Patents by Inventor Seyed Mohammadreza Fatemi

Seyed Mohammadreza Fatemi 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).

  • Patent number: 10838222
    Abstract: An optical phased array includes, in part, a multitude of receiving elements arranged along N rows and M columns, and a controller configured to activate a first subset of the receiving elements during a first time interval to capture first data representative of a first image of a target, to activate a second subset of the receiving elements during a second time interval to capture second data representative of a second image of the target, and to combine the first and second data to generate the image of the target. The first and second subsets may share common receiving elements. The controller may be further configured to compute an average of the first and second data to generate the image of the target. The first subset may represent a subset of the M columns.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: November 17, 2020
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Aroutin Khachaturian, Seyed Mohammadreza Fatemi, Seyed Ali Hajimiri
  • Patent number: 10727586
    Abstract: A communicate device includes transmitters and a receiver. The first transmitter is coupled to a first 90° phase shifter that is also coupled to a first antenna, and to a second 90° phase shifter that is also coupled to a first node. The second transmitter is coupled to a third 90° phase shifter that is also coupled to a second antenna, and to a fourth 90° phase shifter that is also coupled to the first node. The receiver is coupled to a fifth 90° phase shifter that is also coupled to the first antenna, and to a sixth 90° phase shifter that is also coupled to the second antenna. A non-reciprocal element, coupled between the receiver and the first node, provides a 90° phase shift from the receiver to the first node and a ?90° phase shift from the first node to the receiver.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: July 28, 2020
    Assignee: California Institute of Technology
    Inventors: Parham Porsandeh Khial, Seyed Mohammadreza Fatemi, Alexander D. White, Seyed Ali Hajimiri
  • Publication number: 20200099451
    Abstract: An optical phased array, includes, in part, K beam processors each adapted to receive a different one of K optical signals and generate N optical signals in response. The difference between the phases of optical signals aLM and aL(M+1) is the same for all Ms, where M is an integer ranging from 1 to N?1 defining the signals generated by a beam processor, and L is an integer ranging from 1 to K defining the beam processor generating the K optical signals. The transmitter further includes, in part, a combiner adapted to receive the N×K optical signals from the K beam processors and combine the K optical signals from different ones of the K beam processors to generate N optical signals. The transmitter further includes, in part, N radiating elements each adapted to transmit one of the N optical signals.
    Type: Application
    Filed: July 1, 2019
    Publication date: March 26, 2020
    Inventors: Seyed Mohammadreza Fatemi, Aroutin Khachaturian, Seyed Ali Hajimiri
  • Publication number: 20200099131
    Abstract: A communicate device includes transmitters and a receiver. The first transmitter is coupled to a first 90° phase shifter that is also coupled to a first antenna, and to a second 90° phase shifter that is also coupled to a first node. The second transmitter is coupled to a third 90° phase shifter that is also coupled to a second antenna, and to a fourth 90° phase shifter that is also coupled to the first node. The receiver is coupled to a fifth 90° phase shifter that is also coupled to the first antenna, and to a sixth 90° phase shifter that is also coupled to the second antenna. A non-reciprocal element, coupled between the receiver and the first node, provides a 90° phase shift from the receiver to the first node and a ?90° phase shift from the first node to the receiver.
    Type: Application
    Filed: July 17, 2019
    Publication date: March 26, 2020
    Inventors: Parham Porsandeh Khial, Seyed Mohammadreza Fatemi, Alexander D. White, Seyed Ali Hajimiri
  • Publication number: 20190293956
    Abstract: An optical phased array includes, in part, a multitude of receiving elements arranged along N rows and M columns, and a controller configured to activate a first subset of the receiving elements during a first time interval to capture first data representative of a first image of a target, to activate a second subset of the receiving elements during a second time interval to capture second data representative of a second image of the target, and to combine the first and second data to generate the image of the target. The first and second subsets may share common receiving elements. The controller may be further configured to compute an average of the first and second data to generate the image of the target. The first subset may represent a subset of the M columns.
    Type: Application
    Filed: February 12, 2019
    Publication date: September 26, 2019
    Inventors: Aroutin Khachaturian, Seyed Mohammadreza Fatemi, Seyed Ali Hajimiri
  • Publication number: 20190293973
    Abstract: An electro-optical includes, in part, a multitude of phase modulators each of which includes, in part, a p-type semiconductor region, an n-type semiconductor region, and a ?(2) insulating dielectric material disposed between the p-type and n-type semiconductor regions. The electro-optical device may be a phased array in which each phase modulator is associated with a different one of the transmitting elements of the phased array. The ?(2) insulating dielectric material may be an organic polymer. The electro-optical device may further include, in part, a multitude of sensors each associated with a different one of the phase modulators. Each sensor is adapted to receive a phase modulated signal generated by the sensor's associated phase modulator. The electro-optical device may further include, in part, a multitude of amplitude modulators each associated with a different one of the multitude of phase modulators.
