Patents by Inventor Guifang Li
Guifang Li 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: 20240135118Abstract: A hybrid analog and digital computational system is created by receiving equations in which a set of solution values is unknown. A residual iterative algorithm is implemented to solve the set of solution values for the equations. The residual iterative algorithm includes an outer update loop computed using a digital computing device with a set of residue values initially set to a first initial value and a set of solution update values set to a second initial value. The residual iterative algorithm includes an inner residual loop, which is iteratively computed using an analog accelerator until one or more inner residual loop stopping criteria is met and returning the set of solution update values. Next, the set of solution updates are used to update the set of residue values and a range of a next set of solution update values, thereby adjusting a computational precision of the inner residual loop.Type: ApplicationFiled: February 19, 2021Publication date: April 25, 2024Inventors: Pang SHUO, Guifang LI, Zheyuan ZHU
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Patent number: 11809996Abstract: An adaptive system and a method for adjusting a parameter in the adaptive system includes operating an adaptive system with an output signal produced from an input signal applied to an input, in which a parameter with a finite range is determined based on a difference between the output signal and a target output signal. In one example the parameter with the finite range is a fixed-point parameter or an analog parameter. The parameter is accessed from the adaptive system. A probability distribution of the parameter is assigned. The finite range for the parameter is updated based on the probability distribution which has been assigned. The probability distribution function may be updated alone with the finite range of the parameter. The probability distribution may be derived from one or more historical values of the parameter, and a plurality of system parameters belonging to an identical category of data as the parameter.Type: GrantFiled: September 21, 2020Date of Patent: November 7, 2023Assignee: University of Central Florida Research Foundation, Inc.Inventors: Shuo Pang, Guifang Li, Zheyuan Zhu
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Patent number: 11668803Abstract: A few-mode light detection and ranging (LIDAR) system may include an illumination source to generate an illumination beam, one or more transmission optics to direct at least a portion of the illumination beam within a field of view, one or more collection optics to collect return light from an object in the field of view illuminated by the illumination beam, wherein the collected return light includes a plurality of spatial modes, a few-mode optical amplifier to optically amplify portions of the return light propagating along at least two of the plurality of spatial modes, and a detector configured to convert output light from the few-mode optical amplifier to an output electrical signal.Type: GrantFiled: August 22, 2019Date of Patent: June 6, 2023Assignee: University of Central Florida Research Foundation, Inc.Inventors: Rachel Sampson, Alireza Fardoost, Guifang Li, He Wen, Yuanhang Zhang, Huiyuan Liu
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Publication number: 20220164642Abstract: Photonic units for vector-vector multiplication, matrix-vector multiplication, matrix-matrix multiplication, batch matrix-matrix multiplication, and tensor-tensor multiplication are described. Multiplications are through coherent mixing and square-law detection. There are many dimensions—wavelength, vector mode, quadrature, and three dimensions of space—that can be used to construct photonic accelerators. The encoded input vector or input matrix is fanned out into a desired number of copies and mixed with the corresponding encoded local oscillators containing the weight vectors comprising the weight matrix. Any subset of two (three) dimensions can be used to construct photonic accelerators for matrix-vector (matrix-matrix) multiplications. Multiple dimensions can be combined into a hyperdimension to increase the scalability.Type: ApplicationFiled: October 15, 2019Publication date: May 26, 2022Inventors: Guifang LI, Shuo PANG, He WEN
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Publication number: 20220092426Abstract: An adaptive system and a method for adjusting a parameter in the adaptive system includes operating an adaptive system with an output signal produced from an input signal applied to an input, in which a parameter with a finite range is determined based on a difference between the output signal and a target output signal. In one example the parameter with the finite range is a fixed-point parameter or an analog parameter. The parameter is accessed from the adaptive system. A probability distribution of the parameter is assigned. The finite range for the parameter is updated based on the probability distribution which has been assigned. The probability distribution function may be updated alone with the finite range of the parameter. The probability distribution may be derived from one or more historical values of the parameter, and a plurality of system parameters belonging to an identical category of data as the parameter.Type: ApplicationFiled: September 21, 2020Publication date: March 24, 2022Inventors: Shuo PANG, Guifang LI, Zheyuan ZHU
