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公开(公告)号：US12015384B2
公开(公告)日：2024-06-18
申请号：US16997951
申请日：2020-08-20
Applicant: Artilux, Inc.
Inventor： Yun-Chung Na , Yen-Cheng Lu
IPC: H03F3/08 , G01J1/44 , H01L31/107 , H01L31/18
CPC classification number: H03F3/085 , G01J1/44 , H01L31/107 , H01L31/1808 , H03F3/087 , G01J2001/4466
Abstract: A photo-current amplification apparatus is provided. The photo-current amplification apparatus includes a photo-detecting device including: a substrate; an absorption region comprising germanium, the absorption region supported by the substrate and configured to receive an optical signal and to generate a first electrical signal based on the optical signal; an emitter contact region of a conductivity type; and a collector contact region of the conductivity type, wherein at least one of the emitter contact region or the collector contact region is formed outside the absorption region, and wherein a second electrical signal collected by the collector contact region is greater than the first electrical signal generated by the absorption region.
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公开(公告)号：US12012137B2
公开(公告)日：2024-06-18
申请号：US17018383
申请日：2020-09-11
Applicant: Railway Equipment Company, Inc.
Inventor： David K. Fox , Randall G. Honeck
CPC classification number: B61L29/30 , G01J1/44 , B61L29/18 , B61L2205/00 , B61L2207/00 , G08C17/02
Abstract: A railroad crossing light detector system is disclosed. The system includes determining a first signal indicative of the amount of light emitted from an illuminated railroad crossing light source and determining a second signal indicative of the orientation of the crossing light. The first and second signals are transmitted to a signal determination module that compares the first and second signals to predetermined stored values. The compared signals are then provided to a railroad crossing controller for relaying to a central/remote monitoring location. In the event that at least one of the signals is out of range relative to the stored value, then an inspection request signal together with information on the location of the crossing light is provided to the central monitoring location. In this manner, the number of in-person inspections to the crossing light may be significantly reduced.
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公开(公告)号：US20240192052A1
公开(公告)日：2024-06-13
申请号：US18286909
申请日：2022-05-13
Inventor： Anton VETLUGIN , Cesare SOCI , Nikolay Ivanovich ZHELUDEV
CPC classification number: G01J1/44 , G01J1/0425 , G01J1/4228 , G01J2001/442
Abstract: According to embodiments of the present invention, a method of detecting photons is provided. The method includes arranging a plurality of light absorbing elements to interact with an electromagnetic standing wave at a corresponding plurality of points of the electromagnetic standing wave to absorb at least part of the electromagnetic standing wave, the plurality of light absorbing elements being spaced apart from each other, and detecting electrical signals generated in response to the absorption to detect photons corresponding to the electromagnetic standing wave. According to further embodiments of the present invention, a photon detector arrangement is also provided.
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公开(公告)号：US20240183957A1
公开(公告)日：2024-06-06
申请号：US18076119
申请日：2022-12-06
Applicant: VELODYNE LIDAR USA, INC.
Inventor： Suresh Rangarajan , Oren Milgrome
CPC classification number: G01S7/497 , G01J1/44 , G01J2001/446 , G01S2007/4975
Abstract: The subject matter of this disclosure relates to a system, a method, and an apparatus for power monitoring and blockage detection in a lidar device. An example method includes: emitting, by a transmitter of a lidar device, an optical signal toward a maintenance area that is inside the lidar device and outside a field of view for the lidar device; measuring, by a power monitoring circuit of the lidar device, an intensity of an incident signal corresponding to the optical signal; comparing the measured intensity with a target intensity value; and adjusting, based on the comparison, an electrical control signal provided to the transmitter.
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公开(公告)号：US20240183709A1
公开(公告)日：2024-06-06
申请号：US18287829
申请日：2022-04-20
Inventor： Shu-Wei HUANG , Bowen LI
CPC classification number: G01J1/44 , G01J3/1895 , G01J3/2803 , G01J2001/442
Abstract: A time-to-frequency converter transforms an initial single-photon pulse into a transformed pulse such that the temporal waveform of the initial pulse is mapped to the spectrum of the transformed pulse. The time-to-frequency converter includes a dispersive optical element followed by a time lens. The spectrum of the transformed pulse is then measured to determine the arrival time of the initial pulse. The spectrum can be measured using a photon-counting spectrometer that spatially disperses the transformed pulse onto an single-photon detector array. Alternatively. an additional dispersive element can be used with the time-to-frequency converter to implement a time magnifier. The arrival time of the resulting time-magnified pulse can then be measured using time-correlated single-photon counting. This arrival time can then be divided by the magnification factor of the time magnifier to obtain the arrival time of the initial pulsc.
