Patents by Inventor Michael Vitic
Michael Vitic 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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Publication number: 20250044622Abstract: Driving an optical modulator is described. A control circuit generates first and second target voltages based on a target phase modulation between first and second optical waveguide arms of the optical modulator. An offset control circuit generates first and second offset signals. A linear modulator driver receives the first and second target voltages and the first and second offset signals, and generates a first output voltage for biasing the first optical waveguide arm and a second output voltage for biasing the second optical waveguide arm. Feedback circuitry can feed the first and second output voltages to the offset control circuit, which can generate the first and second offset signals using the first and second output voltages. The output voltages bias the waveguide arms so the optical modulator operates close to the target phase modulation, even in the presence of manufacturing errors.Type: ApplicationFiled: October 23, 2024Publication date: February 6, 2025Applicant: Ciena CorporationInventors: Michael Vitic, Christopher Edgar Falt
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Publication number: 20240431022Abstract: Aspects of the subject disclosure may include, for example, a flexible printed circuit (FPC) for interconnecting an optical device and an application specific integrated circuit (ASIC), wherein the FPC includes a first section that is configured with a first plurality of electrically conductive traces and a second section over which one or more components are disposed, and wherein the second section is configured with a second plurality of electrically conductive traces that extend from the first plurality of electrically conductive traces to the one or more components. Other embodiments are disclosed.Type: ApplicationFiled: June 20, 2023Publication date: December 26, 2024Applicant: CIENA CORPORATIONInventors: Maxime Jacques, Michael Vitic, Jean-Frédéric Gagné, Simon Paradis
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Patent number: 12158639Abstract: Driving an optical modulator is described. A control circuit generates first and second target voltages based on a target phase modulation between first and second optical waveguide arms of the optical modulator. An offset control circuit generates first and second offset signals. A linear modulator driver receives the first and second target voltages and the first and second offset signals, and generates a first output voltage for biasing the first optical waveguide arm and a second output voltage for biasing the second optical waveguide arm. Feedback circuitry can feed the first and second output voltages to the offset control circuit, which can generate the first and second offset signals using the first and second output voltages. The output voltages bias the waveguide arms so the optical modulator operates close to the target phase modulation, even in the presence of manufacturing errors.Type: GrantFiled: February 24, 2022Date of Patent: December 3, 2024Assignee: Ciena CorporationInventors: Michael Vitic, Christopher Edgar Falt
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Publication number: 20240347665Abstract: An avalanche photodiode includes a silicon layer on a substrate; a germanium layer on the silicon layer; and a plurality of contacts including a cathode, an anode, and at least two separate gain tuning contacts configured to adjust an electric field to tune multiplication of carriers. The at least two separate gain tuning contacts are configured to control the electric field in the germanium layer and silicon layer. The at least two separate gain tuning contacts are configured to tailor the electric field such that the multiplication of carriers is greater in the silicon layer than the germanium layer. This added gain tuning control can be used to tailor the electric field profile such that multiplication happens mostly in silicon to achieve lower excess noise and little to no bandwidth variation.Type: ApplicationFiled: June 25, 2024Publication date: October 17, 2024Applicant: Ciena CorporationInventors: Alireza Samani, Michael Vitic, Sean Sebastian O’Keefe
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Publication number: 20240310688Abstract: An optical modulator includes an optical waveguide extending a length; and a plurality of Radio Frequency (RF) electrodes configured to modulate an optical signal in the optical waveguide, wherein the RF electrodes include an RF crossing located an end of the length and that is configured to equalize the optical signal. The optical signal is equalized via destructive interference after the RF crossing for attenuating modulation amplitude. At or near the end of the length, high frequencies of the optical signal are already strongly attenuated whereas low frequencies of the optical signal are not such that the low frequencies are equalized after the RF crossing.Type: ApplicationFiled: March 13, 2023Publication date: September 19, 2024Inventors: Alexandre Delisle-Simard, Gregory Brookes, Michael Vitic
