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Information × Registration Number 0211U006042, 0109U005585 , R & D reports Title Mini- microchip of lasers with polymeric and crystal gates: management time and spectral characteristics. popup.stage_title Head Bezrodnyi Vladimir Ivanovichsh, Registration Date 16-02-2011 Organization Institute of physics NASU popup.description2 The object of development. The foundations for the creation of polymer passive laser Q-switches based on organic dyes for the Q-switched microchip mini-lasers were established in carrying out this project. The project is based on a comprehensive research and development of stable high-efficient passive laser Q-switches, which can be used in pulsed lasers to control the duration of the radiation by Q-switching the cavity of mini- or microchip lasers. The polymer matrices, used for laser elements with organic dyes were analyzed. Particular attention is given to the polymer matrices, which under normal conditions are in a highly elastic state, resulted in a high radiation resistance. For example, polyurethane and polyurethaneacrylate matrices of a network structure, providing a specific radiation resistance were studied. The second important part of polymer passive laser Q-switchs is a phototropic substance - an organic dye, which has a resonant absorption at the operating wavelength of a mini-chip laser. Organic dyes of a polymethene class and organometallic complexes of nickel were investigated. The aim of development. The main aim of the project was to create mini- or microchip lasers with polymer passive laser Q-switches. Our project was based on a comprehensive research and development of stable and at the same time high-efficient passive laser Q-switches, which can be used in pulsed lasers to control the duration of the radiation by Q-switching the resonator of mini- or microchip lasers. The work on the project was carried out in the directions of obtaining efficient lasing at wavelengths of 1.06, about 1.3 and 1.5 microns. The first wavelength was taken as a base, and two others were got from stimulated Raman scattering. Research methods and equipments. Our project is based on a comprehensive study of the factors, affecting the efficiency of Q-switched PPLZ, as well as the development of highly stable passive Q-switches, provided long-term operation of mini-microchip lasers, which can operate safely in the visible spectral range. The scientific and technical literature on the use of polymer matrices for laser elements based on organic dyes was analyzed in detail. The general state of the organic dyes, which have phototropic properties and resonantly absorb at the fundamental operating wavelength of a neodymium laser was investigated. The optimization of a solid-state nonlinear media for efficient transformation in stimulated Raman transition was made. Spectral, temporal and energy experimental research methods were used. The following techniques were used: a spectrophotometer (VSU-2P), a device for the average power and energy measurement (IMO-2H), an oscilloscope (C1-104), a digital voltmeter (V7-16A), a laser ("LASER-KIT", ALFALAS firm). This work was aimed on the development of efficient polymer passive laser Q-switches based on organic dyes that are able of working in the cavities of mini-chip diode-pumped lasers. This, in turn, will provide a new generation of lasers for general purposes with the use of a miniature layout of all elements of a laser (diode pumping of the active element, passive laser Q-switches, nonlinear crystals for the excitation of stimulated Raman scattering) and will increase the stability and continuity of the whole product, as well as expand the fields of applications. For example, they can be used in the development of radars for road transport, in order to avoid collisions, in the creation of height precise indicators for the aircrafts. Practical results. Effective polymer passive laser Q-switches based on organic dyes were developed. For Q-switches, a polyurethane polymer composition, produced by a polycondensation reaction of diol with diisocyanate was proposed and tested. The efficient polymer passive laser Q-switches were developed by activation with organometallic complexes of nickel. These elements can be quite small, which are compatible with mini lasers. The mini-lasers with the optical cavity length of 12 mm were created and investigated. Their main energy and time parameters were studied. Compared with the known passive laser Q-switches based on Cr+4:YAG, mini-lasers using a polymer passive laser Q-switches have the following advantages: -a reduction of the lasing threshold, -a tripling the energy giant monopulse, -a decrease in almost four times of the length of the giant single pulse, -an increase of the order of peak power in a giant, -a reducing in the repetition period of the giant pulses, -improved stability of the pulse train relative to the average value. The field of use is instrumentation equipment based on laser devices. Possible applications are scientific research in physics, chemistry, biology, medicine, geodesy, ranging. Key words: laser, passive Q-switch, polyurethane, diode-pumping. Product Description popup.authors Безродний Володимир Іванович Негрійко Анатолій Михайлович Потьомкіна Жанна В'ячеславівна Удовицька Олена Григорівна popup.nrat_date 2020-04-02 Close