Aosense, Inc.

Augmented Radar Imaging, Inc.

Finisar Corporation

Todd Gustavson

Victor Shtrom

Adam T Black

Darin Milton

Janine Cheng

Ramesh Sundaram

Brenton C Young

Paul Kessler Rosenberg

Andreas G Weber

Mark A Kasevich

Martin Wisecarver

Subra Nagarajan

Miroslav Y Shverdin

Thomas H Loftus

Michael R Matthews

Konstantinos G Haritos

Igor Teper

Leo W Hollberg

Artyom Vitouchkine

Brent C Young

Dean Haritos

During a measurement technique, an electronic device may receive first sensor information associated with a first field of view and a first timestamp, and second sensor information associated with a second field of view and a second timestamp. For example, the electronic device may perform a first measurement using a first sensor and performing a second, different type of measurement using a second sensor. Therefore, the first sensor information and the second sensor information may be associated with different types of sensors. Moreover, the first timestamp and the second timestamp may be concurrent or in close temporal proximity, and the first field of view and the second field of view may at least substantially overlap. Then, the electronic device may store the first sensor information and the second sensor information in memory. In some embodiments, the electronic device stores the first timestamp and the second timestamp in the memory.

Dual-measurement data structure for autonomous vehicles

A circuit board in an electronic device includes a first set of transmit antennas and a first set of receive antennas arranged along an azimuth direction, and a second set of transmit antennas and a second set of receive antennas arranged along a direction that includes components in the azimuth direction and an elevation direction. Moreover, separations between adjacent transmit antennas in the first or second set of transmit antennas along the azimuth direction may be greater than one half of the fundamental wavelength. Furthermore, separations between adjacent receive antennas in the first or second set of receive antennas along the azimuth direction may equal one half of the fundamental wavelength. Additionally, adjacent antennas in the second set of transmit antennas and the second set of receive antennas may be partially offset from each other and partially overlap with each other along the elevation direction.

Virtual radar array having reduced size

During a location technique, a sensor module in a vehicle, which has non-retractable wheels in contact with a driving surface, determines a location of the vehicle. In particular, the sensor module is positioned on or in a direction of a side-facing surface of the vehicle. Moreover, during operation, the sensor module may transmit radar signals approximately perpendicular to a direction of motion of the vehicle. Then, the sensor module may receive reflected radar signals. Furthermore, the sensor module may analyze a time sequence of the reflected radar signals. Next, the sensor module may determine the location of the vehicle based at least in part on the analyzed time sequence of reflected radar signals.

Vehicle location determination using synthetic aperture radar

A system for gravity measurement includes one or more atom sources, two or more laser beams, and a polarizing beamsplitter and a retro-reflection prism assembly. The one or more atom sources is to provide three ensembles of atoms. The two or more laser beams is to cool or interrogate the three ensembles of atoms. The polarizing beamsplitter and the retro-reflection prism assembly are in a racetrack configuration. The racetrack configuration routes the two or more laser beams in opposing directions around a loop topology, intersecting the three ensembles of atoms with appropriate polarizations chosen for cooling or interferometer interrogation. The three ensembles of atoms are positioned coaxially when interrogated.

Gradiometer configuration invariant to laser phase noise and sensor rotations

A system for controlling a phase measurement in an atom interferometer comprising one or more lasers, a processor, and a memory. The one or more lasers are for providing interrogating beams. A first cloud of atoms and a second cloud of atoms traverse an interrogating region of the atom interferometer in substantially opposite directions. The interrogating beams interact substantially simultaneously with both atoms in the first cloud and atoms in the second cloud. The first cloud of atoms and the second cloud of atoms interact with each of the interrogating beams in a different order. The processor is configured to determine a phase adjustment offset of at least one interrogating beam based at least in part on one or more past interactions of one or more interrogating beams with either the first cloud of atoms or the second cloud of atoms.

Phase control for dual atom interferometers

A system for controlling a phase measurement in an atom interferometer comprising one or more lasers, a processor, and a memory. The one or more lasers are for providing interrogating beams. A first group of atoms and a second group of atoms traverse an interrogating region of the atom interferometer in substantially opposite directions. The interrogating beams interact substantially simultaneously with both atoms in the first group and atoms in the second group. The first group of atoms and the second group of atoms interact with each of the interrogating beams in a different order. The processor is configured to determine a phase adjustment offset of at least one interrogating beam based at least in part on one or more past interactions of one or more interrogating beams with either the first group of atoms or the second group of atoms.

The device for producing laser-cooled atoms comprises a two dimensional trap or a three-dimensional trap, or a combination of two- and three-dimensional traps. The two-dimensional trap comprises: three or more permanent magnets arranged around a perimeter of a loop, wherein a plane of the loop is perpendicular to a free axis of the two-dimensional atom trap, and the three or more permanent magnets bracket an internal volume of the two-dimensional atom trap; and one or more laser beam input ports enabling access for one or more laser beams to the internal volume of the two-dimensional atom trap.

Device for producing laser-cooled atoms

A method for optimizing a dc operating drive current of a laser diode is presented. Lasers of a particular type are characterized in terms of the dependency of certain parameters on temperature and of the minimum bias current required for adequate laser speed. The minimum bias current is determined using the operating bias current minus the threshold current all normalized by the threshold current. For individual laser diodes, the threshold current and slope efficiency are obtained at various temperatures to allow calculation at operating temperatures of interest. The minimum laser bias current for speed can then be determined over the operating temperature range. This may be done by setting the optical power to the highest value calculated using this minimum acceptable bias criterion over the operating temperature range. The ac and dc laser driver current sourcing requirements may be computed to ensure laser and module compatibility.

Method for optimizing laser diode operating current

Method and apparatus of attenuating an optical signal without adding extra components is presented. The drive current of the optical signal source is set to meet a predetermined bandwidth requirement and exceed a predetermined amplitude requirement. An optical isolator that is used to prevent back-reflections from reaching the optical signal source is used to achieve the desired amount of attenuation. More specifically, the invention includes controlling the attenuation by tuning an angle &#x3b8; between the transmission axis of a polarizer that is part of the optical isolator and the original polarization state of the optical signal. By increasing the angle &#x3b8;, the amount of attenuation is increased; by decreasing the angle &#x3b8;, the amount of attenuation is decreased. The invention allows continuous tuning of the angle &#x3b8;.

Continuously variable attenuation of an optical signal using an optical isolator

A modular TOSA that is compatible with multiple optical fiber connector standards and a method of making the TOSA are presented. With the invention, a modular TOSA can be made compatible with different connector standards by switching the nose assembly while keeping the port assembly design and the adapter assembly design constant. The nose assembly that is compatible with the desired connector standard is selected from a group of nose assemblies, which are designed to be coupled with the same port assembly but having different connector standards.

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Sunnyvale, CA, United States of America

Todd Gustavson