Spiekermann
Stefan Spiekermann, Darmstadt DE
Patent application number | Description | Published |
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20080308222 | NANOPARTICULATE PREPARATION - The invention relates to nanoparticulate preparations containing at least one mixed metal oxide in the form of supramagnetic, nanoscale particles, methods for heating such a preparation, and methods for producing and dissolving adhesive compounds on the basis of said preparations. | 12-18-2008 |
20090133822 | NANOPARTICULATE PREPARATION - The invention relates to nanoparticulate preparations containing at least one mixed metal oxide in the form of supramagnetic, nanoscale particles, methods for heating such a preparation, and methods for producing and dissolving adhesive compounds on the basis of said preparations. | 05-28-2009 |
Stefan Spiekermann, Hannover DE
Patent application number | Description | Published |
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20110243158 | MICROCRYSTAL LASER FOR GENERATING LASER PULSES - A microcrystal laser for generating laser pulses has a laser resonator which has a laser medium arranged between two mirrors; and an arrangement for stabilizing the optical path length is provided. The laser resonator has a saturable absorber medium for pulse generation. | 10-06-2011 |
20140169390 | WAVELENGTH-STABILIZED MICROCRYSTAL LASER - A microcrystal laser assembly including a gain-crystal includes a frame having a high thermal conductivity. The frame has a base with two spaced apart portions extending from the base. The gain-crystal has a resonator output minor on one surface thereof. The gain-crystal is supported on the spaced-apart portions of the frame in the space therebetween. Another resonator minor is supported in that space, spaced apart from the output mirror, on a pedestal attached to the base of the frame. The pedestal and the frame have different CTE. Varying the frame temperature varies the spacing between the resonator minors depending on the CTE difference between the pedestal and the frame. | 06-19-2014 |
20140241386 | SHORT-PULSED COMPACT MOPA - A master oscillator power amplifier (MOPA) system includes an oscillator having a neodymium-doped gadolinium vanadate gain-medium and delivering seed-pulses. A length of single mode fiber is used to broaden the spectrum of the seed pulse. An amplifier having a neodymium-doped yttrium vanadate gain-medium amplifies the spectrally broadened seed-pulses. The gain-spectrum of the amplifier partially overlaps the broadened pulse-spectrum, providing spectral selection of the seed-pulses in addition to amplification. This provides amplified output-pulses having a duration about one-third that of the corresponding seed-pulses. | 08-28-2014 |
20140301422 | MICROCRYSTAL LASER FOR GENERATING LASER PULSES - A microcrystal laser for generating laser pulses has a laser resonator which has a laser medium arranged between two mirrors; and an arrangement for stabilizing the optical path length is provided. The laser resonator has a saturable absorber medium for pulse generation. | 10-09-2014 |
Stefan Spiekermann, Hanover DE
Patent application number | Description | Published |
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20150103854 | WAVELENGTH-STABILIZED MICROCRYSTAL LASER - A microcrystal laser assembly including a gain-crystal includes a frame having a high thermal conductivity. The frame has a base with two spaced apart portions extending from the base. The gain-crystal has a resonator output mirror on one surface thereof. The gain-crystal is supported on the spaced-apart portions of the frame in the space therebetween. Another resonator minor is supported in that space, spaced apart from the output mirror, on a pedestal attached to the base of the frame. The pedestal and the frame have different CTE. Varying the frame temperature varies the spacing between the resonator mirrors depending on the CTE difference between the pedestal and the frame. | 04-16-2015 |
Stefan Spiekermann, Göttingen DE
Patent application number | Description | Published |
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20150198823 | FARADAY ROTATOR FOR AN OPTICAL ISOLATOR - A Faraday rotator includes two magnet sub-assemblies assemblies spaced apart and aligned with each other with a gap therebetween. Each magnet sub-assembly includes a central magnet magnetized in direction parallel to the gap. The central magnet is sandwiched between two end magnets magnetized in a direction perpendicular to the gap. A magneto-optic crystal is located in the gap between the central magnets. | 07-16-2015 |