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公开(公告)号：US20200278289A1
公开(公告)日：2020-09-03
申请号：US16649448
申请日：2018-10-08
Applicant: Agency for Science, Technology and Research
Inventor： Hong Cai , Jifang Tao , Lennon Yao Ting Lee , Alex Yuandong Gu
IPC: G01N21/3504 , G01N21/77
Abstract: Various embodiments may relate a chemical sensor. The chemical sensor may include a substrate including a first sealed (or isolated) cavity and a second sealed (or isolated) cavity separate from the first sealed (or isolated) cavity. The chemical sensor may also include an emitter in the first sealed (or isolated) cavity, the emitter configured to emit infrared light. The chemical sensor may further include a detector in the second sealed (or isolated) cavity. The chemical sensor may also include a waveguide configured to carry the infrared light from the emitter to the detector. The waveguide may include a sensing portion configured such that a property of the infrared light carried through the sensing portion changes in response to a chemical entity in contact with the sensing portion. The detector may be configured to detect the change in the property (of the infrared light).
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公开(公告)号：US10578438B2
公开(公告)日：2020-03-03
申请号：US16076563
申请日：2017-01-24
Applicant: Agency for Science, Technology and Research
Inventor： Guoqiang Wu , Jifang Tao , Alex Yuandong Gu , Junfeng Song
Abstract: Various embodiments may provide an optical gyroscope. The optical gyroscope may include a ring resonator, an input source configured to generate or provide a first light beam and a second light beam to the ring resonator, and a switching pathway having an input end and an output end coupled to the ring resonator, and may include a plurality of switches. The optical gyroscope may include a control circuit configured to control the plurality of switches to allow the first light beam to propagate from the input end to the output end along the switching pathway during a first time interval, and allow the second light beam to propagate from the input end to the output end along the switching pathway during a second time interval. The optical gyroscope may additionally include a detector loop configured to receive the first light beam and the second light beam from the ring resonator.
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公开(公告)号：US09823150B2
公开(公告)日：2017-11-21
申请号：US15036792
申请日：2014-11-14
Inventor： Hong Cai , Jifang Tao , Julius Ming-Lin Tsai , Aiqun Liu
CPC classification number: G01L11/025 , G01L9/0076
Abstract: A micro-machined optical pressure sensor, comprising: a diaphragm configured to deform when a force is applied thereto; and a sensing micro-ring spaced apart from the diaphragm by a gap, the gap being variable depending on the force applied on the diaphragm, wherein the sensing micro-ring is configured to produce a resonance wavelength shift when the gap is varied, the resonance wavelength shift indicative of the force applied to the diaphragm.
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公开(公告)号：US10215692B2
公开(公告)日：2019-02-26
申请号：US15519011
申请日：2015-10-16
Applicant: Agency for Science, Technology and Research
Inventor： Jifang Tao , Hong Cai , Alex Yuandong Gu , Hyun Kee Chang
IPC: G02B6/00 , G02B6/10 , G01N21/3504 , G02B6/12
Abstract: There is provided an optical waveguide structure, including a substrate, an insulating layer disposed on the substrate whereby the insulating layer includes an air slot formed therein, a first material layer suspended over the air slot whereby the first material layer constitutes a waveguide core of the optical waveguide structure, and a second material layer disposed over the waveguide core whereby the waveguide core is suspended over the air slot by the second material layer. There is also provided an optical gas sensor incorporating the optical waveguide structure and methods of fabrication thereof.
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公开(公告)号：US10151638B2
公开(公告)日：2018-12-11
申请号：US15761082
申请日：2016-08-12
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Jifang Tao , Hong Cai , Yuandong Alex Gu , Guoqiang Wu
Abstract: Various aspects of this disclosure provide a bolometer including a substrate and a ring resonator structure over the substrate. The bolometer may also include a silicon oxide layer in thermal contact with the ring resonator structure. The bolometer may further include a first waveguide over the substrate and coupled to the ring resonator structure, the first waveguide configured to couple an infrared light to the ring resonator structure so that the infrared light generates a temperature increase in the silicon oxide layer. The bolometer may additionally include a second waveguide over the substrate and coupled to the ring resonator structure, the second waveguide configured to couple a probe light input to the ring resonator structure so that a probe light output is generated from the probe light input, the probe light output having a change in a characteristic from the probe light input based on the temperature increase.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20170227456A1
公开(公告)日：2017-08-10
申请号：US15519011
申请日：2015-10-16
Applicant: Agency for Science, Technology and Research
Inventor： Jifang Tao , Hong Cai , Alex Yuandong Gu , Hyun Kee Chang
IPC: G01N21/3504 , G02B6/10
CPC classification number: G01N21/3504 , G02B6/00 , G02B6/10 , G02B2006/12097 , G02B2006/12138 , G02B2006/12176
Abstract: There is provided an optical waveguide structure, including a substrate, an insulating layer disposed on the substrate whereby the insulating layer includes an air slot formed therein, a first material layer suspended over the air slot whereby the first material layer constitutes a waveguide core of the optical waveguide structure, and a second material layer disposed over the waveguide core whereby the waveguide core is suspended over the air slot by the second material layer. There is also provided an optical gas sensor incorporating the optical waveguide structure and methods of fabrication thereof.
