Aosense, Inc.

Martin M Boyd

Brian R Patton

Adam T Black

Miao Zhu

Micah Ledbetter

Mark A Kasevich

Michael R Matthews

Miroslav Y Shverdin

Matthew Todd Cashen

Thomas H Loftus

Thang Q Tran

Ying-Ju Wang

Igor Teper

Alexander F Sugarbaker

Matthew D Swallows

Akash Rakholia

A high bandwidth gravimeter or accelerometer includes laser(s), modulator(s), and an atomic interferometer. The laser(s) and modulator(s) produce four laser frequencies. A first and second pair of laser frequencies are each separated by w. The first and second pair are offset by w. A first laser frequency of the first pair and a second laser frequency of the second pair are separated by w+w. A second laser frequency of the first pair and a first laser frequency of the second pair are separated by w&#x2212;w. The first pair is routed to arrive from a first direction at atoms in an interaction region, and the second pair from a second direction. The first pair are phase stable with respect to the second pair. wis adjusted so that w+wor w&#x2212;wcorresponds to a Raman resonance for the atomic interferometer.

High-bandwidth atom-interferometric gravimetry and accelerometry

An atomic oscillator device includes an atomic oscillator, a controlled oscillator, a resonance controller, and a cold-atom clock output. The atomic oscillator comprises a two-dimensional optical cooling region (2D OCR) for providing a source of atoms and a three-dimensional optical cooling region (3D OCR) for cooling and/or trapping the atoms emitted by the 2D OCR. The atomic oscillator comprises a microwave cavity surrounding the 3D OCR for exciting an atomic resonance. The controlled oscillator produces an output frequency. The resonance controller is for steering the output frequency of the controlled oscillator based on the output frequency and the atomic resonance as measured using an atomic resonance measurement. The cold-atom clock output is configured as being the output frequency of the controlled oscillator.

Architecture for compact cold atom clocks

A device for preparing an ensemble of laser-cooled atoms and measuring their population includes a laser and a set of reflecting surfaces. The laser is able to produce a laser beam. The set of reflecting surfaces disposed to direct the laser beam along a multi-dimensional beam path to intersect a central space multiple times from different directions and retroreflect the laser beam to retrace the multi-dimensional beam path. The central space is able to have an ensemble of atoms or molecules. The atoms or the molecules are able to be cooled along one or more dimensions by the laser beam sent along the multi-dimensional beam path and able to be detected in the central space by an effect upon the laser beam sent along the multi-dimensional beam path.

Integrated optical detection for atomic clocks and sensors

A system for an atomic interferometer includes a laser control system and a feedback control system. The laser control system controls a first pointing angle of a first interrogating laser beam. The first interrogating laser beam and a second interrogating laser beam interrogate a pair of almost counter-propagating laser cooled atomic ensembles. The feedback control system adjusts the first pointing angle based at least in part on an inertial measurement using the atomic interferometer to bias an output of the atomic interferometer to compensate for the effects of rotations. The pointing angle of the laser beam, which is linearly related to a frequency used to drive an acousto-optic deflector, is linearly related to the rotation rate of the sensor.

Automatic biasing and closed loop control of an atomic interferometer

A laser system for atomic clocks and sensors includes a single laser, an intensity splitter, a modulator, and a feedback-based lock controller. The single laser outputs a central optical frequency of laser light that can be tuned. The intensity splitter splits the laser light along a first and a second optical path. A modulator is disposed in the first optical path. The portion of laser light from the first optical path is subjected to the modulator with the modulator disposed to generate a frequency-shifted sideband from some or all of the portion of the laser light subjected to the modulator, with the frequency-shifted sideband shifted by an adjustable frequency source, resulting in an adjustable frequency offset between the frequency-shifted sideband and an unmodulated carrier propagating in the second optical path. The feedback-based lock controller locks the optical frequency of the frequency-shifted sideband to a repumping transition for atom cooling.

Laser system for atomic clocks and sensors

Growing community of inventors

Sunnyvale, CA, United States of America

Martin M Boyd