Patents by Inventor San-Liang Lee
San-Liang Lee 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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Patent number: 11789297Abstract: An optical phase shifter array includes: 1st˜nth optical-splitting elements, wherein each has an input end, a first output end and a second output end, and the input end of the 1st optical-splitting element receives an input light and outputs an evenly distributed optical signal to the optical-splitting element of the next stage, and n is a positive integer above 1; a plurality of first optical waveguides respectively connected to the input end of the optical-splitting element odd-numbered of the next stage and the first output end of the optical-splitting element of the previous stage; a plurality of second optical waveguides respectively connected to the input end of the optical-splitting-element even-numbered of the previous stage; and phase shifters of the 1st to the kth stage, which makes the optical signal passing through the optical waveguides produce a phase shift by heating or electro-optic effects.Type: GrantFiled: January 28, 2022Date of Patent: October 17, 2023Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: San-Liang Lee, Tsung-Han Lee, Chia-Hsuan Yang
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Publication number: 20230046072Abstract: A method for evaluating a biological effect of far infrared (FIR) includes the following. An FIR radiation source is provided to emit FIR. An FIR biological effect index (FBI) of the FIR is measured. A ratio of a blood glucose level change of an experimental group irradiated with the FIR to a blood glucose level change of a control group not irradiated with FIR is defined as the FBI. When the FBI is greater than 1, it is evaluated that the FIR causes a biological effect on an organism.Type: ApplicationFiled: May 12, 2022Publication date: February 16, 2023Applicant: National Taiwan University of Science and TechnologyInventors: San-Liang Lee, Yung-Ho Hsu, Cheng-Hsien Chen
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Publication number: 20220252914Abstract: An optical phase shifter array includes: 1st˜nth optical-splitting elements, wherein each has an input end, a first output end and a second output end, and the input end of the 1st optical-splitting element receives an input light and outputs an evenly distributed optical signal to the optical-splitting element of the next stage, and n is a positive integer above 1; a plurality of first optical waveguides respectively connected to the input end of the optical-splitting element of the odd-numbered column of the next stage and the first output end of the optical-splitting element of the previous stage; a plurality of second optical waveguides respectively connected to the input end of the optical-splitting-element of the even-numbered column of the previous stage; and phase shifters of the 1st to the kth stage, which makes the optical signal passing through the optical waveguides produce a phase shift by heating or electro-optic effects.Type: ApplicationFiled: January 28, 2022Publication date: August 11, 2022Inventors: SAN-LIANG LEE, TSUNG-HAN LEE, CHIA-HSUAN YANG
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Patent number: 11347129Abstract: A phase-controlled optical waveguide antenna array including an optical splitter, an array of phase shifters, and an optical waveguide antenna array is disclosed. The optical splitter divides the input light to a plural of optical waveguides, the phase shifter is connected to an optical waveguide of the optical splitter, and the optical waveguide antenna array is connected with the phase shifters. The optical waveguide antenna array employs periodic block structure to output a uniform light beam, and the phase shifters are tuned with adjacent thermal heaters to steer the output beam angle of the optical waveguide antenna array.Type: GrantFiled: December 4, 2020Date of Patent: May 31, 2022Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: San-Liang Lee, Chia-Hsuan Yang, Tsung-Han Lee
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Patent number: 11246499Abstract: A far-infrared emitters with physiological signal detection and method of operating the same is disclosed. A far-infrared beam module is switched on and generates far-infrared beam irradiating to a human body when a control unit starting up a microwave detecting module detecting physiological signal of the human body. The control unit is switched off when the time that the far-infrared beam irradiating on the human body reach a presetting period of time, thereby achieving the purpose of energy conservation.Type: GrantFiled: November 12, 2019Date of Patent: February 15, 2022Assignees: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, TAIPEI MEDICAL UNIVERSITYInventors: San-Liang Lee, Chao-Hsiung Tseng, Ling-Hsiu Hung, Yung-Ho Hsu, Cheng-Hsien Chen
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Publication number: 20210325762Abstract: A phase-controlled optical waveguide antenna array including an optical splitter, an array of phase shifters, and an optical waveguide antenna array is disclosed. The optical splitter divides the input light to a plural of optical waveguides, the phase shifter is connected to an optical waveguide of the optical splitter, and the optical waveguide antenna array is connected with the phase shifters. The optical waveguide antenna array employs periodic block structure to output a uniform light beam, and the phase shifters are tuned with adjacent thermal heaters to steer the output beam angle of the optical waveguide antenna array.Type: ApplicationFiled: December 4, 2020Publication date: October 21, 2021Inventors: SAN-LIANG LEE, CHIA-HSUAN YANG, TSUNG-HAN LEE
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Patent number: 11002976Abstract: A far-infrared (FIR) emitter includes at least one far-infrared source for generating a far-infrared beam, a filter unit for filtering a wavelength range of the far-infrared beam, and a beam-expanding unit for expanding the far-infrared beam. The FIR emitter can generate a FIR light of a specific wavelength range to cover an expanded projection area.Type: GrantFiled: November 7, 2018Date of Patent: May 11, 2021Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: San-Liang Lee, Ling-Hsiu Hung
