THz reflection spectra of different materials, including explosives, measured at a distance up to 5 m
PBN-AR
Instytucja
Wydział Fizyki (Politechnika Warszawska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
ACTA PHYSICA POLONICA A
ISSN
0587-4246
EISSN
1898-794X
Wydawca
Institute of Physics Polish Academy of Sciences
DOI
Rok publikacji
2015
Numer zeszytu
3
Strony od-do
689-692
Numer tomu
127
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Bolometers
Explosives
Infrared detectors
Optical parametric oscillators
Parametric oscillators
Terahertz waves
Hot electron bolometer
Laser wavelength
Nanosecond pulse
Narrow bands
Reflection spectra
Reflection spectroscopy
Terahertz systems
Time domain spectroscopy
Terahertz spectroscopy
Streszczenia
Język
en
Treść
This work presents a terahertz system designed for the reflection spectroscopy of different materials located at a distance up to 5 m. The source of the radiation is a tunable solid-state optical parametric oscillator, which generates a narrow-band nanosecond pulses in the range of 0.7-2.5 THz. The signal is detected with relatively fast and having big sensitivity hot electron bolometer. The detailed description of each device and the functioning of the experimental setup are provided as well as the methodology of the measurement is explained. Investigations were performed in the 0.7-2.2 THz range in free space with relative humidity of about 40%. The experiment was divided into three series, each of which was carried out with different distance between the examined sample and the system - 1 m, 3 m, and 5 m. Obtained spectra of selected materials, including explosives, are similar to the results received from a purged time domain spectroscopy system. The observed small deviations are connected with fluctuations of the laser wavelength and the instability of the bolometer. © 2015, Polish Academy of Sciences. All rights reserved.
Cechy publikacji
Fizyka
Physics
discipline:Elektronika
discipline:Electronics
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:588310
CrossrefMetadata from Crossref logo
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