Temporal and polarization dependence of the nonlinear optical response of solvents

Zhao, Peng; Reichert, Matthew; Benis, Sepehr; Hagan, David J.; Stryland, Eric W. Van

doi:10.1364/optica.5.000583

Cited by 61 publications

(33 citation statements)

References 68 publications

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“…Measured values of the nonlinear refractive index were n2=1.9±0.1•10 -15 cm 2 /W for chloroform and n2=3.1±0.2•10 -14 cm 2 /W for CS2 that agree with values in literature measured at the same pulse width -30 ps [14,29]. Also, pulse width dependent measurements of both of these compounds has been presented in the literature [13,19] indicating the separation between the electronic and the molecular reorientation contributions.…”

Section: Methodssupporting

confidence: 87%

“…Through the years many different experimental methods have been implemented to study the NLO properties, such as degenerated four-wave mixing method [9], nonlinear ellipse rotation method [10], Mach-Zehnder interferometer [11], Beam-deflection method [12,13] and others. One of the most popular approaches to study organic materials for third-order NLO applications is by using the Z-scan method, firstly proposed by M. Sheik-Bahae group [14].…”

Section: Introductionmentioning

confidence: 99%

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Origin of the Kerr effect: investigation of solutions by polarization-dependent Z-scan

Mihailovs

Rutkis

2020

J. Opt. Soc. Am. B

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The nonlinear refractive index dependence on the incident light polarization state have been studied for pure chloroform and chloroform solutions of aminobenziliden-1,3indandione derivatives. Measurements were done with linearly, elliptically and circularly polarized light using an 8 ns and 30 ps pulse duration 1064 nm lasers. This allows us to separate electronic, molecular reorientation and thermo-optical components of the nonlinear refractive index. The refractive index variations with the change of laser pulse repetition rate were employed to identify the presence of the thermo-optical effect. Quantum chemical calculations of linear polarizability were used to estimate the magnitude of molecular reorientation induced refractive index changes for solvents and solutions. Overall, in this paper we have outlined various essential aspects that need to be taken into account to correctly interpret Z-san measurement results for organic solvents and solutions.

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Section: Methodssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Origin of the Kerr effect: investigation of solutions by polarization-dependent Z-scan

Mihailovs

Rutkis

2020

J. Opt. Soc. Am. B

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“…The coherence properties of the generated supercontinuum in the proposed PCFs are performed. It considers the addition of one photon per mode noise with a random phase, and it is evaluated within the first-order degree of coherence (Zhao et al 2018), given by:…”

Section: Supercontinuum Generation In Optimized Structuresmentioning

confidence: 99%

Supercontinuum generation in photonic crystal fibers infiltrated with tetrachloroethylene

Hoang

Nguyen

et al. 2021

Opt Quant Electron

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This study proposes a photonic crystal fiber made of fused silica glass, with the core infiltrated with tetrachloroethylene (C2Cl4) as a new source of supercontinuum (SC) spectrum. We studied numerically the guiding properties of the several different fiber structures in terms of characteristic dispersion, mode area, and attenuation of the fundamental mode. Based on the results, the structural geometries of three C2Cl4-core photonic crystal fibers were optimized in order to support the broadband SC generations. The first fiber structure with lattice constant 1.5 μm and filling factor 0.4 operates in all-normal dispersion. The SC with a broadened spectral bandwidth of 0.8–2 μm is generated by a pump pulse with a central wavelength of 1.56 μm, 90 fs duration and energy of 1.5 nJ. The second proposed structure, with lattice constant 4.0 μm and filling factor 0.45, performs an anomalous dispersion for wavelengths longer than 1.55 μm. With the same pump pulse as the first fiber, we obtained the coherence SC spectrum in an anomalous dispersion range with wavelength range from 1 to 2 μm. Meanwhile, the third selected fiber (lattice constant 1.5 μm, filling factor 0.55) has two zero dispersion wavelengths at 1.04 μm and 1.82 μm. The octave-spanning of the SC spectrum formed in this fiber was achieved in the wavelength range of 0.7–2.4 μm with an input pulse whose optical properties are 1.03 μm wavelength, 120 fs duration and energy of 2 nJ. Those fibers would be good candidates for all-fiber SC sources as cost-effective alternatives to glass core fibers.

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“…Систематизированные данные по зависимости n2 от длительности импульса для исследуемых жидкостей можно найти, например, в [14,15].…”

Section: приложение 1 расчет астигматизма вносимого при смещении фокunclassified

Laser-Induced Streams in Liquids Depending on Focusing Conditions of Pulse-Periodic Femtosecond Laser Radiation

Lavrentyev¹,

Solovyov²,

Shemyakin³

et al. 2019

PhChGD

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The paper is devoted to generation and observing quasi-stationary flows under the effect of the focused pulse-periodic femtosecond laser radiation on liquid solvents: water, heavy water, alcohols, ketones, chlormetanes. The mechanism inducing directional flows appears to be directional collapse of the gas bubbles produced by multiphoton dissociation in a focused laser beam. Formation of the flows had being observed with schlieren technique and or framing small gas bubbles illuminated by visible laser beam converted to the line. Absorption coefficients of focused and unfocused femtosecond laser radiation in the fluids were also measured. In experiments with laser pulses of 450 fs at 1.023 nm wavelength with pulse energy from 10 to 220 uJ and repetition rate 1.43 ÷ 10 kHz stationary flows of fluids were originated from the laser beam waist directed along or transversely (in most cases) to the laser beam. The streams along the laser axis in both directions were observed under low pulse power (10 ÷ 20 uJ) provided precise lens adjustment without astigmatism or self-focusing. The tests show that single beam waist of 10 ÷ 20 um in diameter and 100 ÷ 200 um long generates two narrow jets along the beam axis in both directions from the waist. Lens displacement transversely to the beam leads to splitting beam waist in two astigmatic foci. Both foci generate axial flows directed toward each other that collide in the gap between foci, forming synthetic transverse flow. The increase of the pulse energy and focal point intensity were followed by nonlinear selffocusing forming filament like beam waist up to 14 mm long. Repeating cycles of selffocusing and defocusing produce several energy deposition zones along the filament beam waist, each one generating separate streams along the beam axis. Colliding of the contradirected streams gave rise to complex flow pattern along and transversely to the beam axis.Key words: laser-induced flows in liquids, femtosecond laser, laser beam self-focusing, multiphoton dissociation, laser beam interaction with liquids, laser processing.Video frame of the established flow pattern in heavy water in self-focused beam waist of pulse-periodic femtosecond laser. The flow pattern is created by microbubbles of dissociated heavy water illuminated by green "laser sheet". Intense contra-directed streams injected along laser beam collide and spread around forming streaks apart from the laser beam axis. Laser pulse duration and energy:  = 450 fs, 125 p E  J/pulse, repetition rate r = 3.33 kHz. Frame size 9  5 mm 2 . Laser beam is directed from left to right; focuser f-number is 17 f .

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Temporal and polarization dependence of the nonlinear optical response of solvents

Cited by 61 publications

References 68 publications

Origin of the Kerr effect: investigation of solutions by polarization-dependent Z-scan

Origin of the Kerr effect: investigation of solutions by polarization-dependent Z-scan

Supercontinuum generation in photonic crystal fibers infiltrated with tetrachloroethylene

Laser-Induced Streams in Liquids Depending on Focusing Conditions of Pulse-Periodic Femtosecond Laser Radiation

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