Electro-optic sampling of optical pulses and electron bunches for a compact THz-FEL source

Wu, Bihu; Zhang, Zhe; Cao, Lei; Fu, Qiang; Xiong, Yongqian

doi:10.1016/j.infrared.2018.06.014

Cited by 11 publications

(11 citation statements)

References 28 publications

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“…An InAs/GaAs Quantum-Dot (QD) Laser Source [77] can be ultracompact, tunable in room temperature and its experimental setup involves a QD based photomixer resonantly pumped by a compact, broadly-tunable dual-wavelength QD laser in the double-grating quasi-Littrow configuration. A high peak power THz source for ultrafast electron diffraction was constructed operating at the wavelength ranging between 50-200µm [78] [79]. Fig 2 shows model of a device, which consisted of electron source and terahertz low-gain free electron laser (THz-FEL) oscillator [80] [82].…”

Section: A the Thz Sourcesmentioning

confidence: 99%

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

Ren

Zahid

Fan

et al. 2019

Trends in Food Science & Technology

119

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Past few years have witness a dramatic change in the field of terahertz (THz) technology. The recent advancements in the technology for generation, manipulation and detection exploiting THz radiation have brought revolution in the field. Many researchers around the world have been inspired by the potential of invaluable new applications of THz sensing for food and water contamination detection. The microbial pollution in water and food is one the crucial issues with regard to the sanitary state for drinking water and daily consumption of food. To address this risk, the detection of microbial contamination is of utmost importance since the consumption of insanitary or unhygienic food can lead to catastrophic illness. This paper presents a first-time review of the open literature focused on the advances in the THz sensing for microbiological contamination of food and water and state-of-theart network architectures, applications, industrial trends and recent developments. Finally, open challenges and future research directions are presented with in the field.

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Section: A the Thz Sourcesmentioning

confidence: 99%

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

Ren

Zahid

Fan

et al. 2019

Trends in Food Science & Technology

119

View full text Add to dashboard Cite

show abstract

“…To test the performance of the system we investigated the transmission of various crystals with features in the 0.1-10 THz range [18,19]. The crystals were placed between THz emission and detection.…”

Section: Resultsmentioning

confidence: 99%

“…where we introduce the optical dielectric constant at high frequencies ∞ and S 0 , f 0 and Γ 0 as the oscillator strength, eigenfrequency and damping constant, respectively. The corresponding material parameters [18] The calculated transmission following equation 2 is also shown in Figure 3 for the four samples, using dashed lines.…”

Section: Resultsmentioning

confidence: 99%

Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses for high repetition rate, low pulse energy lasers

Suter¹,

Tomasino²,

Savoini³

et al. 2022

Preprint

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We report the coherent generation and detection of terahertz (THz) pulses covering the bandwidth of 0.1-9 THz in a high repetition rate, low pulse energy laser system. In this work we demonstrate the application and evaluation of solid-state biased coherent detection in combination with a spintronic emitter. This combination was used to generate and detect THz pulses in a time-domain spectroscopy (TDS) setup and tested on bulk nonlinear crystals. These results establish a new promising candidate to extend the possibilities for compact, broadband THz TDS systems driven by high repetition rate lasers.

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“…It is important to note that DEOS is fundamentally different from previous techniques aiming at retrieving the input field using numerical analysis of the EO data (deconvolution 11 , and holography-inspired reconstructions 10 ). The presence of zeros (nulls) in the transfer functions H 1 (Ω) and H 2 (Ω) limits the success of reconstruction methods that do not use the phase diversity technique to relatively narrowband signals, or short analysis windows, if there is no a priori information on properties of the solution.…”

Section: Discussionmentioning

confidence: 99%

“…This major issue has been the subject of active investigations during the last two decades. Deconvolution algorithms have only led to limited improvements 10 , 11 , and most research switched to alternate hardware strategies, such as encoding the information onto the transverse or angular direction 12 – 16 , or combining spectrally decoded electro-optic sampling with advanced laser pulse characterization techniques (such as FROG) 17 , 18 . This led to improvements of the temporal resolution.…”

Section: Introductionmentioning

confidence: 99%

Phase Diversity Electro-optic Sampling: A new approach to single-shot terahertz waveform recording

et al. 2022

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Recording electric field evolution in single-shot with THz bandwidth is needed in science including spectroscopy, plasmas, biology, chemistry, Free-Electron Lasers, accelerators, and material inspection. However, the potential application range depends on the possibility to achieve sub-picosecond resolution over a long time window, which is a largely open problem for single-shot techniques. To solve this problem, we present a new conceptual approach for the so-called spectral decoding technique, where a chirped laser pulse interacts with a THz signal in a Pockels crystal, and is analyzed using a grating optical spectrum analyzer. By borrowing mathematical concepts from photonic time stretch theory and radio-frequency communication, we deduce a novel dual-output electro-optic sampling system, for which the input THz signal can be numerically retrieved—with unprecedented resolution—using the so-called phase diversity technique. We show numerically and experimentally that this approach enables the recording of THz waveforms in single-shot over much longer durations and/or higher bandwidth than previous spectral decoding techniques. We present and test the proposed DEOS (Diversity Electro-Optic Sampling) design for recording 1.5 THz bandwidth THz pulses, over 20 ps duration, in single-shot. Then we demonstrate the potential of DEOS in accelerator physics by recording, in two successive shots, the shape of 200 fs RMS relativistic electron bunches at European X-FEL, over 10 ps recording windows. The designs presented here can be used directly for accelerator diagnostics, characterization of THz sources, and single-shot Time-Domain Spectroscopy.

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Electro-optic sampling of optical pulses and electron bunches for a compact THz-FEL source

Cited by 11 publications

References 28 publications

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

State-of-the-art in terahertz sensing for food and water security – A comprehensive review

Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses for high repetition rate, low pulse energy lasers

Phase Diversity Electro-optic Sampling: A new approach to single-shot terahertz waveform recording

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