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公开(公告)号：US20240353729A1
公开(公告)日：2024-10-24
申请号：US18302491
申请日：2023-04-18
Applicant: Cisco Technology, Inc.
Inventor： Rajat SHARMA , Donald J. ADAMS , Attila MEKIS , Gianlorenzo MASINI
CPC classification number: G02F1/217 , G01S7/4816
Abstract: The present disclosure describes photodetectors with multiple inputs and methods of operating photodetectors with multiple inputs. An apparatus includes a substrate, an optical absorber, an optical device, and a tuner. The optical absorber is positioned on the substrate. The optical device produces a first optical signal and a second optical signal from an optical signal received at a first port of the optical device and directs the first optical signal and the second optical signal to the optical absorber. The tuner adjusts a first phase of the first optical signal and a second phase of the second optical signal such that a reflection of the first optical signal from the optical absorber destructively interferes with a reflection of the second optical signal from the optical absorber at the first port.
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公开(公告)号：US20240369772A1
公开(公告)日：2024-11-07
申请号：US18310433
申请日：2023-05-01
Applicant: Cisco Technology, Inc.
Inventor： Roman BRUCK , Shawn X. WANG , Attila MEKIS
IPC: G02B6/293
Abstract: Certain embodiments of the present disclosure are directed towards an optical assembly such as a wavelength multiplexers/demultiplexers (MDM). One example optical assembly generally includes: one or more wavelength filters configured to separate a plurality of wavelengths of an optical signal into respective optical signals; and a lens array comprising a first angled facet configured to reflect the optical signal to the one or more wavelength filters, wherein the lens array is configured to receive one or more of the respective optical signals from the one or more wavelength filters and focus the one or more of the respective optical signals before reaching an optical interface for a photonic chip.
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公开(公告)号：US20240356656A1
公开(公告)日：2024-10-24
申请号：US18302360
申请日：2023-04-18
Applicant: Cisco Technology, Inc.
Inventor： Rajat SHARMA , Fatemeh REZAEIFAR BAYAT , Attila MEKIS , Gianlorenzo MASINI
CPC classification number: H04B10/67 , G02B6/12016 , G02B2006/12035 , G02B2006/12159
Abstract: The present disclosure describes photodetectors with multiple inputs and methods of operating photodetectors with multiple inputs. An apparatus includes a substrate, an optical absorber, and an optical device. The optical absorber is positioned on the substrate. The optical absorber includes a first portion and a second portion coupled to the first portion along a line. The optical device produces a first optical signal and a second optical signal based on a received optical signal and directs the first optical signal through the first portion of the optical absorber in a direction substantially parallel to the line. The optical device also directs the second optical signal through the second portion of the optical absorber in the direction substantially parallel to the line.
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公开(公告)号：US20240038920A1
公开(公告)日：2024-02-01
申请号：US17816255
申请日：2022-07-29
Applicant: Cisco Technology, Inc.
Inventor： Fatemeh REZAEIFAR BAYAT , Kam Yan HON , Attila MEKIS , Gianlorenzo MASINI
IPC: H01L31/107
CPC classification number: H01L31/1075
Abstract: A photodetector includes a substrate, a first optical absorber, and a second optical absorber. The first optical absorber is disposed in the substrate along a direction of propagation of an optical signal through the substrate. The first optical absorber is offset in the substrate according to an offset of the optical signal in a direction orthogonal to the direction of propagation. The second optical absorber is disposed in the substrate along the direction of propagation of the optical signal. The second optical absorber is offset in the substrate according to the offset of the optical signal in the direction orthogonal to the direction of propagation.
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公开(公告)号：US20240243214A1
公开(公告)日：2024-07-18
申请号：US18156301
申请日：2023-01-18
Applicant: Cisco Technology, Inc.
Inventor： Rajat SHARMA , Attila MEKIS , Gianlorenzo MASINI
IPC: H01L31/107 , H01L31/0232
CPC classification number: H01L31/1075 , H01L31/02325 , H01L31/02327
Abstract: A photodetector and method of making a photodetector are disclosed. An apparatus includes a semiconductor disk, a first doped region, and a first absorption region. The first doped region is disposed within the semiconductor disk such that the first doped region extends across a center of the semiconductor disk. The first doped region has a first doping type. The first absorption region is disposed on the first doped region such that a portion of the first doped region is positioned between the center of the semiconductor disk and the first absorption region along a radius of the semiconductor disk. The first absorption region includes a second doped region with a second doping type different from the first doping type. The first absorption region is arranged to absorb an optical signal as the optical signal travels along an inner circumference of the semiconductor disk.
