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Optica Applicata
2006 Vol. 36, nr 4 s. 469--473
EN Excitation spectra of sodium dimer were analysed within the range 34200–36400 cm–1. The experiment was done using polarisation labelling spectroscopy technique. In the spectral region under investigation we found several vibrational progressions belonging to a single band system having the ground st[...]
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Optica Applicata
2006 Vol. 36, nr 4 s. 499--504
EN We report on our investigation of the excitation spectra of the NaLi molecule in the energy range 31000–33900 cm–1. A polarisation labelling technique is used to ensure rotational resolution of the spectra and to enable unambiguous assignment of the NaLi transitions. A hitherto unknown electronic st[...]
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Archives of Metallurgy and Materials
PL Celem pracy są badania nad fotoakustyczną transformacją w materiałach piezoceramicznych oraz piezokryształach o różnych klasach symetrii. W pracy rozpatrywano termiczny mechanizm wzbudzania termosprężystych fal przez różne mody polaryzacyjne wiązek Bessela. W zakresie częstotliwości modulacji 100kHz[...]
EN The aim of the work is the investigation of photoacoustic transformation in piezoceramic materials and piezocrystals of various classes of symmetry. It is considered the case thermal mechanism of excitation of thermoelastic waves by various Bessel light beams polarization modes. Within the range of [...]
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Bulletin of the Polish Academy of Sciences. Chemistry
EN An experiment is described to study temporal variations of the hydrogen bond length in liquid water. The principles of this laser spectroscopic experiment are explained first. The construction of a laser source generating 150 fs pulses in the 2.5-4.4 um spectral region is detailed next. The theoreti[...]
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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN This report concerns the experiment of precision spectroscopy of cold strontium atoms in the Polish National Laboratory of Atomic, Molecular and Optical Physics in Toruń. The system is composed of a Zeeman slower and magneto-optical traps (at 461 nm and 689 nm), a frequency comb, and a narrow-band l[...]
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Optica Applicata
2016 Vol. 46, nr 4 607--618
EN A prototype optoelectronic hygrometer, based on absorption of laser light tuned to a specific rovibronic absorption line of H2O at 1364.68961 nm is described. Target application is meteorology, in particular precise and fast measurements of small-scale humidity fluctuations in turbulent atmospheric [...]
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Opto - Electronics Review
EN We describe several applications of cavity ring-down spectroscopy (CRDS) for trace matter detection. NO₂ sensor was constructed in our team using this technique and blue-violet lasers (395–440 nm). Its sensitivity is better than single ppb. CRDS at 627 nm was used for detection of NO₃. Successful m[...]
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Opto - Electronics Review
EN Detection of explosives is an important challenge for contemporary science and technology of security systems. We present an application of NOx sensors equipped with concentrator in searching of explosives. The sensors using CRDS with blue - violet diode lasers (410 nm) as well as with QCL lasers (5[...]
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Opto - Electronics Review
EN The kinetics of the diffusion-controlled triplet-triplet annihilation of anthracene was investigated with the time-resolved laser spectroscopy. The analysis of the decays of delayed fluorescence with the standard Smoluchowski model leads to an artificial dependence of the annihilation radius from th[...]
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Opto - Electronics Review
2018 Vol. 26, No. 2 103--107
EN A method for frequency-multiplexed multi-sample gas sensing is presented. It enables measuring multiple samples placed simultaneously in the setup, without any optical or mechanical switching. Samples are measured using heterodyne detection and signal from each sensing path is encoded at different c[...]
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Opto - Electronics Review
2017 Vol. 25, No. 4 269--274
EN Widely-tunable, fully-monolithic, mid-infrared (mid-IR) deference frequency generation source (DFG) is presented. By using a custom designed fiber-pigtailed periodically poled lithium niobate (PPLN) crystal module the idler beam was generated with an efficiency of 21%/W, yielding 2.6 mW of optical o[...]
