High efficiency lasing of a dye-doped polymer laser with 1.06 μm pumping

Interaction of Polymethine Dyes with Detonation Nanodiamonds

“…The narrowing of its absorption band, when the concentration of DND increases from 0.0106 % to 0.0424 % (and further) should be due to a shift from the mixture of the free and bound (adsorbed) chromophores towards the greater part of the adsorbed form. Still, it turned out that curves (2) and (3) in Figure 3 cannot be obtained by a linear combination of curves (1) and (4). In water, the Bouguer-Lambert-Beer law holds for dye 2 up to a concentration of 10 À 4 mol L À 1 , while here its concentration was 6.5 × 10 À 7 mol L À 1 , i. e. in solution it could only be present as a monomer.…”

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

“…Laser generation was obtained for the first time on dyes with a polymeric active medium at 1060 nm pumping [2]. Here a conversion efficiency of 43% was achieved, corresponding to the best media samples for the visible region [166].…”

“…It is possible to increase the removal of heat by using substrates with higher thermal conductivity than glass, e.g., from sapphire. The heat removal can be further increased by using more complex polyplex constructions (multilayer sandwich structures) instead of triplexes [2,3]. Such technical processes made it possible to use polymeric passive shutters on dyes in solid-state lasers operating in a pulsed-periodic regime with frequencies up to 100 Hz, in which significant thermal effects arise in the working zone of irradiation [3].…”

“…In real devices decrease of the thermal effects is sometimes achieved by special technical solutions, e.g., the construction of sandwich structures [2,3]. The latter are a dyed layer of polymer between two optical glasses, which remove heat from the irradiation zone.…”

“…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.…”