Parametric characteristics for a broadband Gaussian beam in free space

Mao, Haidan; Zhao, Daomu

doi:10.1007/s00340-010-3920-2

Cited by 7 publications

(3 citation statements)

References 19 publications

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“…The obtained values were 29% and 35% for M‐ and S‐Pure PVDF‐HFP, respectively. The solution‐casting films showed a higher β‐phase fraction than the melt‐mixed, followed by compression molding composite films due to solvent‐induced crystallization 25 . The interaction between polymer and solvent can be proposed the formation of electroactive β‐phase.…”

Section: Resultsmentioning

confidence: 99%

“…The solution-casting films showed a higher β-phase fraction than the melt-mixed, followed by compression molding composite films due to solvent-induced crystallization. 25 The interaction between polymer and solvent can be proposed the formation of electroactive β-phase. Because DMAc solvent will be attracted the positively charged surface of PVDF-HFP, which induces alltrans planar conformation in a short segment of PVDF-HFP during the crystallization as schematically presented in Scheme 2.…”

Section: Phase Identification By Ftirmentioning

confidence: 99%

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A comparison of shear‐mixing and solvent‐induced on phase behavior, thermal and dielectric properties of PVDF‐HFP/MOF composites

Paramee

Guo

Bhalla

et al. 2022

J of Applied Polymer Sci

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The effects of processing techniques significantly alter on the electroactive β-phase, thermal, and dielectric behavior of polymer composites. The metalorganic framework filler (C 3 N 2 H 5 )(Mg(HCOO) 3 ), HImMg is prepared and introduced into poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) matrix using two distinguished methods: melt-mixing and solution-casting methods. The processing conditions are important in determining the dominant phase in PVDF-HFP. As a result of solvent-induced crystallization, the β-phase content of solution-cast composites containing 10% HImMg is 22% higher than that of melt-mixed composites. In both methods, the nucleating effect of HImMg particles increases the overall crystallinity of the polymer matrix and enhances the dielectric constant in composite films by improving the interfacial and dipolar polarization. Furthermore, the melt-mixed composites with 7 wt% HImMg demonstrate the highest dielectric constant of 17.8 at 1 kHz, showing an enhancement of 59% compared with that of pristine PVDF-HFP. Meanwhile, the dielectric loss is suppressed at 0.083. These findings suggest the possibility of enhancing composites' electroactive phase and dielectric properties without mechanical stretching or a large electrical field.

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Section: Resultsmentioning

confidence: 99%

Section: Phase Identification By Ftirmentioning

confidence: 99%

A comparison of shear‐mixing and solvent‐induced on phase behavior, thermal and dielectric properties of PVDF‐HFP/MOF composites

Paramee

Guo

Bhalla

et al. 2022

J of Applied Polymer Sci

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“…Increasing attention has been paid to broadband technology in high-power lasers: for example, the formation of a hot image from phase defects in high-power broadband laser beams [13] , parametric characteristics of a broadband beam in free space [14] , the smoothing effect through a dispersive wedge [15] , and a broadband beam modulated by a hard-edged aperture [16] have been studied. However, little attention has been paid to high-power broadband lasers passing through a Kerr medium with defects, whose refractive index is dependent on the wavelength.…”

Section: Introductionmentioning

confidence: 99%

Propagation characteristics of a high-power broadband laser beam passing through a nonlinear optical medium with defects

Chen

et al. 2013

High Pow Laser Sci Eng

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The intensity distributions of a high-power broadband laser beam passing through a nonlinear optical medium with defects and then propagating in free space are investigated based on the general nonlinear Schrödinger equation and the split-step Fourier numerical method. The influences of the bandwidth of the laser beam, the thickness of the medium, and the defects on the light intensity distribution are revealed. We find that the nonlinear optical effect can be suppressed and that the uniformity of the beam can be improved for a high-power broadband laser beam with appropriate wide bandwidth. It is also found that, under the same incident light intensity, a thicker medium will lead to a stronger self-focusing intensity, and that the influence of defects in the optical elements on the intensity is stronger for a narrowband beam than for a broadband beam.

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Average spreading and directionality of broadband partially coherent beam in non-Kolmogorov turbulence

Zhang

Wang

et al. 2011

Appl. Phys. B

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Parametric characteristics for a broadband Gaussian beam in free space

Cited by 7 publications

References 19 publications

A comparison of shear‐mixing and solvent‐induced on phase behavior, thermal and dielectric properties of PVDF‐HFP/MOF composites

A comparison of shear‐mixing and solvent‐induced on phase behavior, thermal and dielectric properties of PVDF‐HFP/MOF composites

Propagation characteristics of a high-power broadband laser beam passing through a nonlinear optical medium with defects

Average spreading and directionality of broadband partially coherent beam in non-Kolmogorov turbulence

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