Temat: lasers - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Construction and performance of an optical phase and frequency lock of diode lasers
Autorzy:: Kawalec, Tomasz
Bartoszek-Bober, Dobrosława
Opis:: The relative phase and frequency stabilization setups for diode lasers are discussed. The construction and performance of an optical phase lock loop based on integrated phase-locked loop chips are shown along with practical tips facilitating its preparation. The interference pattern between two electronically locked lasers is shown as a proof of the system stability. The fringes contrast is a quantitative indicator of the mean-square phase error. Finally, an example of a very simple frequency offset lock realized with an all-in-one radio chip is also provided.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 2.

Tytuł:: Laser technology and applications 2012
Autorzy:: Romaniuk, Ryszard S.
Gajda, Jerzy
Wydawca:: Polish Academy of Sciences
Cytata wydawnicza:: R.S.Romaniuk, J.Gajda, Laser technology and applications 2013, International Journal of Electronics and Telecommunications, 2013, vol.59, no.2, pp.195-202
Opis:: Warsaw University of Technology
The research and technical achievements in the area of lasers are summarized every three years by the National Symposium on Laser Technology held in the Baltic See Resort ´S winouj´scie near Szczecin, Poland. The paper presents a review of the main symposium subjects tracks debated during this key national laser event in September 2012. There are shown development tendencies of laser materials and technologies and laser associated branches of optoelectronics in this country, including the efforts of academia, governmental institutes, research businesses and industry. The symposium work are divided to two branches: development of lasers and laser applications, where the laser systems operators and laser users present their achievements. Topical tracks of the meeting are presented, as well as the keynote and invited subjects delivered by key representatives of the laser industry. The STL 2012 was a jubilee meeting held for the Xth time.
Ryszard Romaniuk
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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Skocz do pozycji: 3.

Tytuł:: Pomiar odkształceń kół zębatych przy zastosowaniu interferometrii holograficznej
Measurement of gear wheel displacements with use of holographic interferometry
Autorzy:: Morzuch, W.
Tematy:: holografia
lasery
holography
lasers; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/158587.pdf Link otwiera się w nowym oknie
Opis:: Przedstawiono pomiar przemieszczeń i naprężeń kół zębatych metodą interferometrii holograficznej. Przedmiotem badań było koło zębate. W pomiarach zastosowano jedną z metod holografii optycznej zwanej metodą podwójnej ekspozycji. W wyniku interferencji fali przedmiotowej i fali odniesienia na materiale światłoczułym otrzymano obraz prążków interferencyjnych na podstawie których wyznaczono przemieszczenia i naprężenia.
The estimation of displacements and stresses of gear wheels with use of holographic interferometry is presented . A gear wheel was an object of investigations. The double exposure method of optic holography was used for measurements. As a result of the interference of the reference and main wave on a light sensitive material, an image of interferential striae was obtained. On the basis of this image, displacements and stresses of the studied object could be determined. The gear wheel tested is shown in Fig. 1, whereas the scheme of the test stand is presented in Fig. 2. Fig. 3 shows the load of the gear wheel. The standard beam is depicted in Fig. 4. Based on the interferometry striae shown in Fig.5, the displacements and stresses were determined. The loads at the stop of the tooth and at the pitch diameter are given in Tabs. 1 and 2. The stresses with the load at the stop are shown in Fig. 6. The stresses with the load on the pitch diameter are shown in Fig. 7. Based on the results given in Tabs.1 and 2, the displacements and stresses of the studied object were determined. In this work the holographic method and the method of finite elements were used.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: New pico- and femtosecond laser based sources: from the Infra-Red to the XUV
Autorzy:: Petite, G.
Tematy:: lasers
short pulses
ultrafast phenomena; Pokaż więcej
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Powiązania:: https://bibliotekanauki.pl/articles/308713.pdf Link otwiera się w nowym oknie
Opis:: In this paper, we review a number of recent developments concerning laser or laser-based sources generating pico- or subpicosecond pulses of light at wavelengths now ranging from the mid Infra-Red (50 ľm) to the XUV (11,9 nm). Those include the new generation of 'Chirp Pulse Amplification' laser systems, Free Electron Lasers operating in the IR or visible range, and a number of laser driven sources covering the XUV range, and a number of laser driven sources covering the XUV range, generally based on the high intensity irradiation of solid or gaseous targets. The main perspectives, applications and essential issues concerning such sources are discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Laser Technology and Applications 2012
Autorzy:: Romaniuk, R. S.
Gajda, J.
Tematy:: lasers
laser technology
lasing materials
optoelectronics
laser theory
laser design
laser components
kinds of lasers
semiconductor laser
VCSEL
laser applications
photonics
nonlinear photonics
active optical fibers
optical fiber lasers
high power lasers
high intensity lasers
laser atomic clocks; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/226404.pdf Link otwiera się w nowym oknie
Opis:: The research and technical achievements in the area of lasers are summarized every three years by the National Symposium on Laser Technology held in the Baltic See Resort Świnoujście near Szczecin, Poland. The paper presents a review of the main symposium subjects tracks debated during this key national lase event in September 2012. There are shown developement tendencies of laser materials and technologies and laser asociated branches of optoelectronics in this country, including the efforts of academia, governmental institutes, research businesses and industry. The symposium work are divided to two branches: development of lasers and laser applications, where the laser systems operators and laser users present their achievements. Topical tracks of the meeting are presented, as well as the keynote and invited subjects delivered by key representatives of the laser industry. The STL 2012 was a jubilee meeting held for the X^th time.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Fiber-based laser frequency combs
Autorzy:: Soboń, G.
Abramski, K.
Tematy:: laser physics
fiber-based optical frequency combs
fiber lasers
mode-locked fiber lasers; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/201651.pdf Link otwiera się w nowym oknie
Opis:: For the last decade a very attractive field of laser physics, namely the optical frequency comb technique, has been intensively developed. Fiber lasers play particular role in that area. The motivation of their development is obtaining broadband comb systems with well-defined and stable mods (comb teeth). This paper presents a basic overview devoted to the fiber-based optical frequency combs.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 7.