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Publication number: 20240297105Abstract: Aspects of the subject disclosure may include, for example, system, comprising a substrate having an interconnect in or on a surface of the substrate, a riser disposed over the surface, the riser being configured with one or more through riser vias for coupling to the interconnect, a device positioned over the surface, the device having one or more conductive contacts residing in a plane of the device, and one or more wire bonds coupling the one or more through riser vias with the one or more conductive contacts thereby enabling connectivity of the interconnect to be raised toward or to the plane of the device such that at least one of the one or more wire bonds has a limited physical length. Other embodiments are disclosed.Type: ApplicationFiled: March 3, 2023Publication date: September 5, 2024Applicant: CIENA CORPORATIONInventors: Michael Vitic, Maxime Jacques, Raphaël Beaupré-Laflamme
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Patent number: 12057518Abstract: An avalanche photodiode includes a silicon layer on a substrate; a germanium layer on the silicon layer; a cathode and an anode on any of the silicon layer and the germanium layer; and a plurality of contacts on the germanium layer, in addition to the cathode and the anode. The silicon layer can include a highly doped region at each end, an intrinsic doped region in a middle, and an intermediately doped region between the highly doped region at each end and the intrinsic doped region, and the cathode and the anode are each at a respective a highly doped region at each end. The germanium layer can include a plurality of highly doped regions with each including one of the plurality of contacts.Type: GrantFiled: February 4, 2022Date of Patent: August 6, 2024Assignee: Ciena CorporationInventors: Alireza Samani, Michael Vitic, Sean Sebastian O'Keefe
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Publication number: 20240248331Abstract: Disclosed are differential-drive electro-optic modulator structures for linear electro-optic (Pockels) platforms such as thin-film LiNbO3 (TFLN), directly compatible with traditional differential-output analog drivers, such as a linear electro-optic modulator, including: a first signal trace; a second signal trace, wherein the first signal trace and the second signal trace are driven by a differential signal; a first optical arm; and a second optical arm, wherein a geometry of the first signal trace and the second signal trace causes the differential signal to modulate optical signals in the first optical arm and the second optical arm, such that when the optical signals are combined to create a resultant optical signal, the geometry mitigates chirp in the resultant optical signal. Other embodiments are disclosed.Type: ApplicationFiled: April 6, 2023Publication date: July 25, 2024Applicant: CIENA CORPORATIONInventors: Maxime Jacques, Gregory Brookes, Michael Vitic, Alexandre Simard, Douglas McGhan, Ying Gao
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Patent number: 12001116Abstract: An optical waveguide structure forms an MZI in proximity to an electro-optic material. A first (second) electrical input port is configured to receive a first (second) drive signal. The second drive signal has a negative amplitude relative to the first drive signal. A first (second) transmission line is configured to propagate a first (second) electromagnetic wave over at least a portion of a first (second) optical waveguide arm to apply an optical phase modulation. A drive signal interconnection structure is configured to provide a first electrical connection between the first electrical input port and an electrode shared by the transmission lines, and a second electrical connection between the second electrical input port and respective electrodes of the transmission lines; and is configured to preserve relative phase shifts between the drive signals. Input impedances at the first and second electrical input ports are substantially equal to each other.Type: GrantFiled: June 21, 2021Date of Patent: June 4, 2024Assignee: Ciena CorporationInventors: Maxime Jacques, Jean-Frédéric Gagné, Michael Vitic
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Publication number: 20230305356Abstract: A first (second) electrical input port receives a first (second) drive signal. A first (second) transmission line is configured to propagate a first (second) electromagnetic wave over at least a portion of a first (second) optical waveguide arm of an MZI to apply an optical phase modulation. A drive signal interconnection structure is configured to provide a first electrical connection between the first electrical input port and an inner electrode shared by the transmission lines, and a second electrical connection between the second electrical input port and respective outer electrodes of the transmission lines; and is configured to preserve relative phase shifts between the drive signals. An impedance associated with a first electric field distribution between the inner electrode and a first of the outer electrodes is substantially equal to an impedance associated with a second electric field distribution between the inner electrode and a second of the outer electrodes.Type: ApplicationFiled: May 24, 2023Publication date: September 28, 2023Applicant: Ciena CorporationInventors: Maxime Jacques, Gregory Brookes, Michael Vitic, Jean-Frédéric Gagné