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Patent number: 11221205Abstract: A non-destructive iterative interferometric tomographic technique for imaging and reconstruction of phase objects as well as objects with complex permittivity and, particularly, to iterative optical diffraction tomographic (iODT) imaging and reconstruction of phase objects with high refractive index (RI) contrast, complex structures, and/or large optical path differences (OPDs) against the background, which cause multiple scattering, and applications thereof.Type: GrantFiled: May 27, 2020Date of Patent: January 11, 2022Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.Inventors: Guifang Li, Shengli Fan, Seth Smith-Dryden, Bahaa Saleh
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Patent number: 11108469Abstract: A mode demultiplexing hybrid (MDH) that integrates mode demultiplexing, local oscillator power splitting, and optical 90-degree hybrid using multi-plane light conversion (MPLC). Reflective cavity and transmissive systems are disclosed. The MDH may fine advantageous application as the optical front end for a coherent receiver in a space-division multiplexing (SDM) system.Type: GrantFiled: June 19, 2020Date of Patent: August 31, 2021Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.Inventors: Guifang Li, He Wen
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Publication number: 20210242653Abstract: A power semiconductor waveguide optical amplifier (P-SWA) may include an amplifier waveguide with an invertible core formed from one or more undoped heterogeneous semiconductor layers and one or more cladding layers surrounding one or more sides of the invertible core formed as one or more undoped semiconductor layers. Pump light may be coupled into the amplifier waveguide to induce the population inversion in the invertible core. Signal light may further be coupled into the amplifier waveguide and may be amplified as it propagates through the amplifier waveguide. The signal light may then exit the amplifier waveguide as amplified signal light.Type: ApplicationFiled: February 1, 2021Publication date: August 5, 2021Inventors: Guifang Li, Patrick LiKamWa
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Publication number: 20210078875Abstract: A UV/O3/H2O2 advanced oxidation reactor includes a water inlet pipe, a water outlet pipe, an ultraviolet reactor, an H2O2 adding device and an O3 adding device. The ultraviolet reactor has a plurality of ultraviolet lamps embedded therein, and the ultraviolet lamps are arranged at an angle with respect to partition plates. The water inlet pipe is connected to a water inlet in a lower portion of the ultraviolet reactor, and the water outlet pipe is connected to a water outlet in an upper portion of the ultraviolet reactor. The H2O2 adding device and the O3 adding device are arranged on a connecting pipe of the water inlet pipe. After raw water is pressurized, H2O2 is added into the raw water through the H2O2 adding device, then ozone is added in the raw water through a water injector, and finally the raw water enters the ultraviolet reactor.Type: ApplicationFiled: April 25, 2019Publication date: March 18, 2021Applicant: SHANDONG WATER & WASTEWATER MONITORING CENTERInventors: Ruibao JIA, Wuchang SONG, Hao JIAO, Shaohua SUN, Hongbo WANG, Guifang LI
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Publication number: 20200403710Abstract: A mode demultiplexing hybrid (MDH) that integrates mode demultiplexing, local oscillator power splitting, and optical 90-degree hybrid using multi-plane light conversion (MPLC). Reflective cavity and transmissive systems are disclosed. The MDH may fine advantageous application as the optical front end for a coherent receiver in a space-division multiplexing (SDM) system.Type: ApplicationFiled: June 19, 2020Publication date: December 24, 2020Applicant: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.Inventors: Guifang Li, He Wen
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Publication number: 20200378745Abstract: A non-destructive iterative interferometric tomographic technique for imaging and reconstruction of phase objects as well as objects with complex permittivity and, particularly, to iterative optical diffraction tomographic (iODT) imaging and reconstruction of phase objects with high refractive index (RI) contrast, complex structures, and/or large optical path differences (OPDs) against the background, which cause multiple scattering, and applications thereof.Type: ApplicationFiled: May 27, 2020Publication date: December 3, 2020Inventors: Guifang Li, Shengli Fan, Seth Smith-Dryden, Bahaa Saleh
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Patent number: 10715251Abstract: A free-space optical (FSO) communication system includes a transmitter including a modulated light source and transmit optics for emitting a modulated optical signal into a FS channel toward a receiver. A receiver is coupled to receive the modulated optical signal including receive optics coupled to a few-mode (FM) pre-amplifier that is coupled to a demodulator.Type: GrantFiled: August 30, 2018Date of Patent: July 14, 2020Assignee: University of Central Florida Research Foundation, Inc.Inventor: Guifang Li
