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公开(公告)号：US20190179064A1
公开(公告)日：2019-06-13
申请号：US15838498
申请日：2017-12-12
摘要： A polarization insensitive optical phased array is provided, for LIDAR or other purposes. A polarization rotator splitter or two-dimensional grating coupler provides two components of co-polarized (e.g. TE-polarized) light. Each component can be routed to a separate optical phased array (OPA) component, and light output of one of the OPA components is rotated in polarization by use of a half wave plate. A polarization controller can receive and control the two components of co-polarized light and then passes the controlled light to the two OPA components. A single OPA component can also be used along with a controller which combines the two components of co-polarized light into a single output, passed to the single OPA component.
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公开(公告)号：US20190293794A1
公开(公告)日：2019-09-26
申请号：US15936240
申请日：2018-03-26
摘要： A coherent LIDAR method and apparatus are provided, in which two optical signals having a first frequency difference are reflected by an object. A difference in frequency between the corresponding received and reflected signals is determined. The frequency difference between the reflected signals differs from the first frequency difference due to Doppler effects. The object velocity is determined based on a comparison between the first frequency difference and the frequency difference in the reflected signals. The emitted signals can be produced by modulating a common light source. The reflected signals are inherently mixed at the receiver and further processed. Distance to the object can be determined by pulsing the emitted signals and measuring a time of flight by detecting corresponding pulse edges in the reflected signals, or by using phase sweeping. The emitter can be implemented using an optical phased array.
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公开(公告)号：US20210157179A1
公开(公告)日：2021-05-27
申请号：US17101114
申请日：2020-11-23
申请人： Antonino CALA' LESINA , Pierre Simon Joseph BERINI , Lora RAMUNNO , Dominic John GOODWILL , Eric BERNIER
发明人： Antonino CALA' LESINA , Pierre Simon Joseph BERINI , Lora RAMUNNO , Dominic John GOODWILL , Eric BERNIER
摘要： A pixel for creating an optical phase change includes a transparent electrical insulator, a first electrical conductor disposed on the transparent electrical insulator, the first electrical conductor comprising an antenna component and a connector component, an electrical insulator disposed on the first electrical conductor, a transparent semiconductor disposed on the electrical insulator, and a second electrical conductor disposed on the transparent semiconductor. The transparent semiconductor is sufficiently thick to prevent plasmonic resonance from occurring at an interface between the transparent semiconductor and the second electrical conductor.
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公开(公告)号：US20190324201A1
公开(公告)日：2019-10-24
申请号：US15957492
申请日：2018-04-19
申请人： Dritan CELO , Dominic John GOODWILL , Eric BERNIER
发明人： Dritan CELO , Dominic John GOODWILL , Eric BERNIER
摘要： An assembly with optical gain assisted optical transposer is provided. The optical transposer which optically couples a fibre array unit and a photonic integrated circuit. The optical transposer includes one or more optical gain elements which are configured to provide optical compensation, for example optical gain to mitigate optical losses associated with multistage photonic integrated devices. According to some embodiments, the optical gain element is a semiconductor optical amplifier (SOA). According to some embodiments the photonic integrated circuit is a SiPh PIC.
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公开(公告)号：US20170317116A1
公开(公告)日：2017-11-02
申请号：US15269331
申请日：2016-09-19
申请人： Dritan CELO , Dominic John GOODWILL , Eric BERNIER
发明人： Dritan CELO , Dominic John GOODWILL , Eric BERNIER
IPC分类号： H01L27/144 , H01L31/02 , H01L31/0232 , H01L27/02
CPC分类号： H01L27/1443 , G02B6/00 , G02B6/122 , G02B2006/121 , G02B2006/12123 , G02B2006/12145 , H01L27/0248 , H01L27/14643 , H01L27/14647 , H01L27/14652 , H01L31/02019 , H01L31/02325 , H01L31/105
摘要： The present application provides an electrostatic discharge guard structure for photonic platform based photodiode systems. In particular this application provides a photodiode assembly comprising: a photodiode (such as a Si or SiGe photodiode); a waveguide (such as a silicon waveguide); and a guard structure, wherein the guard structure comprises a diode, extends about all or substantially all of the periphery of the Si or SiGe photodiode and allows propagation of light from the silicon waveguide into the Si or SiGe photodiode.
