Distortion of femtosecond pulses in lenses. Wave optical description

Bor, Zs.; Horváth, Z. L.

doi:10.1016/0030-4018(92)90022-j

Cited by 100 publications

(45 citation statements)

References 5 publications

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“…Consider a beam consisting of several monochromatic components and that we are interested in the effect of their superposition in the vicinity of focus. Due to the chromatic aberration of the focusing element [75,76,130,[147][148][149], or because the different radii of the wave fronts, the focusing of each harmonic wave would be treated in a different coordinate system with different positions of the origin O. This is due to the wavelength dependence of the wave front radius R = R(ω), which is measured from plane of the exit pupil, which has a fixed place.…”

Section: IXmentioning

confidence: 99%

“…This is due to the wavelength dependence of the wave front radius R = R(ω), which is measured from plane of the exit pupil, which has a fixed place. Fortunately, in the treated cases, the position of the origin varies with wavelength only along the optical axis, depending on where the center of the Gaussian reference sphere is, so Z = Z(ω) depends on frequency [147]. For a treatment with one frame of reference, the origin corresponding to the case of a given angular frequency ω 0 is chosen (it is the carrier wave here, but could be any other), and the electric field in a point P is given in that corresponding coordinate system, with the axial coordinate Z 0 = Z(ω 0 ).…”

Section: IXmentioning

confidence: 99%

“…Following the steps detailed in textbooks or journal articles [90,143,146,147], it can be shown that the field distribution in point P close to the focus can be evaluated from (2.48), assuming the Gaussian amplitude form (2.49), giving…”

Section: IXmentioning

confidence: 99%

“…For ultrashort pulse focusing, it has been utilized both for precise numerical calculations and approximate solutions performed to obtain information on the pulse properties in the focal region [76,135,139,147,149,[159][160][161]. Such results have even been compared with experimental data providing very nice agreements [162,163].…”

Section: Pulsed Beam Propagationmentioning

confidence: 99%

“…To fulfill this condition, lenses are often avoided for focusing few-cycle pulses, because of their long-known distorting effects, especially the ones increasing pulse duration [75,147]. The first issue with lenses is that -as being refractive optics -the light passes through their material, which -due to dispersion -increases their temporal duration (see Section 2.2.1).…”

Section: Focusing Of Few-cycle Optical Pulses With Controlled Electrimentioning

confidence: 99%

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Phase and polarization changes of pulsed Gaussian beams during focusing and propagation

Major¹

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Section: IXmentioning

confidence: 99%

Section: IXmentioning

confidence: 99%

Section: IXmentioning

confidence: 99%

Section: Pulsed Beam Propagationmentioning

confidence: 99%

Section: Focusing Of Few-cycle Optical Pulses With Controlled Electrimentioning

confidence: 99%

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Phase and polarization changes of pulsed Gaussian beams during focusing and propagation

Major¹

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Simple devices for measuring complex ultrashort pulses

Trebino

Bowlan

Gabolde

et al. 2009

Laser & Photonics Reviews

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We describe experimentally simple, accurate, and reliable methods for measuring from very simple to potentially very complex ultrashort laser pulses. With only a few easily aligned components, these methods allow the measurement of a wide range of pulses, including those with time-bandwidth products greater than 1000 and those with energies of only a few hundred photons. In addition, two new, very simple methods allow the measurement of the complete spatio-temporal intensity and phase of even complex pulses on a single shot or at a tight focus.Side views of an ultrashort laser pulse focusing in the presence of spherical aberration and group-velocity dispersion (GVD) and measured by Pamela Bowlan using SEA TADPOLE. In the nine snapshots, the color indicates the actual pulse color vs. space and time before and after the focus. The white dots represent the pulse-front (the highest intensity for a given transverse coordinate). The fringes in the beam before the focus are due to spherical aberration, and the rainbow-like appearance is due to the GVD. A short pre-history of ultrashort-laser-pulse measurementIn the 1960s, researchers began generating laser pulses shorter than could be measured using electronic detectors, and the field of ultrashort-laser-pulse measurement was born. How to measure humankind's shortest events? The goal was (and still is) to measure the pulse electric field vs. time, that is, its intensity, I(t), and phase, φ(t):or, equivalently, in the frequency domain, the pulse spectrum, S(ω), and spectral phase, ϕ(ω):Ẽomitting the negative-frequency component of the pulse. In principle, a shorter event is necessary to make the measurement. But clearly no such event was available. Researchers quickly realized that the shortest event available was the event itself. Thus autocorrelation [1] was born. Autocorrelation involved splitting the pulse into two, spatially overlapping the two pulses in some instantaneously responding nonlinear-optical medium, such as a secondharmonic-generation (SHG) crystal (See Fig. 1), and variably delaying one pulse with respect to the other. A SHG crystal produces light at twice the frequency of the input

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3.3 Femtosecond excimer lasers and their applications

Szatmàri

Marowsky

Simon

Laser Systems, Part 1

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Distortion of femtosecond pulses in lenses. Wave optical description

Cited by 100 publications

References 5 publications

Phase and polarization changes of pulsed Gaussian beams during focusing and propagation

Phase and polarization changes of pulsed Gaussian beams during focusing and propagation

Simple devices for measuring complex ultrashort pulses

3.3 Femtosecond excimer lasers and their applications

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