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Publication number: 20200178822Abstract: A far-infrared emitters with physiological signal detection and method of operating the same is disclosed. A far-infrared beam module is switched on and generates far-infrared beam irradiating to a human body when a control unit starting up a microwave detecting module detecting physiological signal of the human body. The control unit is switched off when the time that the far-infrared beam irradiating on the human body reach a presetting period of time, thereby achieving the purpose of energy conservation.Type: ApplicationFiled: November 12, 2019Publication date: June 11, 2020Inventors: SAN-LIANG LEE, CHAO-HSIUNG TSENG, LING-HSIU HUNG, YUNG-HO HSU, CHENG-HSIEN CHEN
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Publication number: 20200018980Abstract: A far-infrared (FIR) emitter includes at least one far-infrared source for generating a far-infrared beam, a filter unit for filtering a wavelength range of the far-infrared beam, and a beam-expanding unit for expanding the far-infrared beam. The FIR emitter can generate a FIR light of a specific wavelength range to cover an expanded projection area.Type: ApplicationFiled: November 7, 2018Publication date: January 16, 2020Inventors: SAN-LIANG LEE, LING-HSIU HUNG
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Publication number: 20180314008Abstract: An optical communication system and multi-channel optical transmission and reception methods are provided. A transmitter of the optical communication system includes N laser source arrays, N sub-channel couplers, and a CWDM multiplexer. Each of the laser source arrays corresponds to a CWDM wavelength channel location and outputs M sub-channel light sources corresponding to M sub-wavelength channel locations at a CWDM wavelength channel location. The N sub-channel couplers are coupled to the N laser source arrays in a one-to-one manner. Each of the sub-channel couplers respectively receives the M sub-channel light sources of the corresponding laser source array and exports the M sub-channel light sources into a same output port. The CWDM multiplexer is coupled to the N sub-channel couplers to receive output signals of the N sub-channel couplers, to combine the N output signals into a light signal, and to output the light signal to an optical fiber.Type: ApplicationFiled: August 22, 2017Publication date: November 1, 2018Applicant: National Taiwan University of Science and TechnologyInventor: San-Liang Lee
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Patent number: 9172492Abstract: The present invention discloses a time/wavelength-division multiplexed passive optical network (TWPON), which has an optical splitter (21) and a waveguide grating router (WGR) (22) disposed at a remote node (RN) (20). The optical splitter (21) and the WGR (22) can be connected in a cascade or in a parallel such that the present invention can use less number of wavelengths to increase transmission capacity or increase the number of users. A channel fault monitoring (CFM) module provided at an optical line terminal (OLT) is utilized to locate fiber breaks among distribution fibers. The TWPON of the present invention can provide TDM-PON, WDM-PON, and Hybrid PON co-existing platform with less wavelengths channel fault monitoring mechanism.Type: GrantFiled: January 15, 2015Date of Patent: October 27, 2015Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGYInventor: San-Liang Lee
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Publication number: 20150163011Abstract: The present invention discloses a time/wavelength-division multiplexed passive optical network (TWPON), which has an optical splitter (21) and a waveguide grating router (WGR) (22) disposed at a remote node (RN) (20). The optical splitter (21) and the WGR (22) can be connected in a cascade or in a parallel such that the present invention can use less number of wavelengths to increase transmission capacity or increase the number of users. A channel fault monitoring (CFM) module provided at an optical line terminal (OLT) is utilized to locate fiber breaks among distribution fibers. The TWPON of the present invention can provide TDM-PON, WDM-PON, and Hybrid PON co-existing platform with less wavelengths channel fault monitoring mechanism.Type: ApplicationFiled: January 15, 2015Publication date: June 11, 2015Inventor: San-Liang LEE
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Publication number: 20130223841Abstract: The present invention discloses a time/wavelength-division multiplexed passive optical network (TWPON), which has an optical splitter (21) and a waveguide grating router (WGR) (22) disposed at a remote node (RN) (20). The optical splitter (21) and the WGR (22) can be connected in a cascade or in a parallel such that the present invention can use less number of wavelengths to increase transmission capacity or increase the number of users. The TWPON of the present invention can provide TDM-PON, WDM-PON, and Hybrid PON co-existing platform with less wavelengths channel fault monitoring mechanism.Type: ApplicationFiled: June 19, 2012Publication date: August 29, 2013Applicant: National Taiwan University of Science and TechnologyInventor: San-liang Lee
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Publication number: 20130012022Abstract: A method for larger-area fabrication of uniform silicon nanowire arrays is disclosed. The method includes forming a metal layer with a predetermined thickness on a substrate whose surface has a silicon material by a coating process, the metal layer selected from the group consisting of Ag, Au and Pt; and performing a metal-induced chemical etching for the silicon material by using an etching solution. Accordingly, a drawback that Ag nanoparticles are utilized to perform the metal-induced chemical etching in prior art is solved.Type: ApplicationFiled: January 4, 2012Publication date: January 10, 2013Applicant: National Taiwan University of Science and TechnologyInventors: Yung-Jr Hung, San-liang Lee, Kai-Chung Wu
