Patents by Inventor Amir Ali Tavallaee
Amir Ali Tavallaee 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: 20240012147Abstract: The imaging system includes a light source having a laser cavity. A light signal resonates in the laser cavity along an optical path that includes a tunable electro-optic configured to select wavelengths in multiple different wavelength bands. Electronics tune the electro-optic such the selection of wavelengths in the wavelength bands change in response to the tuning. The optical path includes a second optical component configured to select wavelengths in multiple different second wavelength bands. The output of the laser cavity has wavelengths that are common to one of the wavelength bands and one of the second wavelength bands.Type: ApplicationFiled: July 5, 2022Publication date: January 11, 2024Inventors: Amir Ali Tavallaee, Constanze Hantschmann, Mehdi Asghari, Ayan Chakrabarty, Sepehr Ahmadzadeh Benis
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Patent number: 11815720Abstract: A waveguide heater is configured to heat an optical waveguide. The heater includes multiple heating elements and has one or two conditions selected from a group consisting of a first condition and the second condition. The first condition is the heater including multiple interior connectors that are each included in an interior electrical pathway between a pair of the heating elements where the interior connectors are connected in parallel and provide electrical communication between the heating elements included in the pair. The second condition is multiple exterior connectors that are each included in an exterior electrical pathway between electronics and a first one of the heating elements where the exterior connectors are connected in parallel and provide electrical communication between the electronics and the first heating element. The electronics are configured to apply an electrical bias to the heater. In some instances, the heater in included in a wavelength tuner.Type: GrantFiled: January 19, 2021Date of Patent: November 14, 2023Assignee: SiLC Technologies, Inc.Inventors: Amir Ali Tavallaee, Amir Hanjani, Chen Chen
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Patent number: 11581703Abstract: Systems and methods described herein are directed to optical light sources, such as an external cavity laser (ECL) with an active phase shifter. The system may include control circuitry for controlling one or more parameters associated with the active phase shifter. The phase shifter may be a p-i-n phase shifter. The control circuitry may cause variation in a refractive index associated with the phase shifter, thereby varying a lasing frequency of the ECL. The ECL may be configured to operate as a light source for a light detection and ranging (LIDAR) system based on generating frequency modulated light signals. In some embodiments, the ECL may generate an output LIDAR signal with alternating segments of increasing and decreasing chirp frequencies. The ECL may exhibit increased stability and improved chirp linearities with less dependence on ambient temperature fluctuations.Type: GrantFiled: September 20, 2020Date of Patent: February 14, 2023Assignee: SiLC Technologies, Inc.Inventors: Amir Ali Tavallaee, Behnam Behroozpour, Bradley Jonathan Luff, Mehdi Asghari
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Patent number: 11500077Abstract: A laser system includes a resonant laser cavity configured to output a laser signal. The system also includes a utility waveguide configured to receive the laser signal from the laser cavity. The utility waveguide includes a perturbation region that is external to the laser cavity and receives the laser signal from the laser cavity and outputs a laser beam. The perturbation region includes one or more perturbation structures that each causes one or more perturbation(s) in the index of refraction of the utility waveguide. The perturbation structures are selected to provide optical feedback to the resonant laser cavity such that a power versus wavelength distribution in the laser beam is different from the power versus wavelength distribution that would be in the laser signal in the absence of the perturbation structures.Type: GrantFiled: October 22, 2019Date of Patent: November 15, 2022Assignee: SiLC Technologies, Inc.Inventor: Amir Ali Tavallaee
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Patent number: 11381056Abstract: A light source has a resonant laser cavity with an optical grating and a waveguide that has a longitudinal axis. A portion of the longitudinal axis extends through the optical grating and serves as a grating axis. The laser cavity is configured to generate a laser signal that exits the laser cavity through the optical grating. The optical grating includes multiple perturbation structures that each causes a perturbation in an effective refractive index of the waveguide. The perturbation structures are staggered on the waveguide such that the perturbation structures that are adjacent to one another in a longitudinal direction are spaced apart in a transverse direction. The longitudinal direction is a direction parallel to the grating axis and the transverse direction is a direction transverse to the longitudinal direction.Type: GrantFiled: February 28, 2020Date of Patent: July 5, 2022Assignee: SiLC Technologies, Inc.Inventors: Amir Ali Tavallaee, Bradley Jonathan Luff, Mehdi Asghari
