Laser media based on coloured polyurethane

Безродный, В. И.; Ishchenko, A. A.

doi:10.1070/qe2000v030n12abeh001862

Cited by 26 publications

(9 citation statements)

References 1 publication

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“…Here a conversion efficiency of 43% was achieved, corresponding to the best media samples for the visible region [166].…”

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

confidence: 99%

“…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%

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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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“…Here a conversion efficiency of 43% was achieved, corresponding to the best media samples for the visible region [166].…”

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

confidence: 99%

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

confidence: 99%

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

confidence: 99%

See 1 more Smart Citation

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 passive mode-locking thin film represented as a polyurethane matrix (thickness 100 µm) which was activated by molecules of organic dye (No.4965) and placed in optical contact between the opaque mirror and the wedge-shaped glass ( Fig.2). High adhesion contact of used polymer film to the surface of the glass allows to limit only with optical contact [16]. Refractive indexes of polyurethane thin films and glasses were approximately equal (n=1.52) and that provided full immersion at the interfaces between the polyurethane film and the wedge-shaped glass.…”

Section: Experimental Set Upmentioning

confidence: 99%

Investigation of extended pulse trains formation in Nd:YAG laser with nonlinear optical feedback and dye-activated polyurethane thin film

Bakhramov¹,

Ischenko²,

Kokhkharov³

et al. 2007

SPIE Proceedings

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“…The improvement of the radiation resistance of widely used polymethyl methacrylate (PMMA) media is often achieved by its modifying with low molecular additives [4,5]. However such plasticization is accompanied by a deterioration of the mechanical properties and shape stability of PMMA based laser elements According to [6][7][8] Ph-510 can interact with components of the reaction mixture to form urethane groups [6]. Table 1 shows the compositions of the samples and their abbreviation.…”

Section: Introductionmentioning

confidence: 99%

The dynamic characteristics of polyurethane matrix of dye laser solid-state active elements

et al. 2016

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Investigations of polyurethane matrices for solid-state laser active elements showed that comparison of chain mobility and permeability for low molecular substances of polyurethanes based on glycol and diisocyanate components of various structures allows predict their radiation resistance and choose optimal chemical composition of polyurethane. The correlation was shown of polyurethane dynamic properties with values of their elastic modulus and laser damage threshold under pulsed laser irradiation as well as the weak influence of phenalenone dyes introduction on the above characteristics.

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Laser media based on coloured polyurethane

Cited by 26 publications

References 1 publication

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

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

Investigation of extended pulse trains formation in Nd:YAG laser with nonlinear optical feedback and dye-activated polyurethane thin film

The dynamic characteristics of polyurethane matrix of dye laser solid-state active elements

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