公开(公告)号：US11353827B1

公开(公告)日：2022-06-07

申请号：US17127616

申请日：2020-12-18

Applicant: The Regents of the University of Colorado, a body corporate ,  Government of the United States of America as represented by the Secretary of Commerce

Inventor： Jun Ye ,  Eric G. Oelker ,  William R. Milner ,  John M. Robinson ,  Colin J. Kennedy ,  Tobias Bothwell ,  Dhruv Kedar ,  Terry Brown

IPC: G04F5/14 ,  H03L7/26 ,  G01J3/10 ,  G01J3/00 ,  H01L27/15 ,  G01J3/45 ,  H04B10/516

Abstract: The frequency stability of an optical local oscillator is improved by locking a laser to a silicon Fabry-Perot cavity operating at a temperature near 124 K, where the coefficient of thermal expansion of silicon is near zero. The cavity is mounted inside a cryostat housed in a temperature-stabilized vacuum system that is surrounded by an isolating enclosure and supported by an active vibration platform. Laser light is steered with a superpolished mirror toward a superpolished focusing optic that couples the laser light into the cavity. Light reflected from the cavity is used to stabilize the laser via the Pound-Drever-Hall technique, while light transmitted through the cavity is used to stabilize the laser power. A resonant transimpedance amplifier allows the laser power to be reduced, which reduces heating of the cavity caused by residual absorption of the light.

公开(公告)号：US20220155730A1

公开(公告)日：2022-05-19

申请号：US17127616

申请日：2020-12-18

Applicant: The Regents of the University of Colorado, a body corporate ,  Government of the United States of America as represented by the Secretary of Commerce

Inventor： Jun Ye ,  Eric G. Oelker ,  William R. Milner ,  John M. Robinson ,  Colin J. Kennedy ,  Tobias Bothwell ,  Dhruv Kedar ,  Terry Brown

IPC: G04F5/14 ,  H03L7/26

Abstract: The frequency stability of an optical local oscillator is improved by locking a laser to a silicon Fabry-Perot cavity operating at a temperature near 124 K, where the coefficient of thermal expansion of silicon is near zero. The cavity is mounted inside a cryostat housed in a temperature-stabilized vacuum system that is surrounded by an isolating enclosure and supported by an active vibration platform. Laser light is steered with a superpolished mirror toward a superpolished focusing optic that couples the laser light into the cavity. Light reflected from the cavity is used to stabilize the laser via the Pound-Drever-Hall technique, while light transmitted through the cavity is used to stabilize the laser power. A resonant transimpedance amplifier allows the laser power to be reduced, which reduces heating of the cavity caused by residual absorption of the light.

公开(公告)号：US20220083755A1

公开(公告)日：2022-03-17

申请号：US17476020

申请日：2021-09-15

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Kartik Arvind Srinivasan ,  Edgar F. Perez

IPC: G06K7/14 ,  G06K7/10

Abstract: A barcoded end facet printed photonic chip includes: an optically transparent direct laser writing substrate including a transverse waveguide writing surface to receive a direct write laser light for off-axis direct write laser printing and a facet surface to receive the direct write laser light for on-axis direct write laser printing of a barcode-guided direct laser written optical coupling on the facet surface; a waveguide disposed in the optically transparent direct laser writing substrate and in optical communication with the facet surface; and an optically visible bulk impregnated barcode disposed in the optically transparent direct laser writing substrate arranged proximate to the waveguide and in optical communication with the facet surface.

公开(公告)号：US11272375B2

公开(公告)日：2022-03-08

申请号：US16841106

申请日：2020-04-06

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Anirudha Sahoo ,  Timothy Alan Hall ,  Robert Charles Hagwood

IPC: H04W16/14 ,  H04W16/10 ,  H04W24/02 ,  H04W28/16 ,  H04L5/00 ,  H04W72/04

Abstract: A dynamic physical resource block control apparatus dynamically controls allocation of a physical resource block and includes: a dynamic spectrum arbitrage controller in communication with LTE wireless channels and a secondary user, the dynamic spectrum arbitrage controller: produces a status request to the LTE wireless channels, receives channel status response from the LTE wireless channels in response to the channel status request; receives a PRB allocation request from the secondary user; and produces a PRB map in response to the PRB allocation request; and LTE wireless channels in communication with a primary user and the secondary user and that: communicates a PRB map to the primary user; receives primary user data from the primary user; receives secondary user data from the secondary user.

公开(公告)号：US20220035225A1

公开(公告)日：2022-02-03

申请号：US17490841

申请日：2021-09-30

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Vladimir Anatolyevich Aksyuk ,  Christian Haffner ,  Henri J. Lezec ,  Andreas Joerg ,  Mikael Mazur ,  Daniel Chelladurai ,  Jueg Leuthold

IPC: G02F1/295

Abstract: Disclosed is an optoelectromechanical switch that includes: an optical feedline disposed on an isolation substrate that receives resonator light that is subject to optical communication to a resonator when a cavity length of the resonator supports an electromagnetic mode at the wavelength of the resonator light; a resonator including: a low refractive index optical layer and receives substrate electrical counter potential; a non-conductive spacer; the electrically conductive membrane and that receives a membrane electrical potential and deflects toward and away from the electrically conductive high-index optical waveguide based on a difference in potential between the membrane electrical potential and the substrate electrical counter potential; the cavity length that is variable and under electromechanical control.

