公开(公告)号：EP1658530A1

公开(公告)日：2006-05-24

申请号：EP04762482.0

申请日：2004-07-22

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  BECKER, Helmar, A. ,  SCHMID, Kay, Michael ,  SCHMITZER, Heidrun

IPC: G03H1/06 ,  G03F7/20

CPC classification number: G03F7/70408 ,  G03H1/06 ,  G03H2001/0094 ,  G03H2222/20 ,  G03H2222/33

Abstract: Disclosed is a method for producing a hologram of an object (4) by using light consisting of photon packets to illuminate the object and as reference light. Each photon packet comprises a plurality of photons that are correlated among each other in a quantum-mechanical manner and jointly form a multiphoton Fock state. According to the inventive method, one portion (8) of the photon packets is used for illuminating the object while another portion (R) thereof is used as reference light, photon packets (OL1) arriving from the object are made to interfere with the reference light in an interference field, and the brightness distribution in the interference field or a part thereof is registered by means of a detector (5). Preferably, a light source emitting a plurality of mutually coherent rays of photon packets is used for generating the photon packets, at least one of the rays being used for illuminating the object and at least one other of said rays being used as reference light or for forming the same. Moreover, preference is given to a light source generating photon pairs as photon packets.

公开(公告)号：EP1405134B1

公开(公告)日：2004-12-08

申请号：EP02742722.8

申请日：2002-05-08

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  BERESNEV, Leonid ,  PATRUSHEVA, Galina

IPC: G02F1/135

CPC classification number: G02B26/00 ,  G02B27/281

Abstract: The invention relates to an intensity-dependent light modulating device, wherein said light successively passes through a polarizer, a first phase retardation plate and a first light modulator; the light then strikes a mirror and from there on, it passes once again through the light modulator and the phase retardation plate in the opposite direction and then strikes an analyzer that is crossed relative to the polarizer. The light modulator and the phase retardation plate are respectively located in an electric field in which the indicatrices of the light modulator and the phase retardation plate are deflected, wherein the deflection of the indicatrix of the light modulator is intensity-dependent. Due to the passage of light through the phase retardation plate and the light modulator, an intensity-dependent rotation of the direction of polarization occurs in such a way that higher intensity light is filtered in the analyzer while lower intensity light is transmitted. A preferred embodiment relates to a telescope, which is directed at an intensive light source in front of a dark background, said telescope only filtering the intensive light source while the background can be simultaneously observed during almost the entire transmission.

公开(公告)号：EP1242847A1

公开(公告)日：2002-09-25

申请号：EP00993446.4

申请日：2000-11-20

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  SCHMITZER, Heidrun ,  BERESNEV, Leonid ,  DULTZ, Gisela

IPC: G02F1/01

CPC classification number: G02F1/0136

Abstract: The aim of the invention is to provide a phase modulator for introducing a topological phase which is configured for producing any given phase shift between zero and 360°. To this end, the inventive phase modulator has (a) means - at least one double refracting electro-optical delay device with a rotatable indicatrix - with which the polarisation of the light is guided on at least one closed path on the Poincaré sphere during the transmission through the modulator, said indicatrix rotating according to the selected phase shift and the amount representing the total rotating surface on the Poincaré sphere being equal to ζ.

公开(公告)号：EP1157078A1

公开(公告)日：2001-11-28

申请号：EP00906361.1

申请日：2000-02-21

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  BERESNEV, Leonid ,  HAASE, Wolfgang ,  PIKIN, Sergei, A. ,  WEYRAUCH, Thomas

IPC: C09K19/02 ,  G02F1/141

CPC classification number: C09K19/02 ,  G02F1/141 ,  Y10T428/10

Abstract: In order to provide a liquid crystalline material which has a lamellar structure and which can be used for phase modulation, a liquid crystal with curved or angular dimer molecules (1) is provided, whereby the molecules each comprise two central units (2, 3) and the longitudinal axes of both central units have angles of inclination (4, 5) with regard to layer normals z, said angles of inclination being at least approximately opposed. Due to the inventive arrangement of both central units of the dimer molecule, the molecular index ellipsoid which is essentially composed of the portions of both central units that can easily polarize is arranged such that the optic axis is always parallel to the layer normals z, and a polarization modulation of the light, said light propagating through the liquid crystalline material in a defined direction perpendicular to the layer normals, which occurs at the same time as the phase modulation can thus be prevented.

公开(公告)号：EP1055308A1

公开(公告)日：2000-11-29

申请号：EP99924996.4

申请日：1999-05-17

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  DULTZ, Gisela ,  BECKER, Helmar, A. ,  SCHMITZER, Heidrun

IPC: H04L9/08 ,  G06E1/00

CPC classification number: G02F1/21 ,  G02F1/39 ,  G02F3/00 ,  G02F2001/212 ,  H04L9/0852

Abstract: The invention relates to a method for producing a choice of either single photons or pairs of photons in an optical channel (16, 17), comprising the following steps: establishing a two-photon state (photon pair); physically separating said photon pair and obtaining the quantum mechanical correlation in the event that the photons are emitted collinearly; coupling each photon into one optical channel (14, 14', 14') respectively, one channel (15, 15', 15') containing an interferometer (7-13) with a variable difference in optical paths δ1F-δ1S and the other channel containing an optical retardation route (19) of optical length δ1; physically bringing the two channels together with a beam splitter (18, 31-36); matching the values δ1F, δ1S and δ1 in such a way that the probability K of coincidences between the outputs (16, 17) of the beam splitter can be either approximately K=0 or approximately K=1 or approximately a predetermined intermediate value, K=0 corresponding to a photon pair in one of the output channels (16, 17) of the beam splitter and K=1 corresponding to two single photons in the two output channels of the beam splitter. The invention provides a means of producing an optical separating filter or gate for either single photons or photon pairs which can be used in quantum cryptography and as a basic element of a quantum optical calculating machine.

