Patents by Inventor Martin Schell
Martin Schell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11838059Abstract: An optical assembly for optical signal processing including a first input for coupling in a first light signal; a second input for coupling in a second light signal; a first beam splitter for splitting the first light signal into a first part and a second part; a second beam splitter for splitting the second light signal into a first part and a second part; a superposing unit; a detector; an electronic signal processing unit; at least one actuating unit; and a delay line for generating a delay of the running time of the first part of the first light signal and of the first part of the second light signal up to the superposing unit. The delay line is configured such that the first part of the first light signal and the first part of the second light signal pass through the delay line in opposite directions.Type: GrantFiled: April 30, 2020Date of Patent: December 5, 2023Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.Inventors: Bernd Sartorius, Patrick Runge, Martin Schell
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Publication number: 20220231767Abstract: An optical assembly for optical signal processing: including a first input for coupling in a first light signal; a second input for coupling in a second light signal; a first beam splitter for splitting the first light signal into a first part and a second part; a second beam splitter for splitting the second light signal into a first part and a second part; a superposing unit; a detector; an electronic signal processing unit; at least one actuating unit; and a delay line for generating a delay of the running time of the first part of the first light signal and of the first part of the second light signal up to the superposing unit. The delay line is configured such that the first part of the first light signal and the first part of the second light signal pass through the delay line in opposite directions.Type: ApplicationFiled: April 30, 2020Publication date: July 21, 2022Inventors: Bernd Sartorius, Patrick Runge, Martin Schell
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Patent number: 11281016Abstract: A modulator assembly for modulating light comprising a first and a second electro-absorption modulator which each at least substantially only act on a polarization component of incident light; a light generating assembly for generating light which includes a first and a second polarization component; a first electro-absorption modulator for modulating the light generated by the light generating assembly, wherein the first electro-absorption modulator at least substantially only modulates the first polarization component of the light, so that the light exiting from the first electro-absorption modulator includes a modulated and an unmodulated polarization component; a polarization converter for changing the polarization direction of the light exiting from the first electro-absorption modulator.Type: GrantFiled: December 11, 2017Date of Patent: March 22, 2022Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Moritz Baier, Martin Schell, Francisco Soares
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Publication number: 20200073137Abstract: A modulator assembly for modulating light comprising a first and a second electro-absorption modulator which each at least substantially only act on a polarization component of incident light; a light generating assembly for generating light which includes a first and a second polarization component; a first electro-absorption modulator for modulating the light generated by the light generating assembly, wherein the first electro-absorption modulator at least substantially only modulates the first polarization component of the light, so that the light exiting from the first electro-absorption modulator includes a modulated and an unmodulated polarization component; a polarization converter for changing the polarization direction of the light exiting from the first electro-absorption modulator.Type: ApplicationFiled: December 11, 2017Publication date: March 5, 2020Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Moritz BAIER, Martin SCHELL, Francisco SOARES
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Patent number: 10436980Abstract: It is provided a circuit assembly, comprising at least one electronic circuit; at least one optical waveguide, wherein the core and the cladding of the optical waveguide are formed of an amorphous material; at least one carrier on which the optical waveguide is arranged; and at least one electro-optically active material layer electrically connected to the electronic circuit. The at least one electro-optically active material layer at least partially extends in the optical waveguide and the electrical connection between the electronic circuit and the at least one electro-optically active material layer is produced in that at least one electrical contact extends from the electronic circuit through at least one section of the cladding of the optical waveguide to the at least one electro-optically active material layer or is connected to a section of the electro-optically active material layer, which protrudes from the cladding of the optical waveguide.Type: GrantFiled: February 21, 2017Date of Patent: October 8, 2019Assignee: FRAUNHOFER-GESELLSCHAF T ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Moritz Kleinert, Martin Schell
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Patent number: 10288480Abstract: An optical filter for an optical data transmission system, including a substrate; a first and a second reflective structure which are spaced apart from each other such that they form a Fabry-Perot cavity, and at least one optical waveguide formed on or in the substrate, via which light can be coupled into the Fabry-Perot cavity and/or out of the Fabry-Perot cavity. The Fabry-Perot cavity formed by the first and the second reflective structure at least partly is a free-beam cavity, and the waveguide is an integrated waveguide which is formed by one or more layers arranged on the substrate, and the first and the second reflective structure are at least partly arranged in a cutout of the substrate or adjoin the cutout.Type: GrantFiled: June 1, 2016Date of Patent: May 14, 2019Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Martin Schell, Magnus Happach