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6.发明申请公开(公告)号：US20200064547A1
公开(公告)日：2020-02-27
申请号：US15883418
申请日：2018-01-30
摘要： A photonic integrated circuit is provided that is adapted to compensate for an unintentional manufactured refractive index profile, such as a gradient, that arises due to manufacturing variance. The photonic integrated circuit including at least a thermal source and a spaced thermal sink to induce a thermal gradient in the photonic integrated circuit between the thermal source and the spaced thermal sink, the thermal gradient imparts an opposing thermal refractive index profile to correct for the manufactured refractive index profile. In some embodiments the photonic integrated circuit may be constructed with features that have an intentional structured refractive index profile that ensures any unintentional manufactured refractive index profile is correctable by the opposing thermal refractive index profile induced by the thermal source.
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公开(公告)号：US20190334621A1
公开(公告)日：2019-10-31
申请号：US15966128
申请日：2018-04-30
IPC分类号： H04B10/2575 , H04B10/69
摘要： An aspect of the disclosure provides a system for transmitting a radio frequency (RF) signal from a source to a destination. Such a system includes an RF signal source configured to produce an RF signal at a transmission frequency. The system further includes an optical transmission path for optically transmitting the RF signal towards the destination. The system also includes a feedback path for transmitting a feedback signal received proximate the destination towards the RF signal source. The feedback path includes a frequency shifter for shifting the frequency of the feedback signal to a feedback frequency different than the transmission frequency.
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公开(公告)号：US20190391240A1
公开(公告)日：2019-12-26
申请号：US16563336
申请日：2019-09-06
摘要： Aspects of the disclosure provide a system and method used for time-of-flight lidar applications. Such systems and methods include a laser and pulse clipper which produces a shuttering effect to reduce the instantaneous output power from the pulse clipper. Accordingly the output from the pulse clipper is more suitable for time-of-flight lidar applications than that initially produced by the laser. This can allow for lasers which may otherwise exceed eye safety limits to be used for time-of-flight lidar applications without exceeding the eye safety limits.
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公开(公告)号：US20180180815A1
公开(公告)日：2018-06-28
申请号：US15900014
申请日：2018-02-20
CPC分类号： G02B6/2706 , G02B6/126 , G02B6/30 , G02B6/32 , G02B6/34 , G02B2006/12107 , G02B2006/12147
摘要： An optical coupling apparatus for coupling an optical fiber to a photonic chip is described. The apparatus includes a collimating microlens for collimating light from the optical fiber; a polarization splitting beam displacer for separating the light collimated by the collimating microlens into orthogonally polarized X and Y component beams; at least one focusing microlens for directing the X and Y component beams separately onto the photonic chip; and first and second surface grating couplers (SGCs) orthogonally disposed on the photonic chip and configured for operation in a same polarization state, for coupling the X and Y component beams, respectively, to the photonic chip.
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10.发明申请公开(公告)号：US20200351216A1
公开(公告)日：2020-11-05
申请号：US16687283
申请日：2019-11-18
申请人： Hamid MEHRVAR , Dominic John GOODWILL , Yong LUO
发明人： Hamid MEHRVAR , Dominic John GOODWILL , Yong LUO
IPC分类号： H04L12/863
摘要： There is provided methods and apparatuses for transferring photonic cells or frames between a photonic switch and an electronic switch enabling a scalable data center cloud system with photonic functions transparently embedded into an electronic chassis. In various embodiments, photonic interface functions may be transparently embedded into existing switch chips (or switch cards) without changes in the line cards. The embedded photonic interface functions may provide the switch cards with the ability to interface with both existing line cards and photonic switches. In order to embed photonic interface functions without changes on the existing line cards, embodiments use two-tier buffering with a pause signalling or pause messaging scheme for managing the two-tier buffer memories.
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