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Publication number: 20120083128Abstract: A method for etching high-aspect-ratio features is disclosed. The method is applicable in forming a nanoscale deep trench having a smooth and angle-adjustable sidewall. The method includes: forming a patterned photoresist layer on a surface of a silicon substrate for exposing a part of the silicon substrate; and supplying a process gas simultaneously containing sulfur hexafluoride (SF6) and fluorinated carbon composition into a chamber in which the substrate in positioned for carrying out a deep reactive ion etching operation to etch the part of the silicon substrate for forming the deep trench. The method forms a nanoscale deep trench with a high silicon-to-photoresist etching selectivity.Type: ApplicationFiled: April 4, 2011Publication date: April 5, 2012Applicant: National Taiwan University of Science and TechnologyInventors: Yung-jr Hung, San-liang Lee
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Patent number: 8077385Abstract: A reconfigurable optical amplifier including a first reversible optical circulator and an optical gain device is provided. The first reversible optical circulator has four I/O ports which are respectively referred to as a first terminal, a second terminal, a third terminal, and a fourth terminal. The four I/O ports sequentially transmit an optical signal in a transmission direction of a forward circulation or a backward circulation according to a control signal. The first terminal is isolated from the adjacent fourth terminal. The optical gain device is connected between the first terminal and the adjacent fourth terminal. The second terminal and the third terminal are respectively connected to a first communication node and a second communication node.Type: GrantFiled: June 1, 2009Date of Patent: December 13, 2011Assignee: Industrial Technology Research InstituteInventors: Chun-Liang Yang, Dar-Zu Hsu, San-Liang Lee, Jian-Ting Hong
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Publication number: 20100322624Abstract: The present invention discloses a bidirectional transmission network apparatus based on a tunable rare-earth-doped fiber laser source. It is useful in wavelength-division-multiplexing access networks. The fiber ring laser not only generates downstream data traffic but also serves as the wavelength-selecting injection light source for the Fabry-Pérot lasers (or vertical cavity surface emitting lasers) located at the subscriber site. The fiber laser is constructed based on optical filtering, polarization control and noise suppression techniques.Type: ApplicationFiled: August 22, 2008Publication date: December 23, 2010Applicant: National Taiwan University of Science and TechnologyInventors: CHENG-KUANG LIU, SAN-LIANG LEE, CHIH-LUNG TSENG, JAU-JI JOU, SHU-CHUAN LIN
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Patent number: 7843564Abstract: A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other domains, such as optical wavelength, optical polarization and different output ports of optical elements. Taking optical wavelength as an example, different levels of power variation respond different outputs of wavelength variation through the use of a power-to-wavelength conversion module. An optical filter then separates the inputted optical signals with different wavelengths. The power average of a wavelength for its corresponding optical signals is further calculated by a photo detector. Thereby, the information of the power variation for the inputted optical signals at levels 1 and 0 can be obtained, and the Q-factor for the inputted optical signals is easily measured.Type: GrantFiled: August 14, 2008Date of Patent: November 30, 2010Assignee: Industrial Technology Research InstituteInventors: San-Liang Lee, Chun-Liang Yang, Dar-Zu Hsu
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Patent number: 7796258Abstract: A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other domains, such as optical wavelength, optical polarization and different output ports of optical elements. Taking optical wavelength as an example, different levels of power variation respond different outputs of wavelength variation through the use of a power-to-wavelength conversion module. An optical filter then separates the inputted optical signals with different wavelengths. The power average of a wavelength for its corresponding optical signals is further calculated by a photo detector. Thereby, the information of the power variation for the inputted optical signals at levels 1 and 0 can be obtained, and the Q-factor for the inputted optical signals is easily measured.Type: GrantFiled: August 14, 2008Date of Patent: September 14, 2010Assignee: Industrial Technology Research InstituteInventors: San-Liang Lee, Chun-Liang Yang, Dar-Zu Hsu
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Publication number: 20100135653Abstract: An optical network monitoring system and method thereof are proposed. An optical line terminal (OLT) transmits a first optical signal to a plurality of optical interference devices. After the first optical signal passes the optical interference devices, the optical interference devices reflect back a plurality of second optical signals corresponding to the optical interference devices respectively to the optical line terminal. The second optical signals have different optical path differences. An optical/electrical converter unit converts each of the second optical signals into an electrical signal. A spectrum analyzing unit analyzes the electrical signal to extract a frequency component of the electrical signal, thus the fiber connection status to each optical network unit in the optical network system could be obtained. Therefore, the purpose of monitoring the optical network system is achieved.Type: ApplicationFiled: July 14, 2009Publication date: June 3, 2010Applicant: National Taiwan University of Science and TechnologyInventors: San-liang Lee, Chun-hung Cheng, Shuen-te Ji