公开(公告)号：US11476964B2

公开(公告)日：2022-10-18

申请号：US17529112

申请日：2021-11-17

Applicant: X Development LLC

Inventor： Jesse Lu ,  Brian Adolf ,  Martin Schubert

IPC: H04B10/07 ,  H04J14/02 ,  H04B10/073 ,  G06N3/08 ,  G05B19/4097 ,  G06F30/20 ,  H04J14/00 ,  H04B10/079

Abstract: Embodiments of techniques for inverse design of physical devices are described herein, in the context of generating designs for photonic integrated circuits (including a multi-channel photonic demultiplexer). In some embodiments, an initial design of the physical device is received, and a plurality of sets of operating conditions for fabrication of the physical device are determined. In some embodiments, the performance of the physical device as fabricated under the sets of operating conditions is simulated, and a total performance loss value is backpropagated to determine a gradient to be used to update the initial design. In some embodiments, instead of simulating fabrication of the physical device under the sets of operating conditions, a robustness loss is determined and combined with the performance loss to determine the gradient.

公开(公告)号：US11379633B2

公开(公告)日：2022-07-05

申请号：US16432538

申请日：2019-06-05

Applicant: X Development LLC

Inventor： Brian Adolf ,  Martin Schubert ,  Jesse Lu

IPC: G06F30/20 ,  G05B19/4097

Abstract: A technique for simulating and optimizing the fabrication and design of a physical device is described. The technique includes executing a fabrication simulation of the physical device with a fabrication model that receives a fabrication specification as input and outputs a structural design for the physical device in response to the fabrication simulation. An operational simulation of the physical device is executed with a design model that simulates a field response propagating through a simulated environment of the physical device. The structural design output from the fabrication model is forward cascaded to the design model and an output from backpropagation of a performance loss error through the design model is reverse cascaded to the fabrication model.

公开(公告)号：US20220026635A1

公开(公告)日：2022-01-27

申请号：US17490622

申请日：2021-09-30

Applicant: X Development LLC

Inventor： Martin Schubert ,  Brian Adolf ,  Jesse Lu

IPC: G02B6/12 ,  G06F30/23

Abstract: A two-channel photonic demultiplexer includes an input region to receive a multi-channel optical signal, two output regions, each adapted to receive a corresponding one of two distinct wavelength channels demultiplexed from the multi-channel optical signal, and a dispersive region including a first material and a second material inhomogeneously interspersed to form a plurality of interfaces that collectively structure the dispersive region to optically separate each of the two distinct wavelength channels from the multi-channel optical signal and respectively guide the first distinct wavelength channel to a first output region and the second distinct wavelength channel to the second output region when the input region receives the multi-channel optical signal. At least one of the first material or the second material is structured within the dispersive region to be schematically reproducible by a feature shape with a pre-determined width.

公开(公告)号：US20210357554A1

公开(公告)日：2021-11-18

申请号：US17387082

申请日：2021-07-28

Applicant: X Development LLC

Inventor： Brian Adolf ,  Martin Schubert ,  Jesse Lu

IPC: G06F30/20 ,  G06F30/17

Abstract: A system, apparatus, and method for optimizing structural parameters of a physical device are described. The method includes receiving an initial description of the physical device describing the structural parameters within a simulated environment. The method further includes performing a simulation of the physical device in response to an excitation source to determine a performance metric of the physical device. The simulation environment includes one or more absorbing boundaries for attenuation of an output of the excitation source during the simulation. The method further includes recording attenuated field values of the simulated environment associated with the attenuation during the simulation. The method further includes determining a loss metric based on a difference between the performance metric and a target performance metric, backpropagating the loss metric using the attenuated field values, and generating a revised description of the physical device by updating the structural parameters to reduce the loss metric.

公开(公告)号：US11157163B1

公开(公告)日：2021-10-26

申请号：US17036454

申请日：2020-09-29

Applicant: X Development LLC

Inventor： Jesse Lu ,  Martin Schubert

IPC: G06F3/0488 ,  G06F3/041

Abstract: Techniques for ensuring fabricability of segmented designs are provided. In some embodiments, a computing system receives a design specification to be used to create a proposed segmented design. Each segment of the proposed segmented design indicates a material within the segment. The proposed segmented design includes segments that indicate at least two different materials. The computing system chooses a segment to touch with a paintbrush pattern for a first material. The computing system updates a set of material statuses for each material based on the chosen segment. The computing system updates a set of touch statuses for each material based on the chosen segment. The choosing and updating actions are repeated until all segments are associated with a material. The computing system generates the proposed segmented design based on the sets of material statuses.

公开(公告)号：US20210149109A1

公开(公告)日：2021-05-20

申请号：US16685473

申请日：2019-11-15

Applicant: X Development LLC

Inventor： Martin Schubert ,  Brian Adolf ,  Jesse Lu

IPC: G02B6/12 ,  G06F17/50

Abstract: A two-channel photonic demultiplexer includes an input region to receive a multi-channel optical signal, two output regions, each adapted to receive a corresponding one of two distinct wavelength channels demultiplexed from the multi-channel optical signal, and a dispersive region including a first material and a second material inhomogeneously interspersed to form a plurality of interfaces that collectively structure the dispersive region to optically separate each of the two distinct wavelength channels from the multi-channel optical signal and respectively guide the first distinct wavelength channel to a first output region and the second distinct wavelength channel to the second output region when the input region receives the multi-channel optical signal. At least one of the first material or the second material is structured within the dispersive region to be schematically reproducible by a feature shape with a pre-determined width.

公开(公告)号：US20200226221A1

公开(公告)日：2020-07-16

申请号：US16244846

申请日：2019-01-10

Applicant: X Development LLC

Inventor： Jesse Lu ,  Martin Schubert ,  Brian Adolf

IPC: G06F17/50

Abstract: A method and system for optimizing structural parameters of an electromagnetic device is described that includes performing operations. The operations include performing a time-forward simulation of a field response in a simulated environment describing the electromagnetic device and extracting decomposition components from the field response to compute a loss value. The operations further include backpropagating the loss value backwards in time using the decomposition components to determine an influence of changes in the structural parameters of the electromagnetic device on the loss value. The operations further include generating a revised description of the electromagnetic device by updating the structural parameters to reduce the loss value.