Patents by Inventor Shien-Kuei Liaw
Shien-Kuei Liaw 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: 10139396Abstract: A method of noninvasively detecting plant pathogenic virus and an electronic apparatus thereof are provided. The method is adapted to the electronic apparatus for detecting pathogenic virus in plants. The method includes the following steps. An excitation light beam is projected to the plant, and a reaction light emitted by the plant in response to the excitation light is received. An analytic optical spectrum corresponding to the reaction light is obtained, and whether the plant has the pathogenic virus or not is determined according to the analytic optical spectrum.Type: GrantFiled: April 12, 2016Date of Patent: November 27, 2018Assignee: NATIONAL TAIWAN NORMAL UNIVERSITYInventors: Jen-Jie Chieh, Yen-Hsiang Wang, Shien-Kuei Liaw, Wen-Chun Wei, Ming-Hsien Chiang
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Patent number: 9634769Abstract: A robust broadband ASE (amplified spontaneous emission) fiber light source device outputs a light beam which is little affected by temperature and radiation. The light source device is a single-pass backward or double-pass backward architecture, and has a coolerless pump laser and temperature compensated bandpass reflector. The light source device may have a high pass filtering element disposed between the wavelength division multiplexer thereof and the optical isolator thereof, so as to compensate the effect of the temperature to the mean wavelength of the light beam. The specific band of the temperature compensated bandpass reflector which reflects the light beam, and the band which the high pass filtering element transmits the light beam are within the band which the ASE unit amplifies the light beam, and the high pass filtering element mainly absorbs the light beam outside the specific band.Type: GrantFiled: December 24, 2014Date of Patent: April 25, 2017Assignee: NATIONAL APPLIED RESEARCH LABORATORIESInventors: Shien-Kuei Liaw, Ren-Young Liu, Hsiang Wang, Yen-Hung Lu
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Publication number: 20160298161Abstract: A method of noninvasively detecting plant pathogenic virus and an electronic apparatus thereof are provided. The method is adapted to the electronic apparatus for detecting pathogenic virus in plants. The method includes the following steps. An excitation light beam is projected to the plant, and a reaction light emitted by the plant in response to the excitation light is received. An analytic optical spectrum corresponding to the reaction light is obtained, and whether the plant has the pathogenic virus or not is determined according to the analytic optical spectrum.Type: ApplicationFiled: April 12, 2016Publication date: October 13, 2016Inventors: Jen-Jie Chieh, Yen-Hsiang Wang, Shien-Kuei Liaw, Wen-Chun Wei, Ming-Hsien Chiang
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Publication number: 20150188640Abstract: A robust broadband ASE (amplified spontaneous emission) fiber light source device outputs a light beam which is little affected by temperature and radiation. The light source device is a single-pass backward or double-pass backward architecture, and has a coolerless pump laser and temperature compensated bandpass reflector. The light source device may have a high pass filtering element disposed between the wavelength division multiplexer thereof and the optical isolator thereof, so as to compensate the effect of the temperature to the mean wavelength of the light beam. The specific band of the temperature compensated bandpass reflector which reflects the light beam, and the band which the high pass filtering element transmits the light beam are within the band which the ASE unit amplifies the light beam, and the high pass filtering element mainly absorbs the light beam outside the specific band.Type: ApplicationFiled: December 24, 2014Publication date: July 2, 2015Inventors: SHIEN-KUEI LIAW, REN-YOUNG LIU, HSIANG WANG, YEN-HUNG LU
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Publication number: 20130149197Abstract: A biotechnology detection device with optical fibers comprises a first optical fiber connected to a light source, and a prism having a first surface and a second surface. The first surface is connected to the first optical fiber and coated with an anti-reflective layer to be passed through by short-wavelength light; a second optical fiber connected to the second surface of the prism. The end of the second optical fiber is to be coated with test sample blended with a fluorescent agent, wherein the fluorescent agent emits long-wavelength light after being excited by short-wavelength light. The second prism surface is coated with a high reflective layer to reflect part of the long-wavelength light. A third optical fiber is connected to the second prism surface to convey part of the long-wavelength light. A detector is connected to the third optical fiber for detecting part of the long-wavelength light.Type: ApplicationFiled: June 12, 2012Publication date: June 13, 2013Applicant: National Taiwan University of Science and TechnologyInventors: Shien-Kuei Liaw, Chia-Ching Chang, Shin-Hua Tseng, Yi-Lin Yu, Shu-Chuan Lin, Hung-Wei Chen