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Patent number: 10277354Abstract: An optical fiber system including an optical fiber and an optical grating is provided. The optical fiber is configured to support M mode groups, where differences in effective refractive index between adjacent mode groups are substantially equal. The optical grating is optically coupled to the optical fiber, and has a period inversely proportional to the difference in effective refractive index between adjacent mode groups. The optical grating is configured to couple all adjacent mode groups in the optical fiber.Type: GrantFiled: February 15, 2018Date of Patent: April 30, 2019Assignees: Futurewei Technologies, Inc., University of Central Florida Research Foundation, Inc.Inventors: Guifang Li, Zhihong Li, Demetrios Christodoulides, Huiyuang Liu, He Wen, Mohammadamin Eftekhar, Bin Huang
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Publication number: 20190074898Abstract: A free-space optical (FSO) communication system includes a transmitter including a modulated light source and transmit optics for emitting a modulated optical signal into a FS channel toward a receiver. A receiver is coupled to receive the modulated optical signal including receive optics coupled to a few-mode (FM) pre-amplifier that is coupled to a demodulator.Type: ApplicationFiled: August 30, 2018Publication date: March 7, 2019Inventor: GUIFANG LI
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Patent number: 9794016Abstract: In one embodiment, an optical system for processing space-multiplexed optical signals includes an input fiber that propagates multiple spatially-separated optical signals, a photonic signal processor that receives the multiple spatially-separated optical signals and simultaneously processes those signals, and an output fiber that receives at least one of the processed signals.Type: GrantFiled: October 5, 2012Date of Patent: October 17, 2017Assignee: University of Central Florida Research Foundation, Inc.Inventors: Guifang Li, Ibrahim T. Ozdur
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Publication number: 20170125490Abstract: The present disclosure relates to a pixel array and a display panel having the pixel panel. The pixel array is formed on a non-rectangular substrate, and includes: a plurality of edge pixels arranged at an edge of the non-rectangular substrate, each of which has a first boundary facing a boundary of the non-rectangular substrate, wherein the first boundary has a shape adaptive to a shape of the edge of the non-rectangular substrate; and a plurality of center pixels surrounded by the plurality of edge pixels. The pixel array and display panel can improve display effect at boundaries of a non-rectangular OLED display panel.Type: ApplicationFiled: June 10, 2016Publication date: May 4, 2017Applicant: EVERDISPLAY OPTRONICS (SHANGHAI) LIMITEDInventors: Zhi LI, Guifang LI, Xin MOU, Yanhu LI
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Patent number: 9608235Abstract: The present disclosure provides a thin film encapsulation structure for encapsulating a functional device on a substrate, including: a mixing layer thin film covering the functional device, and an inorganic layer thin film located above the mixing layer thin film, wherein the mixing layer thin film is mainly composed of amorphous aluminum oxide and a crystalline oxide. The present disclosure also provides an organic light emitting device, including a substrate, an OLED device located on the substrate, and the thin film encapsulation structure as mentioned above.Type: GrantFiled: March 7, 2016Date of Patent: March 28, 2017Assignee: EverDisplay Optronics (Shanghai) LimitedInventors: Ling Xiao, Guifang Li, Niu Hu
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Patent number: 9563011Abstract: In some embodiments, an optical transmission system includes a few-mode fiber that supports at least 2 spatial modes but no more than 50 spatial modes.Type: GrantFiled: January 27, 2011Date of Patent: February 7, 2017Assignee: University of Central Florida Research Foundation, Inc.Inventors: Guifang Li, Fatih Yaman, Xiaobo Xie, Likai Zhu, Neng Bai, Cen Xia
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Patent number: 9546094Abstract: Methods of converting silica to silicon and fabricating silicon photonic crystal fiber (PCF) are disclosed. Silicon photonic crystal fibers made by the fabrication methods are also disclosed. One fabrication method includes: sealing silica PCF and a quantity of magnesium within a container, the quantity of magnesium defined by 2Mg(g)+SiO2(s)?2MgO(s)+Si(s); converting silica PCF to a reacted PCF through magnesiothermic reduction; and converting the reacted PCF to the fabricated silicon PCF by selective dissolution of the reacted PCF in an acid. Another fabrication method includes: adding silica PCF and a quantity of solid magnesium to an unsealed container, the quantity of magnesium substantially in excess of that defined by 2Mg(g)+SiO2(s)?2MgO(s)+Si(s); converting silica PCF to a reacted PCF through magnesiothermic reduction; and converting the reacted PCF to the fabricated silicon PCF by selective dissolution of the reacted PCF in an acid.Type: GrantFiled: July 17, 2014Date of Patent: January 17, 2017Assignee: University of Central Florida Research Foundation, Inc.Inventors: Guifang Li, Fatih Yaman
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Publication number: 20160285579Abstract: Analog and digital fiber-optic telecommunication links using high-order modes in few-mode fibers (FMFs) to improve the Spurious Free Dynamic Range (SFDR) and reduce wavelength division multiplexing (WDM) penalties due to fiber nonlinearities. Methods and applications.Type: ApplicationFiled: March 23, 2016Publication date: September 29, 2016Applicant: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.Inventors: Guifang Li, He Wen