公开(公告)号：US20210165300A1

公开(公告)日：2021-06-03

申请号：US17110599

申请日：2020-12-03

Applicant: California Institute of Technology

Inventor： Scott K. Cushing ,  Szilard Szoke ,  Manni He ,  Bryce P. Hickam

IPC: G02F1/39 ,  G01J3/42 ,  G01N21/64 ,  G01N21/31

Abstract: A coherent, entangled photon source which uses a continuous wave laser to replace pulsed photon excitation sources in multiphoton nonlinear processes. In various embodiments, the device comprises a continuous wave photon laser creating electromagnetic radiation at a specific frequency and narrow linewidth. The emitted beam may be conditioned by an optical fiber to allow for efficient interaction with a nonlinear crystal. The nonlinear material is designed and fabricated in a specific manner, enabling the quantum mechanical process of a single photon with well-defined energy being converted into two or more photons which display quantum correlations. The nonlinear material and subsequent fiber-optic or free space components control the temporal, spatial, and polarization-related quantum correlations such that the entangled photons can create a signal in multiphoton nonlinear processes that is the same or exceeds that of a pulsed photon source but at the average and peak powers of a continuous wave laser.

公开(公告)号：US20210156794A1

公开(公告)日：2021-05-27

申请号：US17103687

申请日：2020-11-24

Applicant: Korea Research Institute of Standards and Science

Inventor： Taek Jeong ,  Han Seb Moon ,  Dai Hyuk Yu ,  Jae Hoon Lee ,  Hyun Gue Hong

IPC: G01N21/31 ,  G01J3/42 ,  G01N21/64 ,  G01J3/12 ,  G01J3/44

Abstract: A method is disclosed for increasing an intensity of a signal detected in a spectroscopy device using a vapor cell and a spectroscopy device using the same. An operation method of the spectroscopy device may include: causing a first light for exciting an atom trapped in a vapor cell in a first hyperfine ground state to a first excited state to be incident on the vapor cell; causing a second light for exciting an atom trapped in the vapor cell in a second hyperfine ground state to a second excited state to be incident on the vapor cell; causing a third light for exciting the atom in the second excited state to a third excited state to be incident on the vapor cell; and detecting fluorescence which is emitted while the atom in the third excited state returns to the ground state.

公开(公告)号：US11014843B2

公开(公告)日：2021-05-25

申请号：US15937249

申请日：2018-03-27

Applicant: Roy Armstrong

Inventor： Roy Armstrong

IPC: G01S19/01 ,  G01J3/42 ,  G01J3/433 ,  C02F9/00 ,  G06F3/041 ,  H04W72/12

Abstract: A portable remote sensing system for real-time assessments of total suspended solids (TSS) in surface waters using above-water hyperspectral measurements. The system combines a miniature high signal-to-noise ratio spectrometer coupled to a credit card-size computer, lens, rechargeable battery, GPS, display panel, and dedicated software to derive TSS from above-water spectral measurements.

公开(公告)号：US20210140823A1

公开(公告)日：2021-05-13

申请号：US17137881

申请日：2020-12-30

Applicant: KOREA FOOD RESEARCH INSTITUTE

Inventor： Gyeong-Sik OK ,  Sung-Wook CHOI ,  Hyun-Joo CHANG

IPC: G01J3/42 ,  G01N21/3581 ,  G02B5/00 ,  G01V8/14 ,  G01V8/18 ,  G01V8/10

Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for generating a terahertz Bessel beam using the terahertz wave incident from the terahertz wave generating unit; a ring beam forming unit for forming a ring beam using the terahertz Bessel beam and concentrating the formed ring beam to an inspection target object; a scattered light detecting unit for detecting scattered light generated from the inspection target object; and a ring beam detecting unit for detecting a ring beam transmitted through the inspection target object.

公开(公告)号：US20210131958A1

公开(公告)日：2021-05-06

申请号：US17086814

申请日：2020-11-02

Applicant: INSTITUT NATIONAL DE LA RECHERCHE SCIENTIFIQUE

Inventor： Alessandro TOMASINO ,  Riccardo PICCOLI ,  Roberto MORANDOTTI ,  Luca RAZZARI ,  Yoann JESTIN

IPC: G01N21/3581 ,  G01J11/00 ,  G01J3/42 ,  G01J3/10

Abstract: A device, a system and a method for homodyne solid-state biased coherent detection of terahertz pulses in a range between 0.1 and 11 THz, the device comprising a metallic slit between, and parallel to, two longitudinal metallic electrodes, deposited on a surface of a substrate, and covered with a layer of nonlinear material, wherein a width of the metallic slit and a thickness of the nonlinear material layer are selected in relation to a central wavelength of the THz pulses. The method comprises focusing a THz beam and a pulsed laser beam of pulse energies in a range between 10 and 100 nJ onto the metallic slit, the metallic electrodes being biased by a static DC voltage bias selected in a range between 20 VPP and 200 VPP; and retrieving a terahertz pulse waveform using the terahertz pulse repetition rate as synchronism.

