Polymer active and passive laser elements made of organic dyes

Безродный, В. И.; Przhonskaya, O. V.; Tikhonov, E. A.; Bondar, Mykhailo V.; Shpak, M. T.

doi:10.1070/qe1982v012n12abeh006296

Cited by 21 publications

(7 citation statements)

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“…The first method has been widely used for dyeing oligourethaneacrylate with various type of organic dyes mostly to create active and passive laser media [133][134][135] and also holographic lattices [136][137][138][139]. The main problem of this method lies in the use of UV radiation for initiation, which is a powerful factor in the photodegradation of organic dyes [37,62].…”

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

confidence: 99%

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

confidence: 99%

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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“…Such absorbers should be highly efficient and photostable, they should have short excitedstate relaxation times, large absorption cross sections a, a reasonable service life, and be easy to use [1,2]. The last requirement is fully satisfied by solid-state passive laser switches (PLSs), particularly those with polymer matrices which are coloured by organic dyes [3][4][5][6][7][8]. Replacement of liquid PLSs with solid switches increases the reproducibility of the temporal and energy parameters of the output radiation [5,7] and simplifies greatly laser design.…”

mentioning

confidence: 99%

“…Passive switches [4,5] which are free films without facilities for mechanical displacement of the working zone are unsuitable for pulse-periodic lasers and have to be handled carefully because of their low resistance to abrasion. It is much preferable to adopt a triplex block configuration [3,6,7] in which a coloured polymer film is sandwiched between optical substrates that ensure the removal of heat, prevent penetration of atmospheric oxygen, and protect the polymer film from mechanical damage.We investigated the operating characteristics of our new PLSs based on a polyurethane matrix coloured with polymethine dyes and intended for the emission range A las = 1.05 - …”

mentioning

confidence: 99%

“…The composition of the initial polymer components was selected so that there was no damage at all to the dye molecules during the hardening time. This was an important factor by which our polyurethane matrices differed from polymethyl methacrylate [9] and polyurethane acrylate [3,4] matrices, in which hardening by the radical polymerisation method resulted in considerable damage to organic dyes.…”

mentioning

confidence: 99%

“…The stability and operating characteristics of the new PLSs were compared with the corresponding characteristics of PLSs based on the recently popular PD-3274 [13] in a polyurethane acrylate matrix [3]. The photostability of both liquid and solid solutions of dyes in the presence of light covering a wide range of visible wavelengths is of practical importance.…”

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Highly stable polymethine-dye-based polymer switches for passive mode locking in neodymium lasers

Безродный

Ishchenko

Karabanova³

et al. 1995

Quantum Electron.

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Polymer passive laser switches were made from new polymethine dyes in a polyurethane matrix. They were designed for passive mode locking in neodymium lasers emitting 1.05-1.08 um radiation. The service life of a local working zone of such a switch was found to be 10 6 pulses with an energy of 4 -6 mJ in a train. Pulse-periodic passive mode locking was achieved at frequencies 50 -100 Hz. Replacement of polyurethane acrylate composites, formed by radical polymerisation, with polyurethane matrices, formed by the polycondensation method, increased by more than one order of magnitude the main operating characteristics of the lasers.Solid-state lasers emitting ultrashort pulses are used extensively in studies of fast processes, which require high peak powers [1]. Generation of ultrashort pulses is simplest in the case of passive mode locking when saturable absorbers based on organic dyes are used [1]. Such absorbers should be highly efficient and photostable, they should have short excitedstate relaxation times, large absorption cross sections a, a reasonable service life, and be easy to use [1,2]. The last requirement is fully satisfied by solid-state passive laser switches (PLSs), particularly those with polymer matrices which are coloured by organic dyes [3][4][5][6][7][8]. Replacement of liquid PLSs with solid switches increases the reproducibility of the temporal and energy parameters of the output radiation [5,7] and simplifies greatly laser design. Passive switches [4,5] which are free films without facilities for mechanical displacement of the working zone are unsuitable for pulse-periodic lasers and have to be handled carefully because of their low resistance to abrasion. It is much preferable to adopt a triplex block configuration [3,6,7] in which a coloured polymer film is sandwiched between optical substrates that ensure the removal of heat, prevent penetration of atmospheric oxygen, and protect the polymer film from mechanical damage.We investigated the operating characteristics of our new PLSs based on a polyurethane matrix coloured with polymethine dyes and intended for the emission range A las = 1.05 -

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Optical Properties and Applications of Near Infrared Dyes in Polymeric Media

Przhonska

1998

Near-Infrared Dyes for High Technology Applications

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Polymer active and passive laser elements made of organic dyes

Cited by 21 publications

References 9 publications

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

Highly stable polymethine-dye-based polymer switches for passive mode locking in neodymium lasers

Optical Properties and Applications of Near Infrared Dyes in Polymeric Media

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