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Patent number: 8311409Abstract: The present invention provides an optical signal-selection switch module which is used in a method for simultaneous real-time status monitoring and troubleshooting of a high-capacity single-fiber hybrid passive optical network that is based on wavelength-division-multiplexing techniques.Type: GrantFiled: November 18, 2009Date of Patent: November 13, 2012Assignee: National Taiwan University of Science and TechnologyInventors: Chu-Lin Chang, Gerd Keiser, Shien-Kuei Liaw, Yu-Sheng Huang
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Patent number: 8306417Abstract: The present invention provides a bidirectional optical signal traffic-directing and amplification module which is used in a method for simultaneous real-time status monitoring and troubleshooting of a high-capacity single-fiber hybrid passive optical network that is based on wavelength-division-multiplexing techniques.Type: GrantFiled: November 18, 2009Date of Patent: November 6, 2012Assignee: National Taiwan University of Science and TechnologyInventors: Chu-Lin Chang, Gerd Keiser, Shien-Kuei Liaw, Yu-Sheng Huang
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Publication number: 20120033688Abstract: The present invention provides a single frequency fiber laser apparatus. The fiber laser apparatus includes a Faraday rotator mirror. A piece of erbium doped fiber is inside the laser cavity. A wavelength selective coupler is connected to the erbium doped fiber. A pump source is coupled via the wavelength selective coupler. At least one sub-ring cavity component and/or an absorb component are inserted into the cavity for facilitating suppressing laser side modes to create a single longitudinal mode fiber laser. A partial reflectance fiber Bragg grating (FBG) is used as the front cavity end for this fiber laser.Type: ApplicationFiled: January 24, 2011Publication date: February 9, 2012Applicant: National Taiwan University of Science and TechnologyInventors: Shien-Kuei Liaw, Hsiang Wang, Kai-Hsiang Hsu, Fu-Chun Hung, Ching-Wen Hsiao
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Patent number: 8040925Abstract: A broadband fiber laser provides a lasing cavity including a reflective minor and at least one fiber Bragg grating for further providing a lasing signal to resonate and be amplified therein. Alternatively, the wavelength of the fiber laser can be either fixed or tunable by varying the central wavelength of the fiber Bragg grating and/or by adjusting the switching status of an optical switch pair.Type: GrantFiled: September 11, 2009Date of Patent: October 18, 2011Assignee: National Taiwan University of Science and TechnologyInventors: Shien-Kuei Liaw, Guo-Sing Jhong, Jian-An Chen
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Publication number: 20100316372Abstract: The present invention provides an optical signal-selection switch module which is used in a method for simultaneous real-time status monitoring and troubleshooting of a high-capacity single-fiber hybrid passive optical network that is based on wavelength-division-multiplexing techniques.Type: ApplicationFiled: November 18, 2009Publication date: December 16, 2010Inventors: Chu-Lin Chang, Gerd Keiser, Shien-Kuei Liaw, Yu-Sheng Huang
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Publication number: 20100316373Abstract: The present invention provides a bidirectional optical signal traffic-directing and amplification module which is used in a method for simultaneous real-time status monitoring and troubleshooting of a high-capacity single-fiber hybrid passive optical network that is based on wavelength-division-multiplexing techniques.Type: ApplicationFiled: November 18, 2009Publication date: December 16, 2010Inventors: Chu-Lin Chang, Gerd Keiser, Shien-Kuei Liaw, Yu-Sheng Huang
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Patent number: 7800744Abstract: A detection system that performs in a passive optical network is disclosed. The detection system uses a central office to provide detection signals to corresponding fiber branches for obtaining different reflected signals based on different optical network models. Hence, the central office can determine whether fiber branches in the passive optical network has a fault and where the fault is according to the reflected signals.Type: GrantFiled: September 10, 2007Date of Patent: September 21, 2010Assignee: National Taiwan University of Science & TechnologyInventors: Yin-Tse Lai, Shien-Kuei Liaw, Yi-Tseng Lin
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Publication number: 20100132931Abstract: The present invention discloses a thermal module for light source, which comprises a heat-conducting part and a heat-dissipating part engaged therewith. The heat-conducting part is provided with a heat-receiving portion to receive the heat generated by a light source, a joint portion to join with the heat-dissipating part. The heat-dissipating part is provided with a plurality of fin-shaped heat-dissipating sheets for heat dissipation and to join with the joint portion of the heat-conducting part.Type: ApplicationFiled: June 24, 2009Publication date: June 3, 2010Inventors: Shien-Kuei LIAW, Yu-Hsiu Lin, Jian-Li Huang