公开(公告)号：US20210131957A1

公开(公告)日：2021-05-06

申请号：US16638638

申请日：2017-08-22

Applicant: Hitachi High-Technologies Corporation

Inventor： Mizuki MOHARA ,  Kei SHIMURA ,  Kenji AIKO

IPC: G01N21/3581 ,  G01J3/10 ,  G01J3/02 ,  G01J3/42

Abstract: In an is-TPG method in which lasers having two different wavelengths are used to generate a wavelength-variable far-infrared light, a far-infrared light (TPG light) having an unstable output at a broad wavelength is also slightly generated at the same time with only one laser light. The generated is-TPG and the TPG light are converted, after passing through a specimen, to near-infrared light inside a nonlinear optical crystal for detection and are observed by a detector. The signal light output of the is-TPG light becomes unstable due to the TPG light. According to the present invention, the TPG light is removed by means of a slit and the like (filter) immediately before the specimen and is not introduced into the nonlinear optical crystal for detection. At this time, by using a change in the emission direction when the frequency of the is TPG light is changed, the filter is moved in accordance with the frequency so that only the is-TPG light passes therethrough.

公开(公告)号：US10989594B2

公开(公告)日：2021-04-27

申请号：US16658701

申请日：2019-10-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Weonkyu Koh ,  Junghyun Park

IPC: G01J3/28 ,  G01J3/02 ,  G02B5/28 ,  H01L21/8258 ,  H01L21/02 ,  G01J3/42 ,  G01J3/12

Abstract: An optical spectrometer may include an optical filter including a plurality of filter layers formed on a base substrate. The filter layers may include a perovskite material and at least two filter layers among the plurality of filter layers may include perovskite materials having different composition ratios from each other. The filter layers may show respective band-gap characteristics in different optical wavelength ranges from each other, in an optical absorption spectrum and/or an optical transmission spectrum.

公开(公告)号：US10983045B2

公开(公告)日：2021-04-20

申请号：US16340550

申请日：2017-10-11

Applicant: VICTORIA LINK LIMITED

Inventor： Brendan Liam Darby ,  Eric Le Ru ,  Matthias Meyer

IPC: G01J3/02 ,  G01J3/08 ,  G01N21/25 ,  G01J3/42 ,  G01J3/44 ,  G01N21/03

Abstract: A spectrometer apparatus for measuring spectra of a liquid sample, such as a beverage like wine. The apparatus has an integrating cavity with a reflective inner wall to receive a cuvette containing the liquid sample within the integrating cavity. A combination of light inlet ports and light outlet ports are provided to receive light from at least one light source and deliver light to a spectrometer. A light path adjuster is configured to selectively adjust a light path through the integrating cavity so at least two distinct light paths are provided wherein when the light path adjuster is in a first configuration, the apparatus is in transmission mode in which light from the light source follows a first light path; when the light path adjuster is in a second configuration, the apparatus is in a diffusely reflecting mode in which light from the light source follows a second light path.

公开(公告)号：US20210108961A1

公开(公告)日：2021-04-15

申请号：US17247789

申请日：2020-12-23

Applicant: VIAVI Solutions Inc.

Inventor： William D. HOUCK ,  Valton SMITH

IPC: G01J3/02 ,  G01S17/08 ,  G01J3/42

Abstract: A device may determine a time-of-flight measurement by performing a sample of a sensor based on light received via at least one first spectral filter, wherein the at least one first spectral filter is associated with a spectral range for a time-of-flight measurement; determine that a condition is satisfied with regard to the time-of-flight measurement, wherein the condition relates to an orientation or a position of the sensor or the sensor device relative to a measurement target; trigger a spectrometry measurement to be performed based on determining that the condition is satisfied with regard to the time-of-flight measurement; and perform, based on light received via at least one second spectral filter and by performing a sample of the sensor, the spectrometry measurement for the measurement target based on the condition being satisfied with regard to the time-of-flight measurement.

公开(公告)号：US10969335B2

公开(公告)日：2021-04-06

申请号：US16095771

申请日：2017-04-28

Applicant: Tokyo Institute of Technology

Inventor： Yukio Kawano ,  Daichi Suzuki

IPC: G01J3/42 ,  G01J5/04 ,  G01N21/35 ,  H01L51/00 ,  G01N21/3586

Abstract: A terahertz wave detection device includes a low-dimensional electron system material formed on a substrate; and a first electrode and a second electrode opposingly arranged on a two-dimensional plane of the low-dimensional electron system material. The first electrode and the second electrode are made of metals having different thermal conductivity. An 8-element array sensor includes eight terahertz wave detection devices aligned in an array. The terahertz wave detection device includes carbon nanotube film; a first electrode disposed on one side of the carbon nanotube film; and a second electrode disposed on the other side of the carbon nanotube film. The first electrode and the second electrode have different thermal conductivity.