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Goldenberg L.M.,Wildau University of Applied Sciences | Lisinetskii V.,Wildau University of Applied Sciences | Gritsai Y.,Institute of Thin Film Technology and Microsensorics | Stumpe J.,Fraunhofer Institute for Applied Polymer Research | Schrader S.,Wildau University of Applied Sciences
Optical Materials Express | Year: 2012

A distributed-feedback laser, operating in the spectral range of 590-670 nm is reported. The laser device is based on surface relief grating providing a second order DFB structure. The surface relief grating is inscribed in an azobenzene-containing material and an active layer realized in high refractive index poly(phenylquinoxaline) matrix. It is shown that the design of laser device provides for the possibility of simple replacement of an active layer. This allows, in particular, laser wavelength tuning without rewriting of the surface relief grating. ©2011 Optical Society of America.


Smirnova T.N.,Ukrainian Academy of Sciences | Sakhno O.V.,Fraunhofer Institute for Applied Polymer Research | Fitio V.M.,Lviv Polytechnic | Gritsai Y.,Institute of Thin Film Technology and Microsensorics | Stumpe J.,Fraunhofer Institute for Applied Polymer Research
Laser Physics Letters | Year: 2014

This letter reports on the optimized design and operation performance of a second order distributed feedback (DFB) dye laser based on an active organic waveguide with a volume Bragg grating. The DFB gratings were inscribed holographically in a dye-doped organic nanocomposite containing high refractive index inorganic nanoparticles. In this work we experimentally investigated and theoretically analyzed the influence of waveguide and grating parameters on the spectral and energy characteristics of this kind of DFB laser in order to obtain a narrow-band emission of low divergence. We will show that a tailored improvement of the waveguide and grating parameters provides a low-threshold laser emission in the spectral range of 570-620 nm with a linewidth of less than 0.05 nm and an output beam profile close to a Gaussian distribution. © 2014 Astro Ltd.


Sakhno O.V.,Fraunhofer Institute for Applied Polymer Research | Gritsai Y.,Institute of Thin Film Technology and Microsensorics | Stumpe J.,Fraunhofer Institute for Applied Polymer Research
Laser Physics Letters | Year: 2014

In the present work we report low-threshold distributed feedback (DFB) lasing from electrically tunable holographic polymer-liquid crystal transmission gratings of POLIPHEM type doped with pyrromethene 567. Due to their uniform droplet-free micro-morphology, the POLIPHEM gratings possess high diffraction efficiency and excellent optical quality. Second-order lasing with a threshold of ∼0.8 μJ/pulse and a bandwidth of ∼1 nm was achieved under the excitation of a frequency-doubled Nd:YAG laser operating at 532 nm. The laser emission wavelength was tuned from 572-625 nm by varying the grating period. Application of an electric field switches off or tunes the lasing intensity. An electrically-induced blue-shift of the output laser emission was observed. © 2014 Astro Ltd.


Goldenberg L.M.,Wildau University of Applied Sciences | Lisinetskii V.,Wildau University of Applied Sciences | Gritsai Y.,Institute of Thin Film Technology and Microsensorics | Stumpe J.,Fraunhofer Institute for Applied Polymer Research | Schrader S.,Wildau University of Applied Sciences
Advanced Materials | Year: 2012

Distributed feedback (DFB) lasers are produced directly in fluorescent azobenzene-containing materials using a single holographic optical step. Surface relief grating capable of producing images in fluorescence microscopy can be holographically formed in a number of materials. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Gritsai Y.,Institute of Thin Film Technology and Microsensorics | Goldenberg L.M.,Institute of Thin Film Technology and Microsensorics | Goldenberg L.M.,Wildau University of Applied Sciences | Stumpe J.,Fraunhofer Institute for Applied Polymer Research
Optics Express | Year: 2011

Large aspect ratio 3D microstructures (arrays of square posts and linear rectangular gratings) fabricated in a number of azobenzene-containing materials by soft lithography were manipulated by a single beam of polarized light. The materials exhibited different response to the beam orientation and the direction of light polarization. An elongation of the square posts both along and perpendicular to the polarization plane was observed depending on material. Reversibility of the deformation has been demonstrated. Broadening of the hills, amplitude and shape changing were observed for linear gratings. A slanted expose led to the blazed asymmetric structures. Some aspects of light-induced deformation mechanisms in azobenzene-containing materials are discussed. The approach developed in the paper can be useful both for the understanding of mass transport mechanism in azobenzene-containing materials and for the fabrication of diffracted optical structures. © 2011 Optical Society of America.

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