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Patent Agency Ranking
公开(公告)号：US20230266545A1
公开(公告)日：2023-08-24
申请号：US17652408
申请日：2022-02-24
Applicant: Cisco Technology, Inc.
Inventor： Roman BRUCK , Attila MEKIS
IPC: G02B6/42
CPC classification number: G02B6/4215 , G02B6/42
Abstract: According to an embodiment, an apparatus includes a first grating and a second grating in a stack with the first grating. The first grating includes a first plurality of scatterers in a first two-dimensional (2D) arrangement. The second grating includes a second plurality of scatterers in a second 2D arrangement. The first grating and the second grating are arranged to redirect a first optical signal and a second optical signal traveling through the stack. The first optical signal enters the stack in a first direction, and the second optical signal enters the stack in a second direction different from the first direction. Each of the second plurality of scatterers is offset from a corresponding scatterer of the first plurality of scatterers in a third direction different from the first and second directions. Other embodiments include a method performed by the apparatus.
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公开(公告)号：US20230244031A1
公开(公告)日：2023-08-03
申请号：US18297373
申请日：2023-04-07
Applicant: Cisco Technology, Inc.
Inventor： Roman BRUCK , Thierry J. PINGUET , Attila MEKIS
Abstract: End-face coupling structures within an electrical backend are provided via photonic integrated circuit (PIC), comprising: a first plurality of spacer layers; a second plurality of etch-stop layers, wherein each etch-stop layer of the second plurality of etch-stop layers is located between two spacer layers of the first plurality of spacer layers; and an optical coupler comprising a plurality of waveguides arranged as a waveguide array configured to receive an optical signal in a direction of travel, wherein each waveguide of the plurality of waveguides is located at a layer interface defined between an etch-stop layer and a spacer layer. Portions of the PIC can be formed by depositing layers of spacer and etch-stop materials in which cavities are formed to define the waveguides when the waveguide material is deposited or interconnects when a metal is deposited therein.
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公开(公告)号：US20220128761A1
公开(公告)日：2022-04-28
申请号：US17081852
申请日：2020-10-27
Applicant: Cisco Technology, Inc.
Inventor： Subal SAHNI , Kamal V. KARIMANAL , Gianlorenzo MASINI , Attila MEKIS , Roman BRUCK
Abstract: Embodiments include a photonic device with a compensation structure. The photonic device includes a waveguide with a refractive index which changes according to the thermo-optic effect as a temperature of the photonic device fluctuates. The compensation structure is positioned on the photonic device to counteract or otherwise alter the thermo-optic effect on the refractive index of the waveguide in order to prevent malfunctions of the photonic device.
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公开(公告)号：US20240241309A1
公开(公告)日：2024-07-18
申请号：US18156280
申请日：2023-01-18
Applicant: Cisco Technology, Inc.
Inventor： Attila MEKIS , Gianlorenzo MASINI
IPC: G02B6/12 , G01R31/317 , G02B6/42 , G02F1/225
CPC classification number: G02B6/12019 , G01R31/31728 , G02B6/4266 , G02F1/2257
Abstract: Embodiments herein described an optical system for testing the bandwidth of a photodiode (PD) in a photonic integrated circuit (PIC). In one embodiment, a first optical signal is provided to bias one or more PDs in the PIC which generate a DC bias (e.g., DC voltage) across the PD whose bandwidth is being tested. A second optical signal is directed to the PD being tested, thereby generating an AC signal. The second optical signal can be a tunable optical signal where its frequency/wavelength is varied to test the bandwidth of the PD. The AC signal generated by the PD being tested is passed through a heating element (e.g., a resistor) which generates heat. This heat is then measured by an interferometer. The output of the interferometer can be correlated to a bandwidth of the PD.
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公开(公告)号：US20240194813A1
公开(公告)日：2024-06-13
申请号：US18063540
申请日：2022-12-08
Applicant: Cisco Technology, Inc.
Inventor： Kam Yan HON , Fatemeh REZAEIFAR BAYAT , Attila MEKIS , Gianlorenzo MASINI
IPC: H01L31/103 , H01L31/18
CPC classification number: H01L31/1037 , H01L31/184
Abstract: A photodetector includes a substrate, an absorber, a first doped region, and a second doped region. The absorber includes a first region and a second region that is more heavily doped than the first region. The first doped region is positioned on the substrate such that the first doped region contacts the second region of the absorber. A portion of the first doped region is positioned between the absorber and the substrate. The second doped region is positioned on the substrate such that the second doped region contacts the first region of the absorber rather than the second region of the absorber. A portion of the second doped region is positioned between the absorber and the substrate. The portion of the second doped region extends across a majority of a width of the absorber.
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