Tytuł:: Picosecond mode-locked tm-doped fibre laser and amplifier system providing over 20 W of average output power at 1994 nm
Autorzy:: Grześ, P.
Michalska, M.
Świderski, J.
Tematy:: pulsed fibre lasers and amplifiers
mid-infrared
mode-locked lasers
thulium-doped fibres; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/220559.pdf Link otwiera się w nowym oknie
Opis:: A mode-locked Tm³⁺-doped fibre laser and amplifier operating at a central wavelength of 1994.3 nm is demonstrated. A thulium oscillator is passively mode-locked by a semiconductor saturable absorber mirror to generate an average power of 17 mW at a fundamental repetition rate of 81 MHz in a short linear cavity. This 2-μm laser train is amplified to an average power to 20.26 W by two double-clad thulium-doped all-fibre amplifiers. The pulse energy, duration and peak power is 250 nJ, 23 ps and 9.57 kW, respectively. This represents one of the highest values of average power at ~2-μm-wavelength for picosecond thulium-doped fibre lasers and amplifiers. The performance of the laser system is described in details.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Development of Free Electron Lasers in Europe Local and Global Implications : 2016
Autorzy:: Romaniuk, R. S.
Tematy:: laser technology
laser development
lasers
free electron lasers
photonics
EUV radiation
RTG radiation
research infrastructures; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/227040.pdf Link otwiera się w nowym oknie
Opis:: Free electron laser FELs are built in Europe mainly as nondependent infrastructures, or as a development of synchrotron ones. They are constructed mainly in centres which have considerable experience with synchrotron light sources of the third generation like DESY, Trieste, INFN, etc. Advances in very energetically efficient superconducting linear accelerators for electron beams, like TESLA type, caused an abrupt development of FEL machines all over Europe. New generation of FELs emits light beam of extreme intensity, good parameters, in IR, VIS, UV, EUV and X-ray spectral regions. The machine construction teams comprise also of young active researchers from Poland. In particular, these is a considerable participation of M.Sc. and Ph.D. students from Warsaw University of Technology at building of FLASH I, FLASH II, and EXFEL machines. Unique experiences gathered at work with these large experiments result in development of these young teams, and their further engagement in new initiatives: laser, laser - accelerator, inertial, plasma, plasma - energy, etc. This is what we observe with satisfaction. However, due to the lack of large research infrastructures in Poland, we are not members of the infrastructure owner clubs. Our young researchers may take part in the initiatives only indirectly as members of cooperative teams from the leading countries. As a further consequence, there is also a confined access of Polish laser and accelerator researchers to some kinds of European infrastructure development projects now under realization within the H2020.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 9.

Tytuł:: GaAs/AlGaAs (~9.4 žm) quantum cascade lasers operating at 260 K
Autorzy:: Bugajski, M.
Kosiel, K.
Szerling, A.
Kubacka-Traczyk, J.
Sankowska, I.
Karbownik, P.
Trajnerowicz, A.
Pruszy, E.
Pierciński, K.
Pierścińska, D.
Tematy:: quantum cascade lasers
pulsed mode; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/200656.pdf Link otwiera się w nowym oknie
Opis:: The fabrication of Quantum Cascade Lasers (QCLs) emitting at 9.4 um is reported. The devices operated in pulsed mode at up to 260 K. The peak powers recorded in 77 K were over 1 W, and the slope efficiency 0.5–0.6 W/A per uncoated facet. This has been achieved by the use of GaAs/Al0.45Ga0.55As heterostructure, with 3QW anticrossed-diagonal design originally proposed by Page et al. [1]. Double plasmon planar confinement with Al-free waveguide has been used to minimize absorption losses. The double trench lasers were fabricated using standard processing technology, i.e., wet etching and Si3N4 for electrical insulation. The QCL structures have been grown by Molecular Beam Epitaxy (MBE), with Riber Compact 21T reactor. The stringent requirements – placed particularly on the epitaxial technology – and the influence of technological conditions on the device structure properties are presented and discussed in depth.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Injection lasers in metrological applications
Lasery półprzewodnikowe w zastosowaniach metrologicznych
Autorzy:: Manak, I.
Wójcik, W.
Tematy:: injection lasers
metrology
lasery półprzewodnikowe
metrologia; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/152354.pdf Link otwiera się w nowym oknie
Opis:: Opportunities of realization labor and exemplary measuring instrument, based on injection lasers with energy and time parameters, spectrum radiations line width in oscillating mode, power density distribution in beams cross-section of sources with astigmatism regulation are considered.
W pracy omówiono możliwość realizacji laboratoryjnego instrumentu pomiarowego wykorzystującego lasery półprzewodnikowe. Analizowane są przy tym jego parametry energetyczne i czasowe, szerokość linii widmowej, rozkład gęstości mocy dla źródeł z korekcją astygmatyzmu.
Dostawca treści:: Biblioteka Nauki

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