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| Number | Title | Issue Date |
| 8183942 | Atomic clock operating with helium 3 An atomic clock comprises helium 3 plasma as measurement medium, which is taken to the plasma state to exploit the metastable state of the material and the levels of the hyperfine structure, the lifetime of which is long and which thus enable an easier measurement t... | 05/22/2012 |
| 8106717 | Quantum gate method and apparatus A method includes causing a common-resonator mode resonating with a transition between |2>i and |3>i that are coupled to each other by a transition having a homogenous broadening ΔEhomo greater than an energy difference between |0> | 01/31/2012 |
| 8098105 | Spin-valve or tunnel-junction radio-frequency oscillator This radio-frequency oscillator includes a magnetoresistive device in which an electric current is able to flow. The magnetoresistive device includes a first magnetic layer, known as a “trapped layer”, whereof the magnetization is of fixed direction. The magneto... | 01/17/2012 |
| 8067991 | Chip-scale atomic clock with two thermal zones A chip-scale atomic clock comprises a physics package and a laser die located in a first thermal zone of the physics package. A quarter wave plate is mounted in the physics package and is in optical communication with the laser die. A vapor cell is mounted in the ph... | 11/29/2011 |
| 8067990 | Atomic oscillator An atomic oscillator includes: a gas cell in which a gaseous metal atom is sealed; heating units heating the gas cell to a predetermined temperature and being a first heater and a second heater; a light source of exciting light exciting the metal atom in the gas cel... | 11/29/2011 |
| 8063709 | Spin-transfer torque oscillator The invention relates to a method of operating a spin-transfer torque structure to generate voltage oscillations, said structure comprising a first layer of magnetic material having a fixed magnetization vector, a spacer of non magnetic material and a second layer o... | 11/22/2011 |
| 8058936 | Atomic ion clock with two ion traps, and method to transfer ions An atomic ion clock with a first ion trap and a second ion trap, where the second ion trap is of higher order than the first ion trap. In one embodiment, ions may be shuttled back and forth from one ion trap to the other by application of voltage ramps to the electr... | 11/15/2011 |
| 7999626 | Physical section of atomic oscillator A physical section of an atomic oscillator includes at least: a gas cell including a cylindrical portion and first and second windows respectively hermetically-closing openings of both sides of the cylindrical portion to form a cavity in which gaseous metal atoms ar... | 08/16/2011 |
| 7973611 | Middle layer of die structure that comprises a cavity that holds an alkali metal An apparatus in one example comprises a die structure that comprises a middle layer, a first outside layer, and a second outside layer. The middle layer comprises a cavity that holds an alkali metal, and one of the first outside layer and the second outside layer co... | 07/05/2011 |
| 7965148 | Atomic frequency clock systems and methods One embodiment of the invention includes an atomic clock system including an alkali beam cell and an interrogation system configured to generate an optical pump beam and at least one optical probe beam that illuminate a detection chamber of the beam cell to pump eva... | 06/21/2011 |
| 7965147 | Physics package design for a cold atom primary frequency standard A physic package for an atomic clock comprising: a block made of optical glass, a glass ceramic material or another suitable material that includes a plurality of faces on its exterior and a plurality of angled borings that serve as a vacuum chamber cavity, light pa... | 06/21/2011 |
| 7956697 | Atomic oscillator An atomic oscillator that controls an oscillation frequency by using an optical absorption property derived from a quantum interference effect occurring when two kinds of resonance light are made incident as coherent light having different wavelengths from each othe... | 06/07/2011 |
| 7944317 | Cold atom micro primary standard An atomic clock having a physics package that includes a vacuum chamber cavity that holds atoms of Rb-87 under high vacuum conditions, an optical bench having a single laser light source, a local oscillator, a plurality of magnetic field coils, an antenna, at least ... | 05/17/2011 |
| 7940133 | Atomic frequency acquiring apparatus and atomic clock An atomic frequency acquisition apparatus includes: a cell enclosing atomic gas therein; a laser light source that oscillates a laser light that enters the cell and excites the atomic gas; and a photodetecting section that detects the laser light that has passed thr... | 05/10/2011 |
| 7893780 | Reversible alkali beam cell One embodiment of the invention includes an alkali beam cell system that comprises a reversible alkali beam cell. The reversible alkali beam cell includes a first chamber configured as a reservoir chamber that is configured to evaporate an alkali metal during a firs... | 02/22/2011 |
