An Open-Source 3D-Printed Terahertz Pulse Time-Domain Holographic Detection Module for Broadband Beam Inspection

Grachev, Yaroslav V.; Kokliushkin, Vladimir A.; Petrov, Nikolay V.

doi:10.1109/irmmw-thz46771.2020.9370701

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…Thus, the possibility of detecting space-integrated radiation allows to use of single-pixel detectors, which are preferable in the measurement of broadband THz radiation, due to the availability of sensitive methods, like electro-optical sampling used in time-domain spectroscopy (TDS), and detectors like bolometers. In turn, wideaperture measurement devices, such as detection module for THz pulse time-domain holography (PTDH) 40,41 and matrices 42 exist, they have a limit in sensitivity per intensity. Due to the advantages of GI in the THz frequency range have already been presented methods in which there is a modulation of pump radiation, during the generation of THz radiation in crystals, which forms a spatial distribution already in the THz beam, 44,45 there are also presented implementations with modulation of the probe beam.…”

Section: Spectral Multiplexing In the Thz Frequency Rangementioning

confidence: 99%

Ghost imaging with auxiliary multiplex channels: a review of the latest results

Petrov,

Ismagilov,

Oparin

et al. 2024

Speckle 2023: VIII International Conference on Speckle Metrology

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In this paper, we present a review of the latest results obtained in the scope of ghost imaging using auxiliary multiplex channels. The proposed methods make it possible to increase the speed of image acquisition, as well as eliminate distortions in the signal of a bucket detector. One of the most serious limitations of ghost imaging is the large number of measurements required. During the data acquisition, the optical environment where the observation object is located may change its parameters, which will negatively affect the quality of the reconstructed image. To solve these problems, it is possible to use fast spatial light modulators to set structured patterns and fast detectors. However, such equipment is not available in some spectral ranges and is not able to suppress distortions in the detected signal. In this regard, our team has proposed a number of techniques to solve the problems of a large number of measurements and non-stationarity of the optical medium in ghost imaging systems. First of all, an auxiliary polarization channel method was presented in a ghost imaging system to eliminate distortion in the signal of a bucket detector. Secondly, wavelength multiplexing methods have been proposed in the visible and terahertz wavelength ranges. These methods will make ghost imaging systems more applicable to the tasks of remote sensing and mapping of areas in various spectral ranges.

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Section: Spectral Multiplexing In the Thz Frequency Rangementioning

confidence: 99%

Ghost imaging with auxiliary multiplex channels: a review of the latest results

Petrov,

Ismagilov,

Oparin

et al. 2024

Speckle 2023: VIII International Conference on Speckle Metrology

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show abstract

“…Another particular solution for shaping the THz vortex beam with LC cells was proposed by Shen et al 160 . Digital micro-mirror device was adopted for dynamic microlithography to control the azimuthal angle inhomogeneity of LC directors to obtain the Bessel-like beam phase diagram with axial singularity.…”

Section: Liquid Crystalsmentioning

confidence: 99%

Design of broadband terahertz vector and vortex beams: I. Review of materials and components

Petrov¹,

Sokolenko²,

Kulya³

et al. 2022

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In this paper, we review the existing approaches for vortex and vector beam shaping and generation in the terahertz frequency range. The particular focus of this review is on the possibility of homogeneous topological charge formation in the ultra-wide spectral interval inherent to ultrashort terahertz pulses. We review the available materials and components, analyse proposed and potentially possible solutions for broadband terahertz vortex and vector beam shaping, compare all developed approaches, and put forward a unified concept for constructing passive shapers of such beams from the existing component base.

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“…In addition, it also can be exploited as an effective 'virtual instrument' to predict specific properties of ultra-fast pulses after their propagation through or reflectance from the specific elements/components/samples. In this paper, we will pay attention to opportunities for numerical wavefront shapers design, while the description of experimental works [24,20,23] and manufacturing of the measurement unit based on 3D-models in open-source codes [25,26], remains beyond the scope of our current consideration.…”

Section: Iixmentioning

confidence: 99%

“…These possibilities of numerical research, after the beam shaper manufacturing, can be supplemented by the potential of physical experimental research. Indeed, having an electrooptical detection module [40] available or fabricating it using additive manufacturing methods based on open source 3D models [25,26], it is possible to record the spatiotemporal dependence of the THz field strength in the diffraction zone. Then, by excluding a possible measurement system response (e.g.…”

Section: Wavefield Evolution During the Propagation Through The Modul...mentioning

confidence: 99%

Design of broadband terahertz vector and vortex beams: II. Holographic assessment

Petrov¹,

Sokolenko²,

Kulya³

et al. 2022

gxjzz

Self Cite

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In this paper, we demonstrate the capabilities of the terahertz pulse time-domain holography in visualisation, simulation, and assessment of broadband THz vortex beam formation dynamics upon its shaping by elements of beam converter, and further propagation and manipulation. By adding Jones matrix formalism to describe broadband optical elements, we highlight the differences in the spatial-spectral and spatio-temporal structure of the formed vortex and vector beams dependence on the modulator used and visualise their modal features. The influence of diffraction field structure from each element in the broadband vortex modulator is revealed in numerical simulation and the formed beams are analysed against the simplified Laguerre-Gaussian beam model.

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An Open-Source 3D-Printed Terahertz Pulse Time-Domain Holographic Detection Module for Broadband Beam Inspection

Cited by 5 publications

References 6 publications

Ghost imaging with auxiliary multiplex channels: a review of the latest results

Ghost imaging with auxiliary multiplex channels: a review of the latest results

Design of broadband terahertz vector and vortex beams: I. Review of materials and components

Design of broadband terahertz vector and vortex beams: II. Holographic assessment

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