Issued Patents All Time
Showing 1–25 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7920617 | Method and device for coherent addition of semiconductor laser emission | Gregor Angelow, Franco Giulio Laeri | 2011-04-05 |
| 7769300 | Reducing the distortion of optical pulses caused by polarization mode dispersion in optical communication systems | Leonid A. Beresnev, Erna Frins, Franko Kueppers, Heidrun Schmitzer, Joachim Vobian +1 more | 2010-08-03 |
| 7649610 | Method and device for reducing speckle formation on a projection screen | Gisela Dultz, Leonid A. Beresnev, Heidrun Schmitzer | 2010-01-19 |
| 7468827 | Device for generating adding and subtracting digital sequences of optical pulses and method for secure transmission of information | Heidrun Schmitzer, Leonid A. Beresnev, Gisela Dultz | 2008-12-23 |
| 7426070 | Method and device for attenuating light as a function of intensity | Leonid A. Beresnev, Galina Patrusheve | 2008-09-16 |
| 7050213 | Method and device for attenuating light as a function of intensity | Leonid A. Beresnev, Galina Patrusheva | 2006-05-23 |
| 7003665 | Method for the secure transmission of messages | Eric Hildebrandt, Heidrun Schmitzer, Gisela Dultz | 2006-02-21 |
| 6986056 | Method and arrangement for generating binary sequences of random numbers | Gisela Dultz, Eric Hildebrandt, Heidrun Schmitzer | 2006-01-10 |
| 6975800 | Fused silica-based optical waveguide and method for its manufacture | Walter Heitmann, Karl-Friedrich Klein | 2005-12-13 |
| 6952296 | Method and device for forming the intensity profile of a laser beam | Leonid A. Beresnev, Rosemarie Hild, Bernhard Hils | 2005-10-04 |
| 6947193 | Optical phase modulator | Heidrun Schmitzer, Leonid A. Beresnev, Gisela Dultz | 2005-09-20 |
| 6941048 | Optical fiber transmission link having passive, directionally dependent attenuation | Volker Maier, Jörg Happ, Werner Frank | 2005-09-06 |
| 6914647 | Electro-optical light modulator | Leonid A. Beresnev, Wolfgang Haase, Arkadii Onokhov | 2005-07-05 |
| 6900874 | Device and method for the temperature-independent operation of electro-optical switches on the basis of ferroelectric liquid crystals having a deformed helix | Dirk Ganzke, Wolfgang Haase, Eugene Pozhidaev | 2005-05-31 |
| 6884990 | METHOD FOR CHANGING THE POLARIZATION OF AT LEAST ONE OF THE PHOTONS EMITTED FROM A PHOTON-PAIR SOURCE INTO VARIOUS PARTIAL PATHS OF RAYS, AND METHOD FOR OPTIONALLY GENERATING INDIVIDUAL PHOTONS OR PHOTON PAIRS IN AN OPTICAL CHANNEL | Heidrun Schmitzer, Kay Michael Schmid, Helmar A. Becker | 2005-04-26 |
| 6813424 | Optical communications link | Gisela Dultz, Erna Frins, Heidrun Schmitzer | 2004-11-02 |
| 6748081 | Quantum cryptography system for a secure transmission of random keys using a polarization setting method | Heidrun Schmitzer, Leonid A. Beresnev, Eric Hildebrandt | 2004-06-08 |
| 6727491 | Sensor and method for detecting changes in distance | Gisela Dultz, Erna Frins, Heidrun Schmitzer | 2004-04-27 |
| 6649087 | Liquid crystalline materials for optical phase modulation | Leonid A. Beresnev, Wolfgang Haase, Sergei Pikin, Thomas Weyrauch | 2003-11-18 |
| 6636278 | Device for the local attenuation of the light intensity in the field of vision of a light-sensitive monitoring device | Leonid A. Beresnev | 2003-10-21 |
| 6609139 | Method for generating a random number on a quantum-mechanical basis and random number generator | Gisela Dultz, Eric Hildebrandt, Heidrun Schmitzer | 2003-08-19 |
| 6563980 | Method and device for spectral level balancing in wavelength division multiplex multi-channel systems | Leonid A. Beresnev, Reinald Ries | 2003-05-13 |
| 6529666 | Single-mode optical fiber | Reiner Boness, Joachim Vobian | 2003-03-04 |
| 6501894 | Plastic optical fiber | Walter Heitmann, Erich Becker | 2002-12-31 |
| 6430345 | Method and device for producing a choice of either single photons or pairs of photons in an optical channel | Gisela Dultz, Helmar A. Becker, Heidrun Schmitzer | 2002-08-06 |