Amplified spontaneous emission and gain from optically pumped films of dye-doped polymers

Lu, Wu; Zhong, Bo; Ma, Dongge

doi:10.1364/ao.43.005074

Cited by 60 publications

(33 citation statements)

References 14 publications

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“…In order to provide guidelines for the comparison of organic materials, a systematic description of gain properties is introduced. In fact this field has remained largely unexplored, apart from a few works on particular concentrations of specific dye molecules [26][27][28][29]. For this purpose, our experimental test-beds are dye-doped polymer thin-film lasers based on commercial laser dyes, namely DCM, Rhodamine 640 (RH640) and Pyrromethene 605 (PM605), embedded in a passive matrix, in conventional configurations such as Amplified Spontaneous Emission (ASE) and Fabry-Perot like cavities, see Fig.1.…”

Section: Introductionmentioning

confidence: 99%

Gain properties of dye-doped polymer thin films

et al. 2015

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Hybrid pumping appears as a promising compromise in order to reach the much coveted goal of an electrically pumped organic laser. In such configuration the organic material is optically pumped by an electrically pumped inorganic device on chip. This engineering solution requires therefore an optimization of the organic gain medium under optical pumping. Here, we report a detailed study of the gain features of dye-doped polymer thin films. In particular we introduce the gain efficiency K, in order to facilitate comparison between different materials and experimental conditions. The gain efficiency was measured with various setups (pump-probe amplification, variable stripe length method, laser thresholds) in order to study several factors which modify the actual gain of a layer, namely the confinement factor, the pump polarization, the molecular anisotropy, and the re-absorption. For instance, for a 600 nm thick 5 wt% DCM doped PMMA layer, the different experimental approaches give a consistent value K ≃ 80 cm.MW −1 . On the contrary, the usual model predicting the gain from the characteristics of the material leads to an overestimation by two orders of magnitude, which raises a serious problem in the design of actual devices. In this context, we demonstrate the feasibility to infer the gain efficiency from the laser threshold of well-calibrated devices. Besides, temporal measurements at the picosecond scale were carried out to support the analysis.

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Section: Introductionmentioning

confidence: 99%

Gain properties of dye-doped polymer thin films

et al. 2015

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“…The wide use of organic dyes and dye doped polymers in optical and optoelectronic applications has produced a renewed interest in the area of laser dyes [1][2][3][4][5]. The broad spectral range covering the blue to the IR region, the high efficiency, the large spectral bandwidth, and fairly simple implementation offer unique operational flexibility for dye lasers.…”

Section: Introductionmentioning

confidence: 99%

Study of solvent effect in laser emission from Coumarin 540 dye solution

et al. 2007

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The results of a brief investigation of the amplified spontaneous emission and lasing characteristics of Coumarin 540 dye in as many as ten different solvents are reported. It has been found that C 540 dye solutions contained within a rectangular quartz cuvette give laser emission with well resolved equally spaced modes when pumped with a 476 nm beam. The modes were found to originate from the subcavities formed by the plane-parallel walls of the cuvette containing the high-gain medium. While the quantum yield remains a decisive factor, a clear correlation between the total width of the emission spectra and the refractive indices of the solvents of the respective samples has been demonstrated. The well-resolved mode structure exhibited by the emission spectra gives clear evidence of the lasing action taking place in the gain medium, and the number of modes enables us to compare the gain of the media in different samples. A detailed discussion of the solvent effect in the lasing characteristics of C540 in different solutions is given.

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“…The slit width was adjusted by a manual micrometer drive. In contrast to other optical setups, where a cylindrical lens was used to form a thin stripe [31,38], the large aspect ratio of the pump spot originated directly from the laser diode emission characteristics. The slit was imaged, deflected by a dichroic mirror, onto the sample surface by lens L3 creating a 400 µm by 20 µm stripe.…”

Section: Optical Setupmentioning

confidence: 99%

“…The dashed line represents the best fit of the proposed concentration quenching gain model. Adapted with permission from [38], The Optical Society (OSA). quenching is omitted, the gain efficiency can be approximated by [31]…”

Section: Materials Gain and Concentration Quenchingmentioning

confidence: 99%

Material gain concentration quenching in organic dye-doped polymer thin films

Vogelbacher¹,

Zhou²,

Huang³

et al. 2019

Opt. Mater. Express

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The optimization of material gain in optically pumped dye-doped polymer thin films is an important task in the development of organic solid-state lasers. In this work, we present a theoretical model that accommodates the influence of concentration quenching on material gain and employ it to study the novel dye molecule 2-(4-(bis(4-(tert-butyl)phenyl)amino)benzylidene)malononitrile (PMN) and the well-established dye molecule 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) embedded in poly(methyl methacrylate) (PMMA). Polycarbonate was tested as an alternative host material for PMN. The material gain in these dyedoped polymer thin films was determined by the variable stripe length method. The inclusion of concentration quenching in the material gain expression is able to significantly reduce the overestimation of the gain efficiency inherent to a linear model.

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Amplified spontaneous emission and gain from optically pumped films of dye-doped polymers

Cited by 60 publications

References 14 publications

Gain properties of dye-doped polymer thin films

Gain properties of dye-doped polymer thin films

Study of solvent effect in laser emission from Coumarin 540 dye solution

Material gain concentration quenching in organic dye-doped polymer thin films

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