公开(公告)号：EP1123529B1

公开(公告)日：2011-10-12

申请号：EP00965895.6

申请日：2000-08-24

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  GANZKE, Dirk ,  HAASE, Wolfgang ,  POZHIDAEV, Eugene

IPC: G02F1/141 ,  G02F1/21

CPC classification number: G02F1/141 ,  G02F2001/1414

Abstract: The invention relates to a liquid crystal modulator comprising at least one ferroelectric liquid crystal, and to a method for operating an optical liquid crystal modulator having at least one ferroelectric liquid crystal. The aim of the invention is to greatly diminish temperature-dependent influences during simultaneously short switching times. To this end, the invention provides that the ferroelectric liquid crystals have a DHF mode and an operating range of the electric field that exceeds 10 V/νm at the location of the liquid crystal. The operating frequency is preferably greater than 50 kHz.

公开(公告)号：EP1131670B1

公开(公告)日：2008-05-28

申请号：EP99955902.4

申请日：1999-10-29

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  BERESNEV, Leonid ,  HAASE, Wolfgang ,  ONOKHOV, Arkady

IPC: G02F1/1347 ,  G01J9/00

CPC classification number: G02F1/141 ,  G02F1/13471 ,  G02F2001/1414 ,  G02F2203/18

Abstract: The invention relates to an electrically controlled light modulator with subsequently arranged liquid crystal layers which are embedded between transparent plates. Said plates have a surface anisotropy which aligns the molecules of the liquid crystals and they also have electrodes to generate an electric field in said liquid crystals. At least two layers of helical smectic ferroelectric liquid crystals are arranged one behind the other in the beam path of a light beam to be modulated. The directions of the fast or slow axes of the individual layers are twisted against one another in such a manner that the polarization of the light beam is the same before and behind the modulator. The invention further provides an adaptive optical device which has a field comprising a graticule-type arrangement of light modulators. Said modulators are arranged in the beam path of the device. Every light modulator can be controlled individually to compensate losses of definition of an image to be processed which may occur point-by-point.

公开(公告)号：EP1151242B1

公开(公告)日：2008-03-19

申请号：EP99964558.3

申请日：1999-12-09

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  DULTZ, Gisela ,  FRINS, Erna ,  SCHMITZER, Heidrun

IPC: G01B11/16

CPC classification number: G01D5/344 ,  G01B11/18

Abstract: The invention relates to a sensor for detecting changes in distance between a first location and a second location, comprising an essentially helical coil-shaped optical fibre which can be mechanically connected to at least one of the locations, a light transmitter and a detection device for optical signals, said detection device having the means for emitting an output signal which is dependent on the state of polarisation of the optical signal transmitted via the optical fibre. The invention also relates to a method for detecting changes in distance between a first location and a second location, characterised by the following steps: at least one of the locations is mechanically linked to an essentially helical coil-shaped optical fibre; an optical signal with a known state of polarisation is coupled into the optical fibre; after transmission via the connection line, this signal is detected in such a way that information about its state of polarisation can be obtained; the change in distance is then determined using this information.

公开(公告)号：EP0992141B1

公开(公告)日：2006-04-05

申请号：EP98928318.9

申请日：1998-05-26

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  KOOPS, Hans, Wilfried, Peter ,  FRINS, Erna ,  MELTZ, Gerald

IPC: H04L27/28 ,  H04B10/12

CPC classification number: H04L27/28 ,  H04B10/2504

Abstract: The invention relates to a message transmission system with frequency dividing optical components. According to the invention, light pulses with different frequencies are coupled out of an optical fibre by means of fibre grating and/or photoionic crystals and imaged by focusing elements outside of the optical fibre. The fibre grating for different frequencies can be arranged in a single period or in different successive periods. The photoionic crystals can be used at the end of the optical fibre or can be etched into a channel or pit in a glass fibre. Additional delay elements ensure that light pulses with different frequencies are imaged at the same time in a predetermined chosen time ratio, in accordance with a parallel reprocessing stage.

公开(公告)号：EP1269679B1

公开(公告)日：2005-05-04

申请号：EP01919321.8

申请日：2001-02-21

Applicant: Deutsche Telekom AG

Inventor： DULTZ, Wolfgang ,  SCHMITZER, Heidrun ,  SCHMID, Kay, Michael ,  BECKER, Helmar, A.

IPC: H04L9/08 ,  G02F1/21 ,  G02F1/39

CPC classification number: H04L9/0858 ,  G02F1/0136 ,  G02F1/21 ,  G02F1/39 ,  G02F2001/212 ,  G02F2203/07

Abstract: The invention relates to a method for changing the polarisation of at least one photon of the photons which are radiated from a photon pair source to form various partial beam paths (A1, A2). Polarisation is carried out by means of an electro-optical modulator (EOM) that is arranged in the partial beam path (A1) respectively, whereby the photon to be influenced passes through said path. Said modulator can change the polarisation of a photon when in the activated state. The modulator is timely activated in such a way that the probability of presence of the photon in the area of the electro-optical modulator being in the activated state is at a maximum.