Patents by Inventor Yongming Tu
Yongming Tu 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: 20240094592Abstract: Disclosed herein is an integrated photonics device including an on-chip wavelength stability monitor. The wavelength stability monitor may include one or more interferometric components, such as Mach-Zehnder interferometers and can be configured to select among the output signals from the interferometric components for monitoring the wavelength emitted by a corresponding photonic component, such as a light source. The selection may be based on a slope of the output signal and in some examples may correspond to a working zone at or around a wavelength or wavelength range. In some examples, the interferometric components can be configured with different phase differences such that the corresponding working zones have different wavelengths. In some examples, the slopes of the output signals may be weighted based on the steepness of the slope and all of the output signals may include information for wavelength locking the measured wavelength to the target wavelength.Type: ApplicationFiled: December 1, 2023Publication date: March 21, 2024Inventors: Yi-Kuei Wu, Jason Pelc, Mark Alan Arbore, Thomas C. Greening, Matthew A. Terrel, Yongming Tu, Mohamed Mahmoud
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Publication number: 20240091739Abstract: Provided are a mercapto group-loaded layered double hydroxide (LDH)-based magnetic composite particle, and a preparation method and use thereof. The method includes: dissolving a water-soluble divalent magnesium salt and a water-soluble trivalent aluminum salt in water to obtain a mixed salt solution; pumping ammonia water into the mixed salt solution, and performing reaction I under stirring, subjecting an obtained product to centrifugation, and washing product obtained with deionized water; mixing the product with water, ethanol, and a coupling agent KH-580 to obtain a mixture, subjecting the mixture to reaction II while stirring to obtain mercapto group-loaded LDH; mixing the mercapto group-loaded LDH with ferroferric oxide and sodium alginate, adding deionized water thereto, and stirring to obtain a homogeneous mixed solution; adding the homogeneous mixed solution into a calcium chloride solution dropwise to form a magnetic bead; and leaving the magnetic bead to harden, and then washing and drying.Type: ApplicationFiled: September 8, 2023Publication date: March 21, 2024Applicants: Institute of Soil Science, CAS, China Construction Eighth Engrg Division Corp, Ltd.Inventors: Yongming LUO, Guoming Liu, Chen Tu, Shuai Yang, Xiangfeng Huang, Zhongyuan Li, Runlai Luo
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Publication number: 20240094466Abstract: Configurations for an optical system used for guiding light and reducing back-reflection back in an output waveguide is disclosed. The optical system may include an output waveguide defined in a slab waveguide. The output waveguide may terminate before an output side of the slab waveguide, which may reduce the back-reflection of light from the output side back into the output waveguide. The output side may define an optical element that may steer the output light. The optical element may collimate the output light, cause the output light to converge, or cause the output light to diverge.Type: ApplicationFiled: September 20, 2022Publication date: March 21, 2024Inventors: Mark A. Arbore, Mohsen Kamandar Dezfouli, Yongming Tu, Jeremy D. Witmer, Huiyang Deng, Alfredo Bismuto, Petr Markov
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Patent number: 11933777Abstract: A model for predicting bioavailability of arsenic in site soil and a construction method and an application thereof, includes steps of: leveling soil after selecting a measuring point, vertically placing a measuring sleeve, fully supplying water to site soil to be measured, balancing for 20-40 min, measuring a water content in a soil volume not less than 40%, placing a piston DGT device into the measuring sleeve and pressing the device into soil, covering a top of the measuring sleeve with a wind shield, cleaning the piston DGT device after the measurement, analyzing a concentration of available arsenic by ICP-MS, and measuring available arsenic of soil; linearly fitting the available arsenic measured by a DGT method with human bioavailable arsenic measured by a UBM method, and obtaining a model for predicting bioavailability of arsenic in site soil.Type: GrantFiled: October 30, 2023Date of Patent: March 19, 2024Assignee: INSTITUTE OF SOIL SCIENCE, CHINESE ACADEMY OF SCIENCESInventors: Chen Tu, Yongming Luo, Ying Liu, Guoming Liu, Shuai Yang
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Patent number: 11886007Abstract: A waveguide structure and a method for splitting light is described. The method may include optically coupling a first waveguide and a second waveguide, where the optical coupling may be wavelength insensitive. The widths of the first and second waveguides may be non-adiabatically varying and the optical coupling may be asymmetric between the first and second waveguides. A gap between the first and second waveguides may also be varied non-adiabatically and the gap may depend on the widths of the first and second waveguides. The optical coupling between the first and second waveguides may also occur in the approximate wavelength range of 800 nanometers to 1700 nanometers.Type: GrantFiled: November 11, 2022Date of Patent: January 30, 2024Assignee: Apple Inc.Inventors: Yi-Kuei Wu, Yongming Tu, Alfredo Bismuto, Andrea Trita, Yangyang Liu
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Patent number: 11852865Abstract: Configurations for an optical system with phase shifting elements are disclosed. The optical system may include a first waveguide that provides light to a second waveguide, which may be a slab waveguide. A phase shifting element may be disposed on the slab waveguide and may be heated to induce a temperature change in the slab waveguide. By increasing the temperature of the propagation region of the slab waveguide, the index of refraction of the propagation region of the slab waveguide may shift, thus causing the index of refraction of light propagating through the propagation region to shift, thus shifting the phase of the light. This may result in an optical component capable of phase shifting light for reducing coherent noise while being energy efficient and maintaining a small form factor.Type: GrantFiled: July 27, 2021Date of Patent: December 26, 2023Assignee: Apple Inc.Inventors: Yongming Tu, Alfredo Bismuto
