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PL
W artykule przedstawiono numeryczny model wzmacniacza włóknowego pracującego w reżimie wzmacniania impulsów promieniowania o nanosekundowych czasach trwania. W oparciu o zaprezentowany opis matematyczny wzmacniacza opracowany został program komputerowy pozwalający na symulację pracy układu. W celu sprawdzenia poprawności działania opracowanego programu komputerowego dokonano praktycznej realizacji impulsowego wzmacniacza włóknowego, zbudowanego w oparciu o dwupłaszczowe włókno typu Large Mode Area (LMA) domieszkowane iterbem. Na wyjściu układu uzyskano impulsy nanosekundowe o mocy szczytowej 11 kW. Układ pracował ze sprawnością 30% przy częstotliwości w zakresie od 10 kHz do 40 kHz.
EN
The paper presents the numerical model of a pulsed fiber amplifier working in nanosecond range. Based on the mathematical description of the fiber amplifier, the computer program allowing us to simulate the system operation was developed. In order to verify the correctness of the computer program worked out, the pulsed fiber amplifier system based on ytterbium-doped double-clad Large Mode Area optical fiber was elaborated. Nanosecond pulses characterized by 11-kW peak power were achieved. The system worked at the efficiency of 30% and generated pulses of radiation at the repetition rate from 10 kHz to 40 kHz.
2
Content available remote Rare-earth-doped high-power fiber lasers generating in near infrared range
EN
n this paper, high power double-clad fibre lasers are presented. We have built twoexperimental laser set-ups based on neodymium- and ytterbium-doped active media. A Yb³⁺-silica fiber laser has been cladding pumped at 937 nm by a InGaAs semiconductor laser diode and generated 4 W cw output power with slope efficiency of 73 ± 3%. However, Nd³⁺-doped fiber laser generated over 10 W cw output power with a slope efficiency of 63%. As a result of the experiment, we have elaborated very efficient coherent sources of laser radiation that can be used in many industrial applications.
3
Content available remote Lasery włóknowe : wysokoenergetyczne źródła promieniowania koherentnego
PL
Artykuł prezentuje wybrane zgadnienia konstrukcji laserów włóknowych dużej mocy. Tematyka ta jest niezwykle ciekawa, a przede wszystkim aktualna. Lasery włóknowe w literaturze często nazywane są laserami XXI wieku, a parametry promieniowania przez nie generowanego predysponują te urządzenia do wielu aplikacji przemysłowych. Artykuł koncentruje się na specyficznych konstrukcjach włókien aktywnych, stosowanych w układach laserów wysokiej mocy. Prezentują również rekordowe osiągnięcia układów pracy ciągłej i impulsowej.
EN
The paper presents a high power fiber laser issue. This issue is not only very interesting but also up-to-date. In the literature fiber lasers are called the lasers of the 21st century. Parameters of radiation generated by these generators enable these devices to be used in many industrial applications. This article focuses on specific active optical fiber constructions used in high power laser systems, as well as presents record achievements of cw and pulse laser systems.
PL
W pracy przedstawiono genezę, założenia, cele do osiągnięcia oraz tematykę zgłoszonego przez KEiT PAN do ustanowienia przez KBN Projektu Badawczego Zamawianego
EN
In this article selected topics of the Commanded R/D Project aiming the development of basie components for the industry of optoelectronic Instruments designed for medical, industrial, environmental and military applications. The areas of development of optoelectronics in Poland were selected on the basis of market considerations, existing R/D results in polish laboratories and the possibilities of their utilization by the industry, in particular by smali and medium enterprises.
PL
Rola optoelektroniki we współczesnych systemach komunikacyjnych, a także w zastosowaniach medycznych, wojskowych i w ochronie środowiska stale się zwiększa. Obrazuje to gwałtowny wzrost rynku laserów na świecie, a także opanowanie nowego zakresu długości fal niebieskich i UV. W artykule omówiono te trendy, a także podstawowe kierunki optoelektroniki, które ze względu na ich dużą dynamikę rozwojową oraz aktualny stan badań i prac rozwojowych w kraju mogłyby stać się polską specjalnością na rynkach międzynarodowych. Kierunki te to: technologie laserowe, optoelektroniczne urządzenia i systemy pomiarowe, systemy detekcji zobrazowania oraz niebieska optoelektronika.
EN
The role of optoelectronics in modern communication systems and also in medical, military and environmental protection applications is rapidly increasing. This is illustrated by a very dynamic increase of the world laser market and especially by a very fast development of "blue electronics". In this paper basic directions of optoelectronic development, which because of their large research and market interest and the actual state of research and development in Poland, could be the Polish specialisation in the world research and industrial area, are described. These directions include laser technologies, optoelectronic sensor, detection and imaging systems, optoelectronic equipment and measuring systems "blue optoelektronics".
6
Content available remote Diode-pumped solid-state lasers
EN
Progress in technology and construction of diode-pumped laser made in the 80's caused renewed intereset in diode pumping of active media of solid-state lasers (DPSSL -Diode Pumped Solid State Laser) and next their rapid development. At present, DPSSL are commonly applied in medicine and industry.The paper presents advantages of such excitation and significant improvement in generation efficiency, longer service life of devices, smaller dimensions of quantum generators and theirs power suppliers. Special attention is paid to the possibility of application of new active media (new neodymium doped hosts), including ytterbium (Yb) doped media, that have perfect functional parameters with diode pumping. Fundamental configurations of active media and their excitation methods are described. A "slab" type geometry used for high-power lasers is distinguished. It is shown that construction of, so-called, microlasers is possible when diodes are used as pumps of solid state lasers. Microlasers can generate strictly monochromatic radiation (i.e.,generate only one longitudinal mode). These lasers can be used for rangefinder transmitters and radars with heterodyne detection - new type devices applicability range of which is difficult to predict. Microlasers can be also used as frequency and length standards. A group of fibre lasers is considered and their unusual possibilities are described, among others generation of beams of high quality (M² ~1) and high-power (1 kW). The examples of construction of high-power DPSSL (3,5 kW) are presented.
7
Content available remote Coherent light sources of the eye-safe spectral range
EN
A review of the papers devoted to the coherent light sources of the eye-safe spectral range is presented. An analysis of Er3+ spectroscopic parameters has been done. Such laser types as bulk glass:Er lasers, crystal:Er lasers, and fiber Er:lasers have been over viewed. Various methods of 1.5-um emission achievement, such as frequencies mixing, Raman scattering, and active wave guiding have been discussed.
EN
The system of single -frequency He-Ne laser, with a thin-film selector, working with stabilization of frequency of output beam power is presented. The stabilization loop includes the Amstrad 6128 computer connected with digital system for piezoceramic control that has been designed for this purpose. Construction of shifters ensuring transverse and longitudinal effects are shown and results of their examinations are discussed. The ranges of selection of a single longitudinal mode and measurement results of the output power stabilty are also given.
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