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Publication number: 20220094140Abstract: Systems and methods described herein are directed to optical light sources, such as an external cavity laser (ECL) with an active phase shifter. The system may include control circuity for controlling one or more parameters associated with the active phase shifter. The phase shifter may be a p-i-n phase shifter. The control circuitry may cause variation in a refractive index associated with the phase shifter, thereby varying a lasing frequency of the ECL. The ECL may be configured to operate as a light source for a light detection and ranging (LIDAR) system based on generating frequency modulated light signals. In some embodiments, the ECL may generate an output LIDAR signal with alternating segments of increasing and decreasing chirp frequencies. The ECL may exhibit increased stability and improved chirp linearities with less dependence on ambient temperature fluctuations.Type: ApplicationFiled: September 20, 2020Publication date: March 24, 2022Inventors: Amir Ali Tavallaee, Behnam Behroozpour, Bradley Jonathan Luff, Mehdi Asghari
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Publication number: 20210349197Abstract: A LIDAR system has multiple optical components. At least one of the optical components is configured to output a LIDAR output signal that travels away from the LIDAR system and can be reflected by an object located outside of the LIDAR system. The LIDAR system also includes electronics configured to operate one or more of the optical components so as to tune the frequency of the LIDAR output signal without changing an amplitude of the LIDAR output signal.Type: ApplicationFiled: May 8, 2020Publication date: November 11, 2021Inventors: Amir Ali Tavallaee, Behnam Behroozpour, Mehdi Asghari
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Publication number: 20210273396Abstract: A light source has a resonant laser cavity with an optical grating and a waveguide that has a longitudinal axis. A portion of the longitudinal axis extends through the optical grating and serves as a grating axis. The laser cavity is configured to generate a laser signal that exits the laser cavity through the optical grating. The optical grating includes multiple perturbation structures that each causes a perturbation in an effective refractive index of the waveguide. The perturbation structures are staggered on the waveguide such that the perturbation structures that are adjacent to one another in a longitudinal direction are spaced apart in a transverse direction. The longitudinal direction is a direction parallel to the grating axis and the transverse direction is a direction transverse to the longitudinal direction.Type: ApplicationFiled: February 28, 2020Publication date: September 2, 2021Inventors: Amir Ali Tavallaee, Bradley Jonathan Luff, Mehdi Asghari
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Publication number: 20210116552Abstract: A laser system includes a resonant laser cavity configured to output a laser signal. The system also includes a utility waveguide configured to receive the laser signal from the laser cavity. The utility waveguide includes a perturbation region that is external to the laser cavity and receives the laser signal from the laser cavity and outputs a laser beam. The perturbation region includes one or more perturbation structures that each causes one or more perturbation(s) in the index of refraction of the utility waveguide. The perturbation structures are selected to provide optical feedback to the resonant laser cavity such that a power versus wavelength distribution in the laser beam is different from the power versus wavelength distribution that would be in the laser signal in the absence of the perturbation structures.Type: ApplicationFiled: October 22, 2019Publication date: April 22, 2021Inventor: Amir Ali Tavallaee
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Patent number: 10522975Abstract: An optical system includes a laser die that includes a gain medium and multiple laser waveguides that are each configured to guide a different laser light signal through the gain medium. Each of the laser waveguides outputs a laser light signal at a wavelength. The laser waveguides are arranged in multiple candidate groups. Each candidate group includes multiple laser waveguides. The wavelength spacing of the laser waveguides is the same or substantially the same in different candidate groups.Type: GrantFiled: June 23, 2017Date of Patent: December 31, 2019Assignee: Mellanox Technologies Silicon Photonics Inc.Inventors: Albert Michael Benzoni, Bhavin Bijlani, Amir Ali Tavallaee
