Kinetic model of irreversible photobleaching of dye-doped polymer waveguide materials

McKenna, Ed; Xue, Jiuzhi; Verdoni, A. P.; Yetzbacher, Michael K.; Fan, R.S.; Mickelson, Alan

doi:10.1364/josab.21.001294

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…As can be seen from the figures, the refractive index of the samples decreased with increasing exposure times at a constant pump power and also decreased with increasing pump powers at a constant exposure time; these results were in good agreement with theory [16,17]. This method also enabled us to obtain online and accurate data that clearly show the different processes that participate in the experiment.…”

Section: Resultssupporting

confidence: 80%

“…The sample was transparent at the wavelength used in the interferometer and the refractive index was varied and controlled by illuminating the sample by another laser beam at its absorption peak wavelength. This type of dye-doped polymer films is well known for its laser-induced refractive index changes [16][17][18]. Disperse Red1 was used at weight concentration of 10% in poly(methyl methacrylate) (PMMA).…”

Section: Methodsmentioning

confidence: 99%

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Interferometry technique to eliminate noise in interference data based on a Mach–Zehnder interferometer

et al. 2014

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Some experiments based on interferometry, such as studying refractive index changes, need a long time to be completed, and any movement or oscillation in the order of wavelength during that time may wash out the interference fringes or at least reduce the quality of the interferogram. In this work, a new technique is presented to enhance the interferometric data during such experiments. The main idea behind this technique is the use of a reference beam to monitor all surrounding changes during the experiment. Laser light was divided into two parallel beams and then entered into a Mach-Zehnder interferometer. One of the beams was used as a reference signal to measure interferometer drift and the other one was passed through the sample to measure the refractive index changes simultaneously in a single interferometer. Noise was extracted from the data with a written computer code to achieve a noise-free output.

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Section: Resultssupporting

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Interferometry technique to eliminate noise in interference data based on a Mach–Zehnder interferometer

et al. 2014

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“…Due to the intense incident laser, the molecule rotates about its double bond and may reach a phantom state [32] (peak energy state of the lower energy state (S 0 ) but is a minimum of the next excited state (T 1 )) from which it can undergo nonradiative decay to either cis π or trans π. As the decay may go in either direction, the cis-state becomes more populated and may have a long life-time to decay back to the trans π [33]. With the photoisomerization process, the number density of molecules in the ground and excited states changes, which leads to a change in the index of refraction and hence nonlinear response changes.…”

Section: Photoisomerizationmentioning

confidence: 99%

Polarization-dependent Z-scan characterization for optical nonlinearity in pyran dye

Purnima¹,

Mohan²,

Dhar³

2013

Laser Phys.

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Polarization-dependent Z-scan characterization is made for DCM (4-dicyanomethylene-2-methyl-6-p-dimethylaminostyryl-4H-pyran) dye encapsulated in a polymer matrix (DCM/PMMA). A continuous wave Ar + laser beam operating at ∼514 nm wavelength is employed as the source. The normalized transmittance for a linear, elliptical and circular polarization state of incident light with corresponding nonlinear refractive and nonlinear absorptive changes is studied. Intensity-dependent change in the refractive index ( n) and change in the absorption coefficient ( β) with photoisomerization as well as two independent tensor components χ 3 xxyy and χ 3 xyyx of third order susceptibility (χ 3 ) are reported. It is observed that nonresonant electronic nonlinearities dominate to give rise to an optical nonlinear response that can be exploited for use as optical switching.

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“…Due to their compact size and comparatively low cost semiconductor laser diodes and LEDs are particularly promising pump sources for applications in organic solid-state lasers in hand-held and point-of-care devices. Even though the lifetime of organic dyes under strong optical excitation is limited due to photobleaching [18][19][20], their use in low cost sensing applications and single-use devices might be favorable compared to more expensive semiconductor devices. The possibility to locally deposit the dye-doped polymer material on the substrate via ink-jet printing can decrease fabrication costs even further and adds additional design flexibility [21,22].…”

Section: Introductionmentioning

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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Kinetic model of irreversible photobleaching of dye-doped polymer waveguide materials

Cited by 8 publications

References 29 publications

Interferometry technique to eliminate noise in interference data based on a Mach–Zehnder interferometer

Interferometry technique to eliminate noise in interference data based on a Mach–Zehnder interferometer

Polarization-dependent Z-scan characterization for optical nonlinearity in pyran dye

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

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