Experimental investigation of the boundary wave pulse

Horváth, Z. L.; Klebniczki, J.; Kurdi, G.; Kovács, A. P.

doi:10.1016/j.optcom.2004.05.045

Cited by 22 publications

(16 citation statements)

References 4 publications

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“…7 we show the pulse for an ideal lens, that is, A 0, PTD 0, and GVD 0 and for the real achromatic lens, that is, A 1, PTD 1, and GVD 1 for two defocus positions: z −1250 μm and z 1250 μm from the paraxial focus, z 0 μm. The boundary pulse predicted theoretically and measured experimentally by Horváth et al [12][13][14] can be seen in Fig. 7.…”

Section: Resultsmentioning

confidence: 73%

Gauss-Legendre quadrature method used to evaluate the spatio-temporal intensity of ultrashort pulses in the focal region of lenses

2012

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We analyze the spatio-temporal intensity of sub-20 femtosecond pulses with a carrier wavelength of 810 nm along the optical axis of low numerical aperture achromatic and apochromatic doublets designed in the IR region by using the scalar diffraction theory. The diffraction integral is solved by expanding the wave number around the carrier frequency of the pulse in a Taylor series up to third order, and then the integral over the frequencies is solved by using the Gauss-Legendre quadrature method. The numerical errors in this method are negligible by taking 96 nodes and the computational time is reduced by 95% compared to the integration method by rectangles. We will show that the third-order group velocity dispersion (GVD) is not negligible for 10 fs pulses at 810 nm propagating through the low numerical aperture doublets, and its effect is more important than the propagation time difference (PTD). This last effect, however, is also significant. For sub-20 femtosecond pulses, these two effects make the use of a pulse shaper necessary to correct for second and higher-order GVD terms and also the use of apochromatic optics to correct the PTD effect. The design of an apochromatic doublet is presented in this paper and the spatio-temporal intensity of the pulse at the focal region of this doublet is compared to that given by the achromatic doublet.

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Section: Resultsmentioning

confidence: 73%

Gauss-Legendre quadrature method used to evaluate the spatio-temporal intensity of ultrashort pulses in the focal region of lenses

2012

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“…The aberrations also play a role in the spatiotemporal spreading of a pulse [18][19][20][21] but in microscope objectives these are highly corrected. There are other focused-pulse distortions such as an "X-shaped pulse" and the "forerunner pulse" that appear a certain distance from the focal plane [22][23][24][25][26][27]38]. Most of the papers published so far have studied the focusing of pulses by using the scalar diffraction theory and by assuming that the bandwidth of the pulse, Δω, is smaller than the frequency of the carrier, ω 0 , i.e., Δω∕ω 0 ≪ 1.…”

Section: Introductionmentioning

confidence: 99%

Temporal spreading generated by diffraction in the focusing of ultrashort light pulses with perfectly conducting spherical mirrors

et al. 2013

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We study femtosecond pulses at the focal plane of a perfectly conducting spherical mirror which is a dispersionless system, that is, it introduces no group velocity dispersion and no propagation time difference to the pulses after reflection. By using the scalar diffraction theory we will show that the neglected terms in the diffraction integral, when using the approximation of the bandwidth being smaller than the frequency of the carrier, have a significant influence on imaging if a laser pulse of a few femtoseconds is used in time-resolved imaging. The neglected terms introduce temporal spreading to extremely short pulses of a few optical cycles incident on the mirror, which avoids a fully compensated pulse, i.e., a one optical cycle pulse, at the focus of the mirror. The study in this paper also applies to refracting optical systems such as microscope objectives or lenses.

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“…The diffracted field is said to arise from the superposition of the direct and the boundary diffraction wave pulse. A later study [2] reported the experimental demonstration of the existence of the boundary wave pulse by measuring the modulated spectrum on the optical axis (caused by the two separate pulses) and the integrated radial intensity distribution of the diffracted field behind a circular aperture.…”

Section: Introductionmentioning

confidence: 99%

Directly recording diffraction phenomena in the time domain

Lõhmus¹,

Bowlan²,

Trebino³

et al. 2010

Lithuanian J. Phys.

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The wave-field produced by a ∼30 fs duration Ti:sapphire oscillator pulse behind a circular aperture and circular opaque disk is measured using the ultrashort-laser-pulse measurement technique, scanning SEA TADPOLE. The high spatial and temporal resolution of the measuring technique enables us to fully image the diffracted field behind the apertures and record the interference pattern produced by the so-called boundary diffraction wave pulses.

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Experimental investigation of the boundary wave pulse

Cited by 22 publications

References 4 publications

Gauss-Legendre quadrature method used to evaluate the spatio-temporal intensity of ultrashort pulses in the focal region of lenses

Gauss-Legendre quadrature method used to evaluate the spatio-temporal intensity of ultrashort pulses in the focal region of lenses

Temporal spreading generated by diffraction in the focusing of ultrashort light pulses with perfectly conducting spherical mirrors

Directly recording diffraction phenomena in the time domain

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