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Publication number: 20180375288Abstract: An optical system includes a laser die that includes a gain medium and multiple laser waveguides that are each configured to guide a different laser light signal through the gain medium. Each of the laser waveguides outputs a laser light signal at a wavelength. The laser waveguides are arranged in multiple candidate groups. Each candidate group includes multiple laser waveguides. The wavelength spacing of the laser waveguides is the same or substantially the same in different candidate groups.Type: ApplicationFiled: June 23, 2017Publication date: December 27, 2018Inventors: Albert Michael Benzoni, Bhavin Bijlani, Amir Ali Tavallaee
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Publication number: 20180006433Abstract: A laser chip including a laser cavity that produces multiple laser outputs. A laser waveguide guides light through the laser cavity and has multiple output facets. Each of the laser outputs passes through one of the output facets. The laser waveguide guides the laser outputs such that the angle between the exit direction of different laser outputs is less than 180°. The exit direction for a laser output is the direction of propagation of light in the laser waveguide at one of the output facets.Type: ApplicationFiled: June 29, 2016Publication date: January 4, 2018Inventors: Dazeng Feng, Bhavin Bijlani, Amir Ali Tavallaee, Bradley Jonathan Luff
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Patent number: 9705278Abstract: An optical system includes a laser cavity on a base. The laser cavity generates a light signal in response to application of an electrical current to the laser cavity. The system includes first electronics that apply a target level of the electrical current to the laser cavity so as to cause the laser cavity to generate the light signal. The light signal experiences mode hops at electrical current levels that shift to higher current levels in response to increasing laser operation times. A first one of the mode hops occurs at a first current level and a second one of the mode hops occurs at a second current level that is higher than the first current level. The system also includes a phase shifter that interacts with the laser cavity so as to shift the mode hops to lower current levels than occur in the absence of the phase shifter.Type: GrantFiled: September 29, 2015Date of Patent: July 11, 2017Assignee: Mellanox Technologies Silicon Photonics Inc.Inventors: Saeed Fathololoumi, Dazeng Feng, Amir Ali Tavallaee, Jacob Levy, Pegah Seddighian, Mehdi Asghari
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Publication number: 20170093114Abstract: An optical system includes a laser cavity on a base. The laser cavity generates a light signal in response to application of an electrical current to the laser cavity. The system includes first electronics that apply a target level of the electrical current to the laser cavity so as to cause the laser cavity to generate the light signal. The light signal experiences mode hops at electrical current levels that shift to higher current levels in response to increasing laser operation times. A first one of the mode hops occurs at a first current level and a second one of the mode hops occurs at a second current level that is higher than the first current level. The system also includes a phase shifter that interacts with the laser cavity so as to shift the mode hops to lower current levels than occur in the absence of the phase shifter.Type: ApplicationFiled: September 29, 2015Publication date: March 30, 2017Inventors: Saeed Fathololoumi, Dazeng Feng, Amir Ali Tavallaee, Jacob Levy, Pegah Seddighian, Mehdi Asghari
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Publication number: 20160373191Abstract: An optical link transmits light between a transmitter and a receiver. The transmitter includes a laser cavity that outputs a laser light signal. The laser cavity is configured such that the mode of the laser light signal hops during operation of the optical link. The transmitter outputs an output light signal that includes light from the laser light signal. The output light signal travels a data travel distance before being received at the receiver. The data travel distance is greater than 0 m and less than 1 km and the optical link has a Bit Error Rate less than 10?12. In some instances, the laser cavity is an external cavity laser.Type: ApplicationFiled: June 16, 2015Publication date: December 22, 2016Inventors: Saeed Fathololoumi, Dazeng Feng, Amir Ali Tavallaee, Jacob Levy, Pegah Seddighian, Mehdi Asghari