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Patent number: 11768392Abstract: An optical modulator includes a first Radio Frequency (RF) line and a second RF line; an optical waveguide along a length of the modulator with an input and an output; and a plurality of segments along the length including a first set of segments, a single RF line crossing, and a second set of segments, wherein the first set of segments and the second set of segments have an inversion of their respective orientation at the RF line crossing, and wherein the RF line crossing is located off center relative to the plurality of segments, wherein each of the first RF line and the second RF line extend along the length and cross one another at the RF line crossing.Type: GrantFiled: October 3, 2022Date of Patent: September 26, 2023Assignee: Ciena CorporationInventors: Christine Latrasse, Alexandre Delisle-Simard, Michel Poulin, Ian Betty, Arash Khajooeizadeh, Michael Vitic
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Patent number: 11740533Abstract: A first transmission line comprises a first pair of electrodes receiving an electrical drive comprising first and second drive signals, which are loaded by a first series of p-n junctions applying optical phase modulation to respective optical waves propagating over a first section of the first and second optical waveguide arms of an MZI. A second transmission line comprises a second pair of electrodes configured to receive the electrical drive after an electrical signal delay. The second pair of electrodes are loaded by a second series of p-n junctions applying optical phase modulation to the respective optical waves propagating over a second section of the first and second optical waveguide arms after propagation over the first section. An electrode extension structure provides the electrical drive to the second pair of electrodes, and comprises an unloaded transmission line portion imposing the electrical signal delay based on an optical signal delay.Type: GrantFiled: September 14, 2021Date of Patent: August 29, 2023Assignee: Ciena CorporationInventors: Michel Poulin, Alexandre Delisle-Simard, Michael Vitic
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Patent number: 11650475Abstract: Driving an optical modulator is described. A control circuit generates first and second input voltages based on a target phase modulation between first and second optical waveguide arms of the optical modulator. An offset control circuit generates first and second offset signals. A linear modulator driver receives the first and second offset signals, generates a first output voltage for biasing the first optical waveguide arm using the first offset signal, and generates a second output voltage for biasing the second optical waveguide arm using the second offset signal. Feedback circuitry can feed the first and second output voltages to the offset control circuit, which can generate the first and second offset signals using the first and second output voltages. The output voltages bias the waveguide arms so the optical modulator operates close to the target phase modulation, even in the presence of manufacturing errors.Type: GrantFiled: January 5, 2021Date of Patent: May 16, 2023Assignee: Ciena CorporationInventors: Michael Vitic, Christopher Edgar Falt, Alexandre Delisle-Simard, Michel Poulin
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Publication number: 20230102304Abstract: An optical modulator includes a first Radio Frequency (RF) line and a second RF line; an optical waveguide along a length of the modulator with an input and an output; and a plurality of segments along the length including a first set of segments, a single RF line crossing, and a second set of segments, wherein the first set of segments and the second set of segments have an inversion of their respective orientation at the RF line crossing, and wherein the RF line crossing is located off center relative to the plurality of segments, wherein each of the first RF line and the second RF line extend along the length and cross one another at the RF line crossing.Type: ApplicationFiled: October 3, 2022Publication date: March 30, 2023Inventors: Christine Latrasse, Alexandre Delisle-Simard, Michel Poulin, Ian Betty, Arash Khajooeizadeh, Michael Vitic
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Publication number: 20230084020Abstract: A first transmission line comprises a first pair of electrodes receiving an electrical drive comprising first and second drive signals, which are loaded by a first series of p-n junctions applying optical phase modulation to respective optical waves propagating over a first section of the first and second optical waveguide arms of an MZI. A second transmission line comprises a second pair of electrodes configured to receive the electrical drive after an electrical signal delay. The second pair of electrodes are loaded by a second series of p-n junctions applying optical phase modulation to the respective optical waves propagating over a second section of the first and second optical waveguide arms after propagation over the first section. An electrode extension structure provides the electrical drive to the second pair of electrodes, and comprises an unloaded transmission line portion imposing the electrical signal delay based on an optical signal delay.Type: ApplicationFiled: September 14, 2021Publication date: March 16, 2023Applicant: Ciena CorporationInventors: Michel Poulin, Alexandre Delisle-Simard, Michael Vitic