    Type: Application
    Filed: February 13, 2019
    Publication date: September 26, 2019
    Inventors: Aroutin Khachaturian, Seyed Mohammadreza Fatemi, Seyed Ali Hajimiri
  • Patent number: 10382140
    Abstract: A sparse optical phased array transmitter/receiver includes, in part, a multitude of transmitting/receiving elements that are sparsely positioned. Accordingly, the transmitting/receiving elements are not uniformly distributed at equal distance intervals along a one-dimensional, two-dimensional, or a three-dimensional array. The positions of the transmitting/receiving elements may or may not conform to an ordered pattern.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: August 13, 2019
    Assignee: CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Seyed Mohammadreza Fatemi, Seyed Ali Hajimiri, Behrooz Abiri, Aroutin Khachaturian
  • Publication number: 20190132052
    Abstract: An optical phased array includes a first multitude of optical transmitting/receiving elements (elements) positioned along a periphery of a first circular path. The phased array may further include a second multitude of optical elements positioned along a periphery of a second circular path concentric with the first circular path, and a third multitude of optical elements positioned along a periphery of a third circular path concentric with the first and second circular paths. The second circular path has a radius that is longer than the radius of the first circular path but shorter than the radius of the third circular. The number of the second multitude of optical elements is greater than the number of the first multitude of optical elements by N elements, and the number of the third multitude of optical elements is greater than the number of the second multitude of optical elements by M elements.
    Type: Application
    Filed: September 25, 2018
    Publication date: May 2, 2019
    Inventors: Artsroun Darbinian, Seyed Ali Hajimiri, Aroutin Khachaturian, Seyed Mohammadreza Fatemi
  • Publication number: 20190089460
    Abstract: A co-prime transceiver attains higher fill factor, improved side-lobe rejection, and higher lateral resolution per given number of pixels. The co-prime transceiver includes in part, a transmitter array having a multitude of transmitting elements and a receiver array having a multitude of receiving elements. The distance between each pair of adjacent transmitting elements is a first integer multiple of the whole or fraction of the wavelength of the optical. The distance between each pair of adjacent receiving elements is a second integer multiple of the whole or fraction of the wavelength of the optical signal. The first and second integers are co-prime numbers with respect to one another. The transceiver is fully realizable in a standard planar photonics platform in which the spacing between the elements provides sufficient room for optical routing to inner elements.
    Type: Application
    Filed: March 9, 2018
    Publication date: March 21, 2019
    Inventors: Aroutin Khachaturian, Seyed Ali Hajimiri, Behrooz Abiri, Seyed Mohammadreza Fatemi
  • Publication number: 20190056499
    Abstract: An optical phased array (OPA) includes, in part, a multitude of phase control elements disposed along N rows and M columns forming an N×M array. The phase control elements disposed along ith row are coupled to ith row signal line and phase control elements disposed along jth column are coupled to jth column signal line. The OPA further includes, in part, a row select block having N switches each configured to couple one of the N rows of the phase control elements to a digital-to-analog converter (DAC) in response to a row select signal. The OPA further includes, in part, a column select block having M switches each configured to couple one of the M rows of the phase control elements to a ground terminal in response to a column select signal.
    Type: Application
    Filed: February 13, 2018
    Publication date: February 21, 2019
    Inventors: Seyed Mohammadreza Fatemi, Aroutin Khachaturian, Behrooz Abiri, Seyed Ali Hajimiri
  • Publication number: 20190028623
    Abstract: A lens-less imaging device, includes, in part, a multitude of pixels each having a light detector and an associated optical element adapted to cause the pixel to be responsive to a different direction of light received from a target. Each pixel has a field of view that overlaps with a field of view of at least a subset of the remaining pixels. The optical element may be a transparent dielectric element, a transparent MEMS component, a transparent microlens, or include one or more metallic walls. The optical element may be a continuous mapping layer formed over the pixels. Each pixel may or may not have a Gaussian distribution response. The lens-less imaging device forms an image of a target in accordance with an optical transfer functions of the pixels as well as responses of the pixels to the light received from the target.
    Type: Application
    Filed: July 23, 2018
    Publication date: January 24, 2019
    Inventors: Seyed Ali Hajimiri, Seyed Mohammadreza Fatemi, Aroutin Khachaturian, Parham Porsandeh Khial, Alexander D. White
  • Publication number: 20180123699
    Abstract: A sparse optical phased array transmitter/receiver includes, in part, a multitude of transmitting/receiving elements that are sparsely positioned. Accordingly, the transmitting/receiving elements are not uniformly distributed at equal distance intervals along a one-dimensional, two-dimensional, or a three-dimensional array. The positions of the transmitting/receiving elements may or may not conform to an ordered pattern.
    Type: Application
    Filed: June 7, 2017
    Publication date: May 3, 2018
    Inventors: Seyed Mohammadreza Fatemi, Seyed Ali Hajimiri, Behrooz Abiri, Aroutin Khachaturian
  • Publication number: 20170324162
    Abstract: A phased array includes, in part, M×N photonic chips each of which includes, in part, an array of transmitters and an array of receivers. At least one of M and/or N is an integer greater than one. The transmitter arrays in each pair of adjacent photonics chips are spaced apart by a first distance and the receiver arrays in each pair of adjacent photonics chips are spaced apart by a second distance. The first and second distances are co-prime numbers. Optionally, at least a second subset of the M×N photonic chips is formed by rotating a first subset of the M×N photonic chips.
    Type: Application
    Filed: May 4, 2017
    Publication date: November 9, 2017
    Inventors: Aroutin Khachaturian, Seyed Ali Hajimiri, Behrooz Abiri, Seyed Mohammadreza Fatemi