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Opto - Electronics Review
EN Number of trace compounds (called biomarkers), which occur in human breath, provide an information about individual feature of the body, as well as on the state of its health. In this paper we present the results of experiments about detection of certain biomarkers using laser absorption spectroscop[...]
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Bulletin of the Polish Academy of Sciences. Chemistry
EN Design and construction of a new spectrometer for picosecond fluorescence decay measurements by time-correlated single-photon counting is described. The use of pico/femtosecond excitation pulses from a tunable Ti: Sapphire laser in combination with a fast microchannel plate photodetector and ultrafa[...]
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Przegląd Elektrotechniczny
PL W pracy przedstawiono układy sterowania laserami kaskadowymi (quantum cascade lasers – QCL) pod kątem ich zastosowania w dwóch technikach; spektroskopii strat we wnęce optycznej oraz spektroskopii wieloprzejściowej. W trakcie projektowania tych sterowników, szczególną uwagę zwrócono zarówno na param[...]
EN Quantum cascade laser drivers for absorption spectroscopy - the paper presents the fundamental aspects of optical spectroscopy using quantum cascade lasers. Two driving systems were described in terms of both QCL research and QCL applications in cavity ring down and multipass techniques. During driv[...]
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Elektronika : konstrukcje, technologie, zastosowania
PL W artykule przedstawiono uniwersalny komputerowy system pomiarowy przeznaczony do spektroskopowych badań właściwości materii. Zastosowane w nim procedury pomiarowe i algorytmy mogą służyć do konstrukcji sensorów pomiarowych wykorzystujących fizyczne efekty kwantowe.
EN We present an universal measurement system for spectroscopic investigations. Procedures and algorithms included may serve in the construction of sensors based on quantum effects.
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Bulletin of the Polish Academy of Sciences. Chemistry
EN Transient pump-probe spectroscopy of equilibrated solvated electrons is car-ried out in neat water and in an aqueolls NaCl solution (5.9 M) in the visible and near infrared using pulses of 100-170 fs duration and polarization resolution. Excitation is per-formed by a pump pulse at 620 nm in the blue[...]
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Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
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Wiadomości Konserwatorskie
2012 Nr 32 109-114
PL Ocena i analiza uszkodzeń (stanu aktualnego) oraz obiektu poddanego konserwacji (np. w procesie czyszczenia) i zabezpieczenie obiektu przed dalszą degradacją stanowią główne zadania konserwatora. Jedną z metod fizycznych, którą staje się coraz powszechniej w usuwaniu niepożądanych nawarstwień, jest [...]
EN The estimation and analysis of damages (present condition), object conservation (cleaning process), and the protection of an object against further degradation are the main tasks of conservator. One of the physical methods that is becoming more and more popular for unwanted deposit removal is the la[...]
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Elektronika : konstrukcje, technologie, zastosowania
PL W pracy przedstawiono istotne zagadnienia związane z praktycznym zastosowaniem laserów kaskadowych w układach spektroskopii absorpcyjnej (ang. Laser Absorption Spectroscopy – LAS). Dotyczą one głównie aspektów sterowania ich parametrami w poszczególnych metodach LAS. W praktyce, każda z tych metod n[...]
EN The paper presents some issues related to application of quantum cascade laser (QCL) in laser absorption spectroscopy (LAS). The main aspects of QCL control parameters in different LAS methods are disscussed. In practice, these methods influence on desired operating mode of the laser. The requiremen[...]
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Przegląd Elektrotechniczny
PL W artykule przedstawiono projekt i badania eksperymentalne bramki bezpieczeństwa umożliwiającej wykrywanie par wybranych materiałów wybuchowych. W tym celu opracowano optoelektroniczny sensor ditlenku azotu, w którym zastosowano metodę spektroskopii strat we wnęce optycznej, zaliczanej do metod o na[...]
EN The paper presents a project and investigations of a security portal with explosives sensor . In the portal, an optoelectronic NO2 sensor operating on basis of Cavity Enhanced Absorption Spectroscopy (CEAS) is applied. CEAS technique is one of the most sensitive detection methods. The presented port[...]
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