Polymer passive laser switches for stimulated emission in the region of 1.3 μm

Безродный, В. И.; Derevyanko, N. A.; Ishchenko, A. A.; Slominskii, Yu. L.

doi:10.1070/qe1995v025n08abeh000478

Cited by 5 publications

(8 citation statements)

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“…An important step in the development of dyed functional materials is the creation of the first polymer Q-switches based on polymethine dyes for lasers emitting in the region of 1300 nm [18] and 1540 nm [19]. Emission in these regions is of interest for location, light guide communication, and medicine.…”

Section: Resultsmentioning

confidence: 99%

“…Emission in these regions is of interest for location, light guide communication, and medicine. This is due to the fact that it falls into the transparency window of the atmosphere and optical fibers [18]. Radiation with = 1300 and 1540 nm is less hazardous than visible light for the human eye on account of the increase of the absorption coefficient of biological tissues on moving into the IR region [18].…”

Section: Resultsmentioning

confidence: 99%

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Molecular engineering of dye‐doped polymers for optoelectronics

Ishchenko

2002

Polymers for Advanced Techs

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The main approaches to molecular engineering of prospective dye‐doped polymer matrices for optoelectronics have been considered. The advantages of such matrices over polymers and dyes separately were analyzed. It was shown that these advantages can be realized in the case where a doping of polymers by low‐molecular‐weight dyed impurities does not essentially distort spectral, luminescent and nonlinear optical properties of the individual components of polymer composition. The influence of polymer nature and chemical constitution of organic dyes on photophysical and photochemical properties of these matrices was analyzed. Processes of dye aggregation in polymers were characterized. Their influence on photophysical properties and the photochemical stability of dye‐doped materials was discussed. The different approaches for struggle with it is offered. The influence of the method of introduction of a dye into a polymer on the output parameters of dyed materials was considered. The main paths of energy degradation of electronic excitation in such materials – internal conversion, electron transfer and photoisomerization – were analyzed. The role of dyes in the process of generation, in recombination and in the carriage of charges in photoconductive polymers was discussed. The prospects for the application of dye‐doped polymer materials as passive Q‐switches of solid‐state lasers, as active laser media with large Stokes shift, as luminescent solar converters and as electroluminescent emitters were demonstrated. Copyright © 2003 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Molecular engineering of dye‐doped polymers for optoelectronics

Ishchenko

2002

Polymers for Advanced Techs

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“…By using such a wide assortment of possibilities from polyurethanes, high-performance active laser media [166] and passive laser shutters for neodymium [161][162][163] and ruby [164] lasers have been developed on the basis of polyurethane and dyes. Among them the first in the world was a polymeric dyed modulator at a wavelength of 1300 nm [163], which has been widely used in fiber optics and ophthalmology [4].…”

Section: Methods Of Introduction Of Dyes Into the Polymer And Their Cmentioning

confidence: 99%

“…Practically all types of organic dyes can therefore be introduced into them without decomposition. In [161][162][163][164][165][166][167] this was done for metal complexes with organic chromophores and polymethine, xanthene, and pyrromethene dyes. The increased interest in dyed PU is also due to a series of additional advantages of the urethane matrix.…”

Section: Methods Of Introduction Of Dyes Into the Polymer And Their Cmentioning

confidence: 99%

“…Among them the first in the world was a polymeric dyed modulator at a wavelength of 1300 nm [163], which has been widely used in fiber optics and ophthalmology [4]. Protective light filters against laser radiation in the region of 1060 nm, which reduce it by more than six orders of magnitude with visual transmission greater than 80%, have also been developed [167].…”

Section: Methods Of Introduction Of Dyes Into the Polymer And Their Cmentioning

confidence: 99%

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Physical and chemical problems of the creation of photostable converters of light energy on the basis of dyed polymers

Ishchenko

Grabchuk

2009

Theor Exp Chem

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The main factors affecting the degradation of dyed polymeric matrices by the action of light (conversion of light energy into thermal energy, electron phototransfer, population of triplets, aggregation of dyes, oxidation-reduction processes, interaction with oxygen, including singlet) are analyzed and classified. Their dependence on the structure of the dyes, the nature of the polymer, and the method of dyeing of the latter is examined. Criteria for the creation of lightfast dyed matrices are formulated. Special attention is directed to contemporary light-sensitive materials in which the dye is covalently bonded to the polymer and to organic-inorganic compositions based on them.Dyed polymers are widely used in laser technology [1][2][3][4][5], media for writing and recording data [6-8], solar power [9][10][11][12], and optoelectronics [12][13][14][15]. Such polymeric materials have a series of operational advantages over dyed liquid materials on account of their more simple and more convenient construction, non-toxicity, and the possibility of working over a wide temperature range (from minus to plus temperatures) and under conditions of weightlessness. However, these advantages can only be realized to the full extent in the solution of various applied problems if dyed matrices with sufficient stability to the action of light are created. The aim of the present review was therefore to analyze, classify, and generalize methods of creating such matrices. FACTORS GIVING RISE TO THE DEGRADATION OF DYED POLYMERS DURING THE ACTION OF LIGHTThe presence of absorbing microimpurities that are heated by radiation are responsible for the radiation damage of optically transparent polymers. Purification from such inclusions at the monomer stage leads to a substantial increase in the threshold of radiation damage in the obtained polymer. For instance, the purification of methylmethacrylate (MMA) by repeated slow distillation raises this threshold of polymethylmethacrylate (PMMA) from several times [16] to two orders of magnitude [17]. 0040-5760/09/4503-0143

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