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Publication number: 20100008386Abstract: A broadband fiber laser provides a lasing cavity including a reflective minor and at least one fiber Bragg grating for further providing a lasing signal to resonate and be amplified therein. Alternatively, the wavelength of the fiber laser can be either fixed or tunable by varying the central wavelength of the fiber Bragg grating and/or by adjusting the switching status of an optical switch pair.Type: ApplicationFiled: September 11, 2009Publication date: January 14, 2010Inventors: Shien-Kuei Liaw, Guo-Sing Jhong, Jian-An Chen
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Patent number: 7616667Abstract: A broadband fiber laser provides a lasing cavity including a reflective mirror and at least one fiber Bragg grating for further providing a lasing signal to resonate and be amplified therein. Alternatively, the wavelength of the fiber laser can be either fixed or tunable by varying the central wavelength of the fiber Bragg grating and/or by adjusting the switching status of an optical switch pair.Type: GrantFiled: October 24, 2007Date of Patent: November 10, 2009Assignee: National Taiwan University of Science and TechnologyInventors: Shien-Kuei Liaw, Guo-Sing Jhong, Jian-An Chen
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Publication number: 20080267226Abstract: A broadband fiber laser provides a lasing cavity including a reflective mirror and at least one fiber Bragg grating for further providing a lasing signal to resonate and be amplified therein. Alternatively, the wavelength of the fiber laser can be either fixed or tunable by varying the central wavelength of the fiber Bragg grating and/or by adjusting the switching status of an optical switch pair.Type: ApplicationFiled: October 24, 2007Publication date: October 30, 2008Inventors: Shien-Kuei Liaw, Guo-Sing Jhong, Jian-An Chen
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Publication number: 20080062408Abstract: A detection system that performs in a passive optical network is disclosed. The detection system uses a central office to provide detection signals to corresponding fiber branches for obtaining different reflected signals based on different optical network models. Hence, the central office can determine whether fiber branches in the passive optical network has a fault and where the fault is according to the reflected signals.Type: ApplicationFiled: September 10, 2007Publication date: March 13, 2008Applicant: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Yin-Tse Lai, Shien-Kuei Liaw, Yi-Tseng Lin
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Patent number: 7031570Abstract: A device and a method of temperature compensating are disclosed. The device and method are employed for temperature compensation of a section of optical fiber. The device and method are useful for limiting any change in optical properties of the section of optical fiber or optical structures that can be corrected by changing the linear dimension accordingly. Such optical properties include the characteristic wavelengths of FBGs, Fabry-Perot cavities, and the like. The device includes a composite plate comprising plural fiber laminae, each of which has a designed orientation, and having a specific temperature-dependent characteristic in a direction for compensating an optical component positioned thereon having a temperature-dependent deformation, wherein said specific temperature-dependent characteristic is determined by said designed orientations of said plural fiber laminae.Type: GrantFiled: November 13, 2003Date of Patent: April 18, 2006Assignee: National Taiwan University of Science and TechnologyInventors: Chow-Shing Shin, Chiu-Hao Lin, Chia-Chin Chiang, Shien-Kuei Liaw, Yu-Chang Tseng, Hsuan-Chen Chen
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Publication number: 20040126062Abstract: A device and a method of temperature compensating are disclosed. The device and method are employed for temperature compensation of a section of optical fiber. The device and method are useful for limiting any change in optical properties of the section of optical fiber or optical structures that can be corrected by changing the linear dimension accordingly. Such optical properties include the characteristic wavelengths of FBGs, Fabry-Perot cavities, and the like. The device includes a composite plate comprising plural fiber laminae, each of which has a designed orientation, and having a specific temperature-dependent characteristic in a direction for compensating an optical component positioned thereon having a temperature-dependent deformation, wherein said specific temperature-dependent characteristic is determined by said designed orientations of said plural fiber laminae.Type: ApplicationFiled: November 13, 2003Publication date: July 1, 2004Applicant: National Taiwan UniversityInventors: Chow-Shing Shin, Chih-Hao Lin, Chia-Chin Chiang, Shien-Kuei Liaw, Yu-Chang Tseng, Hsuan-Chen Chen