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Publication number: 20220404680Abstract: An optical waveguide structure forms an MZI in proximity to an electro-optic material. A first (second) electrical input port is configured to receive a first (second) drive signal. The second drive signal has a negative amplitude relative to the first drive signal. A first (second) transmission line is configured to propagate a first (second) electromagnetic wave over at least a portion of a first (second) optical waveguide arm to apply an optical phase modulation. A drive signal interconnection structure is configured to provide a first electrical connection between the first electrical input port and an electrode shared by the transmission lines, and a second electrical connection between the second electrical input port and respective electrodes of the transmission lines; and is configured to preserve relative phase shifts between the drive signals. Input impedances at the first and second electrical input ports are substantially equal to each other.Type: ApplicationFiled: June 21, 2021Publication date: December 22, 2022Applicant: Ciena CorporationInventors: Maxime Jacques, Jean-Frédéric Gagné, Michael Vitic
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Publication number: 20220336691Abstract: An avalanche photodiode includes a silicon layer on a substrate; a germanium layer on the silicon layer; a cathode and an anode on any of the silicon layer and the germanium layer; and a plurality of contacts on the germanium layer, in addition to the cathode and the anode. The silicon layer can include a highly doped region at each end, an intrinsic doped region in a middle, and an intermediately doped region between the highly doped region at each end and the intrinsic doped region, and the cathode and the anode are each at a respective a highly doped region at each end. The germanium layer can include a plurality of highly doped regions with each including one of the plurality of contacts.Type: ApplicationFiled: February 4, 2022Publication date: October 20, 2022Inventors: Alireza Samani, Michael Vitic, Sean Sebastian O'Keefe
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Patent number: 11460724Abstract: An optical modulator includes multiple segments including modulator segments and a Radio Frequency (RF) crossing segment where RF lines extending a length of the modulator cross one another. The present disclosure includes optimization of one or more of a geometry of the RF crossing and a location of the RF crossing segment along the length. The geometry is selected so that the RF crossing segment appears as another segment having similar characteristics as modulator segments. The location of the RF crossing segment is selected to balance out fabrication error and phase efficiency.Type: GrantFiled: July 31, 2020Date of Patent: October 4, 2022Assignee: Ciena CorporationInventors: Christine Latrasse, Alexandre Delisle-Simard, Michel Poulin, Ian Betty, Arash Khajooeizadeh, Michael Vitic
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Patent number: 11404596Abstract: System and methods implemented in a coherent receiver having a pair of Avalanche Photodiodes (APD) include adjusting one or more of a reverse bias voltage (VAPD) on a P-path (VAPDP) and on an N-path (VAPDN) responsive to an output (PIN,CM) that indicates electrical power of an AC common-mode input signal; adjusting a Transimpedance Amplifier (TIA) common-mode AC response, AdjCM_AC_Response, responsive to an output (POUT,CM) that indicates electrical power of an AC common-mode output signal; and/or adjusting one or more of VAPDP and VAPDN responsive to received signal Signal-to-Noise Ratio (SNR).Type: GrantFiled: April 20, 2021Date of Patent: August 2, 2022Assignee: Ciena CorporationInventors: Tom Luk, Michael Vitic, Christopher Edgar Falt
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Patent number: 11391627Abstract: A first photodiode is integrated within at least a first layer of one or more semiconductor layers, the first photodiode comprising an active area optically coupled to a guided mode of a first waveguide to couple the first photodiode to an optical distribution network. One or more associated photodiodes are associated with the first photodiode integrated within at least the first layer in proximity to the first photodiode. An active area of a single associated photodiode or a sum of active areas of multiple associated photodiodes is substantially equal to the active area of the first photodiode. None of the associated photodiodes is coupled to the optical distribution network. Electrical circuitry is configured to generate a signal that represents a difference between (1) a signal derived from the first photodiode and (2) a signal derived from a single associated photodiode or a sum of signals derived from multiple associated photodiodes.Type: GrantFiled: March 31, 2020Date of Patent: July 19, 2022Assignee: Ciena CorporationInventors: Michael Vitic, Sean Sebastian O'Keefe, Christine Latrasse