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Patent Agency Ranking
公开(公告)号：US11994428B1
公开(公告)日：2024-05-28
申请号：US18110851
申请日：2023-02-16
Applicant: PsiQuantum Corp.
Inventor： Faraz Najafi
CPC classification number: G01J1/44 , G01J1/0407 , H03K17/941 , G01J2001/442 , G01J2001/4446
Abstract: A photon detecting component is provided. The photon detecting component includes a first waveguide and a detecting section. The detecting section includes a second waveguide; a detector, optically coupled with the second waveguide, configured to detect one or more photons in the second waveguide; an optical switch configured to provide an optical coupling between the first waveguide and the second waveguide when the detector is operational; and an electrical switch electrically coupled to the detector, wherein the electrical switch is configured to change state in response to the detector detecting one or more photons. The photon detecting component further includes readout circuitry configured to determine a state of the electrical switch of the detecting section.
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公开(公告)号：US11988553B2
公开(公告)日：2024-05-21
申请号：US17949145
申请日：2022-09-20
Applicant: Advanced Semiconductor Engineering, Inc.
Inventor： Kuo Sin Huang , Tien-Chia Liu , Ko-Fan Tsai , Cheng-Te Chou , Yan-Te Chou
CPC classification number: G01J1/44 , G01J2001/4247 , G01J2001/444
Abstract: An optical module is disclosed. The optical module includes a carrier, an optical emitter disposed over the carrier, and a monitor disposed over the carrier and configured to adjust a property of a first light emitted from the optical emitter.
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公开(公告)号：US20240163576A1
公开(公告)日：2024-05-16
申请号：US18056093
申请日：2022-11-16
Applicant: BAE Systems Imaging Solutions Inc.
Inventor： Xianmin Yi , Chien-Horn Lu , Shanli Hu , Edmond Tam , Angel Rogelio Lopez , William Tian
IPC: H04N5/355 , G01J1/44 , H04N5/357 , H04N5/3745
CPC classification number: H04N5/355 , G01J1/44 , H04N5/3577 , H04N5/3745 , G01J2001/4466
Abstract: Techniques to provide a low-power single-photon avalanche diode (SPAD) image. An example imaging device includes a SPAD array having a plurality of pixels configured to detect electromagnetic radiation, and a processing device configured to deactivate, based on an event count, a pixel of the SPAD array for a remaining duration of a first detection frame of the SPAD array. The pixel can remain deactivated for the remaining duration, and the remaining duration can span from a deactivation time until an end of the first SPAD frame. The processing device can be further configured to reactivate the pixel in a subsequent detection frame of the SPAD array.
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公开(公告)号：US11984934B2
公开(公告)日：2024-05-14
申请号：US17228719
申请日：2021-04-13
Applicant: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY
Inventor： Xiaogang Qiang , Junjie Wu , Yizhi Wang
CPC classification number: H04B10/70 , G01J1/44 , G02F1/212 , G06N10/00 , G01J2001/442
Abstract: The present invention discloses an integrated photonic chip structure for universal quantum walk simulation which combines the multiphoton source that can generate the spatially entangled multi-photon state and the linear optical network that can implement the unitary transformation, and establishes mapping between on-chip spatial-entangled multi-photon state and quantum walk state and mapping between on-chip linear optical unitary transformation and the evolution process of multi-particle quantum walk. By manipulating the spatially entangled multi-photon state generated via the multi-photon sources and the optical unitary transformation implemented via the universal linear optical networks, the chip structure can implement universal quantum walk simulation with the control over all parameters of multiple-particle quantum walks including such as evolution Hamiltonian, evolution time, initial evolution state and particle properties (i.e., particle indistinguishability and particle exchange symmetry).
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公开(公告)号：US20240151580A1
公开(公告)日：2024-05-09
申请号：US17981497
申请日：2022-11-07
Applicant: Japan Display Inc.
Inventor： Chungkai CHEN , Naoki TAKADA
IPC: G01J1/44
CPC classification number: G01J1/44
Abstract: A light sensing apparatus includes a pixel array including Thin Film Transistors (TFTs) and an interface integrated circuit including silicon transistors. The pixel array includes a plurality of pixel circuits. Each of the plurality of pixel circuits includes a light sensitive device and a detection TFT connected to the light sensitive device. The pixel array may also include a plurality of correlated double sampling (CDS) circuits each including a current source configured to provide current that biases a detection TFT in one of the pixel circuits to be configured as a source-follower. The interface integrated circuit includes at least one receiver circuit configured to receive an output of at least one of the CDS circuits. The CDS circuits may also include a bypass TFT, and the interface integrated circuit may also include a current source that provides current that biases a detection TFT in one of the pixel circuits to be configured as a source-follower when the bypass TFT is active.
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