Single-shot terahertz pulse characterization via two-dimensional electro-optic imaging with dual echelons

Kim, Ki-Yong; Yellampalle, Balakishore; Taylor, Antoinette J.; Rodriguez, George; Glownia, J. H.

doi:10.1364/ol.32.001968

Cited by 84 publications

(38 citation statements)

References 13 publications

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“…While in the spatial encoding geometry [5] the THz field is typically too weak owing to the lack of THz focusing, the noncollinear cross-correlation geometry [6,7] is potentially complex owing to its intrinsic three-beam geometry (two laser probe beams plus the THz pulse) and two nonlinear processes (EO effect and frequency doubling). In another geometry (spatiotemporal mixing geometry [8]), two echelons are used to realize a temporal scan of the THz pulse. Note that spatial chirp could impose restrictions for shorter laser pulses ͑Ͻ50 fs͒.…”

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confidence: 99%

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Single-shot measurement of the spectral envelope of broad-bandwidth terahertz pulses from femtosecond electron bunches

Tilborg

Tóth²,

Matlis

et al. 2008

Opt. Lett.

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We present a new approach (demonstrated experimentally and through modeling) to characterize the spectral envelope of a terahertz (THz) pulse in a single shot. The coherent THz pulse is produced by a femtosecond electron bunch and contains information on the bunch duration. The technique, involving a single lowpower laser probe pulse, is an extension of the conventional spectral encoding method (limited in time resolution to hundreds of femtoseconds) into a regime only limited in resolution by the laser pulse length (tens of femtoseconds). While only the bunch duration is retrieved (and not the exact charge profile), such a measurement provides a useful and critical parameter for optimization of the electron accelerator.

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confidence: 99%

“…More recently it was shown [11] that the temporal resolution of this technique can be extended to FL by applying an algorithm to the spectral interference structure. However, the complex algorithm often produces unwanted numerical artifacts on the retrieved THz profile [8].…”

mentioning

confidence: 99%

Single-shot measurement of the spectral envelope of broad-bandwidth terahertz pulses from femtosecond electron bunches

Tilborg

Tóth²,

Matlis

et al. 2008

Opt. Lett.

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“…Single-shot THz-pulse characterization by dual echelon optics In the 2000s, dual echelon optics was first employed to single-shot THz diagnostics [29] . The main idea is to divide the transverse profile of a probe beam by stair-step (echelon) structures into multiple delayed beamlets, which are then focused onto the same spot on an EO crystal to monitor the phase modulation caused by a copropagating THz pulse.…”

Section: Coherent Detectionmentioning

confidence: 99%

Non-scanning systems for far-infrared radiation detection from laser-induced plasmas

Liao

2015

High Pow Laser Sci Eng

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With the development of ultraintense terawatt (TW) and petawatt (PW) laser systems, powerful terahertz (THz) radiation from laser-plasma interactions has been reported. Plasma-based THz systems, which are usually operated at extremely low repetition rates, call for single-shot diagnostics. In this paper, various state-of-the-art single-shot detection methods are introduced or designed for measurements and applications involved in high-power plasma-based THz sciences.Keywords: laser-plasma interaction; single-shot detection; terahertz radiation General review on THz detectorsNowadays, detection of radiation in the terahertz (THz) frequency domain is of great interest in active research [1,2] . Generally speaking, the methods involved can be mainly categorized into two types: incoherent (direct) detection and coherent detection. In order to meet the requirements of different applications, designs for specific THz radiation detection systems need to take the following three factors into account: (1) whether the system has sufficiently high sensitivity to allow signals to be extracted from thermal background radiation; (2) whether the data sampling rate allows real-time measurements of ultrafast processes; and (3) whether full characterization of the THz radiation, including amplitude and phase information, can be provided with no or little distortion. The last requirement cannot be achieved other than by using coherent detectors/methods.Spectral information is always considered essential in real applications. For applications that require very high spectral resolution within a known frequency region, heterodyne detection systems based on frequency mixing are preferred. At room temperature, a semiconductor-based detector, such as a planar Schottky-diode mixer, is combined with a local oscillator for frequency downconversion [3,4] . The created downshifted signal -the intermediate-frequency (IF) signal -is then filtered and amplified to obtain high sensitivity of detection, the noise equivalent power (NEP) of which Correspondence to: Y

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“…In this paper, we present a direct "spatial encoding" single-shot TTDS scheme by using an echelons pair proposed by Kim et.al. [7] …”

Section: Introductionmentioning

confidence: 99%

A Single-shot Terahertz Time-domain Spectroscopy Instrument for Intense Laser System

Jin

Wada

Shin

et al. 2016

J. Phys.: Conf. Ser.

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Single-shot terahertz pulse characterization via two-dimensional electro-optic imaging with dual echelons

Cited by 84 publications

References 13 publications

Single-shot measurement of the spectral envelope of broad-bandwidth terahertz pulses from femtosecond electron bunches

Single-shot measurement of the spectral envelope of broad-bandwidth terahertz pulses from femtosecond electron bunches

Non-scanning systems for far-infrared radiation detection from laser-induced plasmas

A Single-shot Terahertz Time-domain Spectroscopy Instrument for Intense Laser System

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