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Patent number: 11835836Abstract: Disclosed herein is an integrated photonics device including an on-chip wavelength stability monitor. The wavelength stability monitor may include one or more interferometric components, such as Mach-Zehnder interferometers and can be configured to select among the output signals from the interferometric components for monitoring the wavelength emitted by a corresponding photonic component, such as a light source. The selection may be based on a slope of the output signal and in some examples may correspond to a working zone at or around a wavelength or wavelength range. In some examples, the interferometric components can be configured with different phase differences such that the corresponding working zones have different wavelengths. In some examples, the slopes of the output signals may be weighted based on the steepness of the slope and all of the output signals may include information for wavelength locking the measured wavelength to the target wavelength.Type: GrantFiled: September 9, 2020Date of Patent: December 5, 2023Assignee: Apple Inc.Inventors: Yi-Kuei Wu, Jason Pelc, Mark Alan Arbore, Thomas C. Greening, Matthew A. Terrel, Yongming Tu, Mohamed Mahmoud
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Publication number: 20230324286Abstract: Various embodiments disclosed herein describe optical measurement systems for characterizing a sample. The optical measurement systems may selectively emit light from different numbers of launch groups, and may include a multi-stage optical switch network that may be controlled to route light to a desired number of launch groups. The optical measurement systems may further measure light using a corresponding number of detector groups. The optical measurement systems may perform measurements using a plurality of different wavelengths, where different groups of these wavelengths may be measured using different numbers of launch groups (as well as corresponding detector groups).Type: ApplicationFiled: March 14, 2023Publication date: October 12, 2023Inventors: Jason S. Pelc, Mark A. Arbore, Matthew A. Terrel, Thomas C. Greening, Yongming Tu, Lucia Gan
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Publication number: 20230089758Abstract: Configurations for an optical system used for guiding light and reducing back-reflection back in an output waveguide is disclosed. The optical system may include an output waveguide defined in a slab waveguide. The output waveguide may terminate before an output side of the slab waveguide, which may reduce the back-reflection of light from the output side back into the output waveguide. The output side may define an optical element that may steer the output light. The optical element may collimate the output light, cause the output light to converge, or cause the output light to diverge.Type: ApplicationFiled: September 20, 2022Publication date: March 23, 2023Inventors: Yongming Tu, Jeremy D. Witmer, Huiyang Deng, Mark A. Arbore, Mohsen Kamandar Dezfouli, Alfredo Bismuto, Petr Markov
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Publication number: 20230087293Abstract: Configurations for an optical system used for guiding light and reducing back-reflection back in an output waveguide is disclosed. The optical system may include an output waveguide defined in a slab waveguide. The output waveguide may terminate before an output side of the slab waveguide, which may reduce the back-reflection of light from the output side back into the output waveguide. The output side may define an optical element that may steer the output light. The optical element may collimate the output light, cause the output light to converge, or cause the output light to diverge.Type: ApplicationFiled: September 20, 2022Publication date: March 23, 2023Inventors: Jeremy D. Witmer, Mark A. Arbore, Yongming Tu, Huiyang Deng, Mohsen Kamandar Dezfouli, Alfredo Bismuto, Petr Markov
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Publication number: 20230071329Abstract: A waveguide structure and a method for splitting light is described. The method may include optically coupling a first waveguide and a second waveguide, where the optical coupling may be wavelength insensitive. The widths of the first and second waveguides may be non-adiabatically varying and the optical coupling may be asymmetric between the first and second waveguides. A gap between the first and second waveguides may also be varied non-adiabatically and the gap may depend on the widths of the first and second waveguides. The optical coupling between the first and second waveguides may also occur in the approximate wavelength range of 800 nanometers to 1700 nanometers.Type: ApplicationFiled: November 11, 2022Publication date: March 9, 2023Inventors: Yi-Kuei Wu, Yongming Tu, Alfredo Bismuto, Andrea Trita, Yangyang Liu
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Patent number: 11561346Abstract: Configurations for a tunable Echelle grating are disclosed. The tunable Echelle grating may include an output waveguide centered in a waveguide array, with input waveguides on both sides of the output waveguide. A metal tuning pad may be located over the slab waveguide and may be heated to induce a temperature change in the slab waveguide. By increasing the temperature of the propagation region of the slab waveguide, the index of refraction may shift, thus causing the peak wavelength of the channel to shift. This may result in an optical component capable of multiplexing multiple light sources in an energy efficient manner while maintaining a small form factor.Type: GrantFiled: July 27, 2021Date of Patent: January 24, 2023Assignee: Apple Inc.Inventors: Yongming Tu, Alfredo Bismuto
