Optical Fibers in Terahertz Domain

Humbert, Georges

doi:10.1007/978-981-10-1477-2_33-1

Cited by 2 publications

(2 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the aim is to provide strong guidance of the terahertz waves and at the same time keep radiative losses at an acceptable level. Various approaches exist [13][14][15], where the specific implementation of dielectric waveguides may, for example, be realized in the sense of hollow-core and porous-core fibers [16,17] or as solid dielectric materials, sometimes referred to as ribbons or dielectric rod waveguides or microwires [17][18][19][20][21][22][23][24] exploiting total internal reflection. Even the combination of dielectric rods with embedded substrate lenses has recently been investigated for integration with antenna emitters [25].…”

Section: Technological Approachmentioning

confidence: 99%

Terahertz non-destructive testing of power generator bars with a dielectric waveguide antenna

Bauer

Hussung

Matheis

et al. 2022

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

Terahertz technologies for non-destructive testing (NDT) are continuing to find their way into the industrial sector in the context of very specific inspection tasks. Part of this development is the capability to adapt terahertz systems in such a way that they can meet the sometimes harsh challenges and requirements of real-world industrial scenarios. One such scenario is the inspection of components with limited available measurement space. In particular, we show here the terahertz NDT inspection of the mica insulation of generator bars of turbogenerators at power plants, where an early on-site detection of defects and cracks in the insulation can be crucial, but where only few centimeters of space between adjacent bars are available. To address this problem, we have developed a measurement system combining a 100 GHz all-electronic terahertz transceiver with a low-loss dielectric waveguide antenna with 90 degree tip. We achieve sub-wavelength image resolution by scanning the waveguide antenna's tip over the surface of the generator bars in a near-field measurement setup. Employing a frequency-modulated continuous wave technique, we obtain depth-resolved, volumetric terahertz images of the objects under test. We discuss here the implementation and performance of the implemented measurement system for terahertz NDT inspection. keywords: terahertz, non-destructive testing, dielectric waveguides, frequency-modulated continuous wave, millimeter waves, power generators

show abstract

Section: Technological Approachmentioning

confidence: 99%

Terahertz non-destructive testing of power generator bars with a dielectric waveguide antenna

Bauer

Hussung

Matheis

et al. 2022

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

show abstract

“…An alternative solution would be low loss fiber-like waveguides for 500 to 2700 GHz, with a loss of <2 dB per m. Currently, these fibers do not exist yet; for an overview see, e.g., Humbert. 26…”

Section: Challengesmentioning

confidence: 99%

Heterodyne Receiver for Origins

Wiedner¹,

Aalto²,

Amatucci³

et al. 2021

J. Astron. Telesc. Instrum. Syst.

View full text Add to dashboard Cite

The Heterodyne Receiver for Origins (HERO) is the first detailed study of a heterodyne focal plane array receiver for space applications. HERO gives the Origins Space Telescope the capability to observe at very high spectral resolution (R ¼ 10 7 ) over an unprecedentedly large far-infrared (FIR) wavelengths range (111 to 617 μm) with high sensitivity, with simultaneous dual polarization and dual-frequency band operation. The design is based on prior successful heterodyne receivers, such as Heterodyne Instrument for the Far-Infrared /Herschel, but surpasses it by one to two orders of magnitude by exploiting the latest technological developments. Innovative components are used to keep the required satellite resources low and thus allowing for the first time a convincing design of a large format heterodyne array receiver for space. HERO on Origins is a unique tool to explore the FIR universe and extends the enormous potential of submillimeter astronomical spectroscopy into new areas of astronomical research. © The Authors.Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

Optical Fibers in Terahertz Domain

Cited by 2 publications

References 82 publications

Terahertz non-destructive testing of power generator bars with a dielectric waveguide antenna

Terahertz non-destructive testing of power generator bars with a dielectric waveguide antenna

Heterodyne Receiver for Origins

Contact Info

Product

Resources

About