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Publication number: 20190094461Abstract: It is provided a circuit assembly, comprising at least one electronic circuit; at least one optical waveguide, wherein the core and the cladding of the optical waveguide are formed of an amorphous material; at least one carrier on which the optical waveguide is arranged; and at least one electro-optically active material layer electrically connected to the electronic circuit. The at least one electro-optically active material layer at least partially extends in the optical waveguide and the electrical connection between the electronic circuit and the at least one electro-optically active material layer is produced in that at least one electrical contact extends from the electronic circuit through at least one section of the cladding of the optical waveguide to the at least one electro-optically active material layer or is connected to a section of the electro-optically active material layer, which protrudes from the cladding of the optical waveguide.Type: ApplicationFiled: February 21, 2017Publication date: March 28, 2019Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Moritz KLEINERT, Martin SCHELL
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Publication number: 20190052054Abstract: A laser arrangement includes a laser having a laser cavity, at least one cavity external to the laser, which reflects one part of the light emitted by the laser back into the laser cavity, and a voltage measuring device for measuring a voltage on an active section of the laser. By means of the measured voltage a detuning of the emission wavelength of the laser and/or a property of a material adjacent to the external cavity can be determined. The external cavity includes an optical waveguide coupled to the laser.Type: ApplicationFiled: February 10, 2017Publication date: February 14, 2019Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Magnus HAPPACH, David DE FELIPE MESQUIDA, Martin SCHELL, Norbert KEIL
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Publication number: 20180172513Abstract: An optical filter for an optical data transmission system, including a substrate; a first and a second reflective structure which are spaced apart from each other such that they form a Fabry-Perot cavity, and at least one optical waveguide formed on or in the substrate, via which light can be coupled into the Fabry-Perot cavity and/or out of the Fabry-Perot cavity. The Fabry-Perot cavity formed by the first and the second reflective structure at least partly is a free-beam cavity, and the waveguide is an integrated waveguide which is formed by one or more layers arranged on the substrate, and the first and the second reflective structure are at least partly arranged in a cutout of the substrate or adjoin the cutout.Type: ApplicationFiled: June 1, 2016Publication date: June 21, 2018Inventors: Martin Schell, Magnus Happach
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Patent number: 9753354Abstract: An analog-digital converter has an optical input stage configured to convert an analog input signal (S(t)) into a phase-modulated optical signal and to supply it to a hybrid coupler having a plurality of output waveguides, each being connected to at least one photodiode. The photodiodes are each connected to the input of an associated analog-digital converter via which an analog electrical input signal is convertible into a digital output signal. An output stage is configured to form the digital data stream at the output from the digital output signals of the analog-digital converter, and the output stage may be configured to select the output signal of the analog-digital converter which lies within a predefinable range of the amplitude and has a predefinable slope and/or is larger than a predefinable adjacent output signal.Type: GrantFiled: March 18, 2014Date of Patent: September 5, 2017Assignee: Fraunhofer Gesellschaft Zur Forderung Der Angew. Forschung E.V.Inventor: Martin Schell
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Publication number: 20160282703Abstract: An analog-digital converter has an optical input stage configured to convert an analog input signal (S(t)) into a phase-modulated optical signal and to supply it to a hybrid coupler having a plurality of output waveguides, each being connected to at least one photodiode. The photodiodes are each connected to the input of an associated analog-digital converter via which an analog electrical input signal is convertible into a digital output signal. An output stage is configured to form the digital data stream at the output from the digital output signals of the analog-digital converter, and the output stage may be configured to select the output signal of the analog-digital converter which lies within a predefinable range of the amplitude and has a predefinable slope and/or is larger than a predefinable adjacent output signal.Type: ApplicationFiled: March 18, 2014Publication date: September 29, 2016Inventor: Martin SCHELL
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Patent number: 8995495Abstract: A tunable DBR laser including: an amplifier section, a part-reflecting optical output, a connection section connected to the amplifier section, and at least two wavelength-selective reflectors optically coupled to the amplifier section via the connection section. The connection section includes at least one MMI coupler and several waveguides, so that different optical paths lead from the amplifier section to the wavelength-selective reflectors and each of the different optical paths leads through the at least one MMI coupler and through one of the waveguides. The wavelength-selective reflectors differ from one another by having different reflection spectra and each of the wavelength-selective reflectors is connected to one of several outputs of the at least one MMI coupler. By activating a phase shifter, arranged in a course of at least one of the waveguides, the DBR laser can be switched between different resonators.Type: GrantFiled: December 10, 2012Date of Patent: March 31, 2015Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.Inventors: Martin Schell, Patrick Runge
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Patent number: 8971726Abstract: A network element has at least one input, to which an optical signal can be fed, and at least one output, which is equipped to emit an optical signal; a first coupler having an input linked to the network element input and a first and a second output; an optical receiver having at least one input coupled to the second output of the first coupler and at least one output; an optical sender having at least one input of which is linked to the output of the optical receiver; a signal processing device being arranged in the signal path; a second coupler having a first input linked to the first output of the first coupler, a second input linked to the output of the optical sender, and an output which is linked to the first output of the network element.Type: GrantFiled: January 10, 2011Date of Patent: March 3, 2015Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Martin Schell, Philipp Vorreau