公开(公告)号：US11204288B2

公开(公告)日：2021-12-21

申请号：US16567765

申请日：2019-09-11

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Weston Leo Tew, Jr. ,  Jay Robert Nanninga

IPC: G01K1/08 ,  G01K13/00 ,  G01K11/06 ,  G01K1/02 ,  G01N25/12

Abstract: A triple point immersion cell article determines a triple point of a non-metallic analyte and includes: a first cryochamber including a first cryo-zone; a second cryochamber including a second cryo-zone that is: nested and disposed in the first cryochamber; and thermally isolated by the first cryochamber; a third cryochamber including a third cryo-zone, the third cryochamber being: nested and disposed in the second cryochamber; thermally isolated from the exterior environment by the first cryochamber and the second cryochamber; and thermally isolated from the first cryochamber by the second cryochamber; and a fourth cryochamber including a fourth cryo-zone disposed in the third cryochamber; a triple-point pressure vessel disposed in the fourth cryochamber; and a thermowell disposed in the triple-point pressure vessel.

公开(公告)号：US20210381883A1

公开(公告)日：2021-12-09

申请号：US17336964

申请日：2021-06-02

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Michael Gaitan ,  Jon Clement Geist ,  Benjamin James Reschovsky ,  Akobuije Douglas Eziani Chijioke

IPC: G01H9/00

Abstract: A calibration apparatus for calibrating a laser Doppler vibrometer includes: a frequency shifter stage that: receives, from the laser Doppler vibrometer, primary laser light; produces frequency shifted light; communicates the frequency shifted light to a reflector; receives frequency shifted light reflected by the reflector; produces secondary light; and communicates the secondary light to the laser Doppler vibrometer, such that the laser Doppler vibrometer receives the secondary light from the frequency shifter stage and produces a synthetic velocity shift from the secondary light; and the reflector that receives and reflects the frequency shifted light back to the frequency shifter stage.

公开(公告)号：US11193914B2

公开(公告)日：2021-12-07

申请号：US16774646

申请日：2020-01-28

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Jeeseong Hwang ,  Christopher Yung ,  Kimberly Ann Briggman ,  John Henry Lehman

IPC: G01N29/22 ,  C01B32/158 ,  G01N29/24

Abstract: A photoacoustic photon meter includes: a photoacoustic generative array including carbon nanotubes disposed in a photoacoustic generating pattern, such that the carbon nanotubes: receive photons comprising optical energy, and produce thermal energy from the optical energy; and a superstratum including a thermally expandable elastomer on which the photoacoustic generative array is fixedly disposed in position on the superstratum to spatially conserve the photoacoustic generating pattern, and such that the superstratum: is optically transparent to the photons; receives the thermal energy from the photoacoustic generative array; expands and contracts in response to receipt of the thermal energy; and produces photoacoustic pressure waves in response to the expansion and contraction, the photoacoustic pressure waves including a photoacoustic intensity and photoacoustic frequency that are based upon an amount of optical pressure applied to the carbon nanotubes by the photons, a spatial photon fluence of the photons, or a spectral photon fluence of photons.

公开(公告)号：US11175826B2

公开(公告)日：2021-11-16

申请号：US16861309

申请日：2020-04-29

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： David Richard Kuhn

IPC: G06F3/06 ,  G06F21/62

Abstract: Provided is a process including: initializing a data block matrix; making supra-diagonal nodes that include at most one more node than sub-diagonal nodes; making a hash nodes with a hash sequence length that is proportional to a number of nodes in the row or column of nodes in which the hash node is arranged; and writing data blocks in nodes of the data block matrix such that a number of data blocks in nodes in the data block matrix is less than (N2−N) for N number of nodes in the data block matrix, wherein the data block matrix has dispersed data blocks.

公开(公告)号：US11175224B2

公开(公告)日：2021-11-16

申请号：US16938300

申请日：2020-07-24

Applicant: Government of the United States of America, as represented by the Secretary of Commerce

Inventor： Kevin O'Connell Douglass ,  Stephen Paul Eckel ,  Jacob Edmond Ricker ,  Jay Howard Hendricks

IPC: G01N21/41 ,  G01B9/02

Abstract: An optical refraction barometer measures pressure based on refractivity changes and includes: an optical light source; an optical frequency controller; a first optical phase controller; a first polarization controller; an electronic reference arm in optical communication with the first polarization controller; a second optical phase controller in optical communication with the optical frequency controller; a second polarization controller in optical communication with the second optical phase controller; an electronic sample arm in optical communication with the second polarization controller and in electrical communication with the second optical phase controller; a second sideband frequency generator; a mixer in electrical communication with the detector and the second sideband frequency generator; and a first sideband frequency generator in electrical communication with the mixer; and a dual fixed length optical cavity refractometer.