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公开(公告)号：US11486820B2
公开(公告)日：2022-11-01
申请号：US16649448
申请日：2018-10-08
Applicant: Agency for Science, Technology and Research
Inventor： Hong Cai , Jifang Tao , Lennon Yao Ting Lee , Alex Yuandong Gu
IPC: G01N21/35 , G01N21/77 , G01N21/3504
Abstract: Various embodiments may relate a chemical sensor. The chemical sensor may include a substrate including a first sealed (or isolated) cavity and a second sealed (or isolated) cavity separate from the first sealed (or isolated) cavity. The chemical sensor may also include an emitter in the first sealed (or isolated) cavity, the emitter configured to emit infrared light. The chemical sensor may further include a detector in the second sealed (or isolated) cavity. The chemical sensor may also include a waveguide configured to carry the infrared light from the emitter to the detector. The waveguide may include a sensing portion configured such that a property of the infrared light carried through the sensing portion changes in response to a chemical entity in contact with the sensing portion. The detector may be configured to detect the change in the property (of the infrared light).
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公开(公告)号：US20210255100A1
公开(公告)日：2021-08-19
申请号：US16967641
申请日：2019-02-08
Inventor： Jifang Tao , Chia-Hung Chen , Yingying Qiao , Weikang Nicholas Lin , Alex Yuandong Gu
Abstract: A sensor module for detecting particulate matter of an aerosol, which may include a source of electromagnetic radiation and a collector for electromagnetic radiation. The collector may include a cavity and a first opening for the aerosol. The cavity may be reflective for the electromagnetic radiation. The first opening may allow exchange of the aerosol in and out of the cavity. The source of electromagnetic radiation may be arranged to project the electromagnetic radiation onto the aerosol which may be scattered as scattered electromagnetic radiation. The sensor module may include a detector of electromagnetic radiation arranged to detect the scattered electromagnetic radiation that is reflected by the collector. The source and the detector may be arranged on a same side of the collector. The source and the detector may be arranged at a same aperture of the collector.
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公开(公告)号：US20200173780A1
公开(公告)日：2020-06-04
申请号：US16638082
申请日：2018-08-16
Applicant: Agency for Science, Technology and Research
Inventor： Guoqiang Wu , Jifang Tao , Alex Yuandong Gu , Geng Li Chua
IPC: G01C19/5698
Abstract: Various embodiments may provide a gyroscope. The gyroscope may include a piezoelectric substrate, an excitation transducer configured to generate a surface acoustic wave, and a sensing transducer configured to receive the surface acoustic wave generated by the excitation transducer. The gyroscope may additionally include a mass dot array between the excitation transducer and the sensing transducer, the mass dot array configured to generate a stress on the piezoelectric substrate based on a rotation of said gyroscope upon the surface acoustic wave passing through the mass dot array. The gyroscope may also include a light source, and an optical detector configured to receive one or more light beams generated by the light source to determine the rotation of the gyroscope based on a property of the one or more light beams. The property of the one or more light beams may be variable based on the stress on the piezoelectric substrate.
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公开(公告)号：US10408775B2
公开(公告)日：2019-09-10
申请号：US15576840
申请日：2016-05-25
Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
Inventor： Jifang Tao , Alex Yuan-dong Gu , Hong Cai , Junfeng Song
Abstract: According to various embodiments, there is provided a sensor arrangement including a filter configured to provide an output signal having an output wavelength, the output wavelength having a dependence on a temperature of the filter; a temperature module configured to change the temperature of the filter; a controller circuit configured to control the temperature module for changing the temperature of the filter until the output wavelength increases with decreasing temperature; and a determination circuit configured to determine a dew point of an environment surrounding the sensor arrangement, based on a minimum value of the output wavelength and the dependence.
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