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Publication number: 20150023382Abstract: A tunable DBR laser including: an amplifier section, a part-reflecting optical output, a connection section connected to the amplifier section, and at least two wavelength-selective reflectors optically coupled to the amplifier section via the connection section. The connection section includes at least one MMI coupler and several waveguides, so that different optical paths lead from the amplifier section to the wavelength-selective reflectors and each of the different optical paths leads through the at least one MMI coupler and through one of the waveguides. The wavelength-selective reflectors differ from one another by having different reflection spectra and each of the wavelength-selective reflectors is connected to one of several outputs of the at least one MMI coupler. By activating a phase shifter, arranged in a course of at least one of the waveguides, the DBR laser can be switched between different resonators.Type: ApplicationFiled: December 10, 2012Publication date: January 22, 2015Inventors: Martin Schell, Patrick Runge
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Patent number: 8478093Abstract: A multimode interference coupler includes at least one supply waveguide and at least one output waveguide, wherein the coupler has along its longitudinal extent in the direction of the supply waveguide at least one longitudinal section in which the refractive index has a locally oscillating profile in a direction running substantially at right angles to the direction of the supply waveguide. A method for the structural configuration of such a multimode interference coupler.Type: GrantFiled: August 28, 2009Date of Patent: July 2, 2013Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Reinhard Kunkel, Martin Schell, Inigo Molina-Fernandez, Gonzalo Wangümert Perez, Alejandro Ortega Monux
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Publication number: 20130022361Abstract: A network element has at least one input, to which an optical signal can be fed, and at least one output, which is equipped to emit an optical signal; a first coupler having an input linked to the network element input and a first and a second output; an optical receiver having at least one input coupled to the second output of the first coupler and at least one output; an optical sender having at least one input of which is linked to the output of the optical receiver; a signal processing device being arranged in the signal path; a second coupler having a first input linked to the first output of the first coupler, a second input linked to the output of the optical sender, and an output which is linked to the first output of the network element.Type: ApplicationFiled: January 10, 2011Publication date: January 24, 2013Inventors: Martin Schell, Philipp Vorreau
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Patent number: 8295656Abstract: The invention relates to a method and to an apparatus for compensating the polarization-dependent shift of the center frequency in an optical filter comprising an interferometer by way of compensating the birefringence in at least one waveguide of the interferometer, wherein at least one half-wave plate is arranged into the optical path of the interferometer and at least a section of the waveguide (16, 17) on the right and on the left of the half-wave plate (11) is brought to a pre-selectable temperature, and wherein at least one section on the right of the half-wave plate (11) is brought to a first temperature T1, and at least one section on the left of the half-wave plate (11) is brought to a second temperature T2.Type: GrantFiled: June 23, 2008Date of Patent: October 23, 2012Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Martin Schell, Norbert Keil, Huihai Yao, Crispin Zawadzki
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Publication number: 20110164847Abstract: A multimode interference coupler includes at least one supply waveguide and at least one output waveguide, wherein the coupler has along its longitudinal extent in the direction of the supply waveguide at least one longitudinal section in which the refractive index has a locally oscillating profile in a direction running substantially at right angles to the direction of the supply waveguide. A method for the structural configuration of such a multimode interference coupler.Type: ApplicationFiled: August 28, 2009Publication date: July 7, 2011Inventors: Reinhard Kunkel, Martin Schell, Inigo Molina-Fernandez, Gonzalo Wangüemert Perez, Alejandro Ortega Monux
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Publication number: 20100209039Abstract: The invention relates to a method and to an apparatus for compensating the polarization-dependent shift of the center frequency in an optical filter comprising an interferometer by way of compensating the birefringence in at least one waveguide of the interferometer, wherein at least one half-wave plate is arranged into the optical path of the interferometer and at least a section of the waveguide (16, 17) on the right and on the left of the half-wave plate (11) is brought to a pre-selectable temperature, and wherein at least one section on the right of the half-wave plate (11) is brought to a first temperature T1, and at least one section on the left of the half-wave plate (11) is brought to a second temperature T2.Type: ApplicationFiled: June 23, 2008Publication date: August 19, 2010Inventors: Martin Schell, Norbert Keil, Huihai Yao, Crispin Zawadzki
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Patent number: 5794045Abstract: A device for creating and analyzing larger symbolic representations without the limitations imposed by available resources of previous devices is disclosed. More specifically, a debugger for debugging a symbolic representation of a program is disclosed. The debugger comprising means for inputting a set of characteristics, means for linking the set of characteristics to the symbolic representation, means for identifying a first portion of the symbolic representation mutually exclusive from the set of characteristics, and means for analyzing a second portion of the symbolic representation for the set of characteristics wherein the second portion being mutually exclusive from the first portion. A method of debugging programs using the debugger, in addition to the resultant debugged program, is also disclosed.Type: GrantFiled: December 18, 1996Date of Patent: August 11, 1998Assignee: Lucent Technologies Inc.Inventors: William Martin Schell, Kanwar Jit Singh, Guy Ashley Story, Pasupathi Ananta Subrahmanyam