Directly recording diffraction phenomena in the time domain

Lõhmus, Madis; Bowlan, Pamela; Trebino, Rick; Valtna-Lukner, Heli; Piksarv, Peeter; Saari, Peeter

doi:10.3952/lithjphys.50105

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…The U G (P, ω) and U B (P, ω) are given correspondingly by equations ( 5) and (7). u B (P, t) and u G (P, t) are the main and boundary wave pulses [4].…”

Section: The Boundary Wave For a Gaussian Pulsementioning

confidence: 99%

“…The propagation of an ultrashort pulse exposes it to many such distortions, of which some remain rather surprising. For example, even a simple circular aperture creates a trailing pulse that, in the case of femtosecond laser pulses, is quite distinguishable from the main pulse [4][5][6][7][8][9]. As a result, detailed investigation of ultrashort pulse propagation and focusing is also of fundamental interest in fields that require focusing them, including nonlinear optics, lithography, micro-machinery, biology, and medicine.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Diffraction of ultrashort Gaussian pulses within the framework of boundary diffraction wave theory

Piksarv¹,

Bowlan²,

Lõhmus³

et al. 2011

J. Opt.

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We study the diffraction of Gaussian pulses and beams within the framework of boundary diffraction wave theory. For the first time the boundary diffraction wave theory is applied to pulsed Gaussian beams, and it is shown that the diffracted field of a pulsed Gaussian beam on a circularly symmetric aperture can be evaluated by a single 1D integration along the diffracting aperture at every point of interest. We compare theoretical simulations to experimental measurements of ultrashort pulses diffracted off a circular aperture, an opaque disc, an annular aperture, and a system of four concentric annular apertures. Using the recently developed SEA TADPOLE measurement technique, we obtain micron spatial and femtosecond temporal resolutions in the spatio-temporal measurements of the diffracted fields.

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“…The U G (P, ω) and U B (P, ω) are given correspondingly by equations ( 5) and (7). u B (P, t) and u G (P, t) are the main and boundary wave pulses [4].…”

Section: The Boundary Wave For a Gaussian Pulsementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Diffraction of ultrashort Gaussian pulses within the framework of boundary diffraction wave theory

Piksarv¹,

Bowlan²,

Lõhmus³

et al. 2011

J. Opt.

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show abstract

Measuring the seemingly immeasurable

Trebino

2011

Nature Photon

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Highly reliable measurement of ultrashort laser pulses

Trebino

Jafari

Aktürk

et al. 2020

Journal of Applied Physics

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The past 30 years have seen spectacular progress in the development of techniques for measuring the complete temporal field, and even the complete spatiotemporal field, of ultrashort laser pulses. The challenge has been to measure a pulse without the use of a shorter event or an independent known reference pulse, neither of which is typically available. We begin with autocorrelation, the first such “self-referenced” pulse-measurement method ever proposed, which measures only a rough pulse length, and we describe its limitations. One such limitation is the presence of a somewhat unintuitive “coherent artifact,” which occurs for complicated pulses and also when averaging over a train of pulses whose shapes vary from pulse to pulse. We then describe the most important modern techniques capable of measuring the complete temporal intensity and phase of even complicated ultrashort pulses, as well as their ability (or inability) to measure such unstable pulse trains. A pulse reliably measured with such a device can then be used as a reference pulse in conjunction with another technique, such as spectral interferometry or holography, to measure pulses otherwise unmeasurable by a self-referenced technique. Examples include techniques for measuring low-intensity pulse(s) and for measuring the complete spatiotemporal intensity and phase of arbitrary pulse(s). This Tutorial is limited to well-established, proven methods, but other methods whose description proves instructive will be discussed.

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Directly recording diffraction phenomena in the time domain

Cited by 3 publications

References 11 publications

Diffraction of ultrashort Gaussian pulses within the framework of boundary diffraction wave theory

Diffraction of ultrashort Gaussian pulses within the framework of boundary diffraction wave theory

Measuring the seemingly immeasurable

Highly reliable measurement of ultrashort laser pulses

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