burst repetition rates of 62.5 MHz and 2.5 GHz from an amplified 1 MHz Yb:KGW laser and revealed higher filamentation and supercontinuum generation threshold for the second pulse in the burst, which increases with the increase of intra-burst repetition rate. The experimental results were quantitatively reproduced numerically, using a developed model, which accounted for altered material response due to residual excitations remaining after propagation of the first pulse. The simulation results unveiled that residual free electron plasma and self-trapped excitons contribute to elevated densities of free electron plasma generated by the second pulse in the burst and so stronger plasma defocusing, significantly affecting its nonlinear propagation dynamics. The presented results identify the fundamental and practical issues for supercontinuum generation in solid-state materials using femtosecond pulse bursts with very high intra-burst repetition rates, which may also apply to the case of single pulses at very high repetition rate, where residual material excitations become relevant and should be accounted for.

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Section: Discussioncontrasting

confidence: 66%

Supercontinuum generation in bulk solid-state material with bursts of femtosecond laser pulses

Momgaudis,

Marčiulionytė,

Jukna

et al. 2024

Sci Rep

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show abstract

“…The hollow core of a PCF, on the other hand, is also possible [ 8 , 9 , 10 , 11 , 12 , 13 ]. PCFs have been used in a variety of applications, including dispersion [ 14 , 15 , 16 ], supercontinuum production [ 17 , 18 , 19 ], birefringence [ 20 ], optofluidics [ 21 ], wavelength conversion [ 22 , 23 ] and sensing [ 24 , 25 ]. A typical numerical aperture of PCFs is NA = 0.5–0.6 [ 26 , 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Calculation of Bandwidth of Multimode Step-Index Polymer Photonic Crystal Fibers

Drljača¹,

Savović

Kovačević

et al. 2021

Polymers

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By solving the time-dependent power flow equation, we present a novel approach for evaluating the bandwidth in a multimode step-index polymer photonic crystal fiber (SI PPCF) with a solid core. The bandwidth of such fiber is determined for various layouts of air holes and widths of Gaussian launch beam distribution. We found that the lower the NA of SI PPCF, the larger the bandwidth. The smaller launch beam leads to a higher bandwidth for short fibers. The influence of the width of the launch beam distribution on bandwidth lessens as the fiber length increases. The bandwidth tends to its launch independent value at a particular fiber length. This length denotes the onset of the steady state distribution (SSD). This information is useful for multimode SI PPCF applications in telecommunications and optical fiber sensing applications.

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Watt-level ultra-flat wideband supercontinuum generation in GeO2 fiber by femtosecond pulse

Li,

Yang,

Yang

et al. 2024

Infrared Physics & Technology

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Investigation of supercontinuum generation in photonic crystal fiber using bursts of femtosecond pulses

Cited by 3 publications

References 48 publications

Supercontinuum generation in bulk solid-state material with bursts of femtosecond laser pulses

Supercontinuum generation in bulk solid-state material with bursts of femtosecond laser pulses

Calculation of Bandwidth of Multimode Step-Index Polymer Photonic Crystal Fibers

Watt-level ultra-flat wideband supercontinuum generation in GeO2 fiber by femtosecond pulse

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