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Publication number: 20230012376Abstract: Configurations for light source modules and methods for mitigating coherent noise are disclosed. The light source modules may include multiple light source sets, each of which may include multiple light sources. The light emitted by the light sources may be different wavelengths or the same wavelength depending on whether the light source module is providing redundancy of light sources, increased power, coherent noise mitigation, and/or detector mitigation. In some examples, the light source may emit light to a coupler or a multiplexer, which may then be transmitted to one or more multiplexers. In some examples, the light source modules provide one light output and in other examples, the light source modules provide two light outputs. The light source modules may provide light with approximately zero loss and the wavelengths of light may be close enough to spectroscopically equivalent respect to a sample and far enough apart to provide coherent noise mitigation.Type: ApplicationFiled: July 7, 2022Publication date: January 12, 2023Inventors: Mark Alan Arbore, Thomas C. Greening, Yongming Tu
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Patent number: 11506535Abstract: Configurations for a diffraction grating design and methods thereof are disclosed. The diffraction grating system can include an input waveguide located at a first location on or near a Rowland circle and multiple output waveguides located at a second and third location on or near the Rowland circle. The input waveguide may be located between the output waveguides and this configuration of input and output waveguides can reduce the footprint size of the device. In some examples, the optical component can function as a de-multiplexer. Additionally, the optical component may separate the input wavelength band into two output wavelength bands which are separated from one another by approximately 0.1 ?m.Type: GrantFiled: September 8, 2020Date of Patent: November 22, 2022Assignee: Apple Inc.Inventors: Yongming Tu, Alfredo Bismuto
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Patent number: 11500154Abstract: A waveguide structure and a method for splitting light is described. The method may include optically coupling a first waveguide and a second waveguide, where the optical coupling may be wavelength insensitive. The widths of the first and second waveguides may be non-adiabatically varying and the optical coupling may be asymmetric between the first and second waveguides. A gap between the first and second waveguides may also be varied non-adiabatically and the gap may depend on the widths of the first and second waveguides. The optical coupling between the first and second waveguides may also occur in the approximate wavelength range of 800 nanometers to 1700 nanometers.Type: GrantFiled: October 18, 2020Date of Patent: November 15, 2022Inventors: Yi-Kuei Wu, Yongming Tu, Alfredo Bismuto, Andrea Trita, Yangyang Liu
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Publication number: 20220091338Abstract: Configurations for a tunable Echelle grating are disclosed. The tunable Echelle grating may include an output waveguide centered in a waveguide array, with input waveguides on both sides of the output waveguide. A metal tuning pad may be located over the slab waveguide and may be heated to induce a temperature change in the slab waveguide. By increasing the temperature of the propagation region of the slab waveguide, the index of refraction may shift, thus causing the peak wavelength of the channel to shift. This may result in an optical component capable of multiplexing multiple light sources in an energy efficient manner while maintaining a small form factor.Type: ApplicationFiled: July 27, 2021Publication date: March 24, 2022Inventors: Yongming Tu, Alfredo Bismuto
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Publication number: 20220091334Abstract: Configurations for an optical system with phase shifting elements are disclosed. The optical system may include a first waveguide that provides light to a second waveguide, which may be a slab waveguide. A phase shifting element may be disposed on the slab waveguide and may be heated to induce a temperature change in the slab waveguide. By increasing the temperature of the propagation region of the slab waveguide, the index of refraction of the propagation region of the slab waveguide may shift, thus causing the index of refraction of light propagating through the propagation region to shift, thus shifting the phase of the light. This may result in an optical component capable of phase shifting light for reducing coherent noise while being energy efficient and maintaining a small form factor.Type: ApplicationFiled: July 27, 2021Publication date: March 24, 2022Inventors: Yongming Tu, Alfredo Bismuto
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Patent number: 11231319Abstract: Configurations for a diffraction grating design that mitigates thermal wavelength shifts and corresponding methods thereof are disclosed. The wavelength stability monitoring system may include a planar waveguide that receives input light directed toward a diffraction grating. The diffraction grating may reflect the light back through the planar waveguide and to one or more detectors. The planar waveguide may include multiple materials, such as a first material and a second athermal material that is adjacent to the first material. The athermal material may mitigate thermal wavelength shifts of the light. The design of the athermal material may include targeting a ratio of the input and output path lengths across sets of input and output angles of light that pass through the first material and the second athermal material. In some examples, the output waveguides may be positioned to receive leakage modes of light.Type: GrantFiled: September 8, 2020Date of Patent: January 25, 2022Assignee: Apple Inc.Inventors: Yongming Tu, Alfredo Bismuto