| 7859349 | Fully integrated tuneable spin torque device for generating an oscillating signal and method for tuning such apparatus The present invention is related to a device and corresponding methods for generating an oscillating signal. The device comprises a means for providing a current of spin polarised charge carriers, a magnetic, e.g. ferromagnetic, excitable layer adapted for receiving... | 12/28/2010 |
| 7859350 | Microfabricated ion frequency standard A microfabricated ion frequency standard (i.e. an ion clock) is disclosed with a permanently-sealed vacuum package containing a source of ytterbium (Yb) ions and an octupole ion trap. The source of Yb ions is a micro-hotplate which generates Yb atoms which are then ... | 12/28/2010 |
| 7852163 | Batch-fabricated, RF-interrogated, end transition, chip-scale atomic clock A chip scale atomic clock is disclosed that provides a low power atomic time/frequency reference that employs direct RF-interrogation on an end-state transition. The atomic time/frequency reference includes an alkali vapor cell containing alkali atoms, preferably ce... | 12/14/2010 |
| 7795984 | Magnetic oscillator with multiple coherent phase output Apparatus to generate signals with multiple phases are described. The apparatus includes a fixed multilayer stack providing a varying magnetic field and at least two sensors adjacent the fixed multilayer stack to sense the varying magnetic field and generate at leas... | 09/14/2010 |
| 7701302 | Atomic frequency acquiring apparatus and atomic clock An atomic frequency acquisition apparatus includes: a cell enclosing atomic gas therein; a laser light source that oscillates a laser light that enters the cell and excites the atomic gas; and a photodetecting section that detects the laser light that has passed thr... | 04/20/2010 |
| 7656241 | Optical pumping device and method A method for optical pumping of particles and a device for implementing same. The particles (14) are changed from one long lifetime level to another long lifetime level via a short lifetime level by means of interaction with light radiation (16) emitte... | 02/02/2010 |
| 7619485 | Compact optical assembly for chip-scale atomic clock Provided is a chip-scale atomic clock having a folded optic configuration or physics package. In particular, the physics package includes a vapor cell for containing gaseous alkali atoms and a VCSEL for generating a laser light One or more heating elements are posit... | 11/17/2009 |
| 7589600 | Spin oscillator device A spin oscillator device generates a microwave output in response to an applied DC current. The device includes a spin momentum transfer (SMT) stack including a top electrode, a free layer, a nonmagnetic layer, a pinned magnetic structure, and a bottom electrode. A ... | 09/15/2009 |
| 7501906 | Method for modulating an atomic clock signal with coherent population trapping and corresponding atomic clock Method for modulating an atomic clock signal and a corresponding atomic clock. The laser beams (L1, L2) are pulse-modulated in amplitude to illuminate (A) an interactive medium. A detection (B) of the current pulse (Sr) and of the pulses (Sr−1 to Sr... | 03/10/2009 |
| 7468637 | Batch-fabricated, RF-interrogated, end transition, chip-scale atomic clock A chip scale atomic clock is disclosed that provides a low power atomic time/frequency reference that employs direct RF-interrogation on an end-state transition. The atomic time/frequency reference includes an alkali vapor cell containing alkali atoms, preferably ce... | 12/23/2008 |
| 7446618 | Atomic frequency acquiring apparatus and atomic clock An atomic frequency acquisition apparatus includes: a cell enclosing atomic gas therein; a laser light source that oscillates laser light that enters the cell and excites the atomic gas; and a photodetecting section that detects the laser light that has passed the c... | 11/04/2008 |
| 7439814 | Method and system for operating an atomic clock with simultaneous control of frequency and magnetic field The present invention relates to a method and system in which multi-coherent resonances of a microwave in which the alkali-metal atoms in the ground state are driven simultaneously by a microwave hyperfine frequency ΩH and a Zeeman frequency ΩZ | 10/21/2008 |
| 7400207 | Anodically bonded cell, method for making same and systems incorporating same A cell suitable for use with an atomic clock and a method for making the same, the cell including: a silicon wafer having a recess formed therein; at least one amorphous silicate member having an ion mobility and temperature expansion coefficient approximately that ... | 07/15/2008 |
| 7378913 | Optically excited atomic frequency standard An optically-excited atomic frequency standard that subjects alkali metal atoms (111) to circularly-polarized optical radiation. The atomic frequency standard is improved by the use of a circular polarizer (202) to control the intensity of the circular... | 05/27/2008 |
| 7345553 | Method and apparatus for reducing errors due to line asymmetry in devices utilizing coherent population trapping An apparatus and method for measuring CPT is disclosed. The apparatus includes a quantum absorber that is irradiated by radiation from an electromagnetic radiation source. The quantum absorber includes a material that exhibits CPT. The electromagnetic radiation sour... | 03/18/2008 |
| 7338615 | Dielectric media A novel method of fabrication of periodic dielectric composites involving a flexible computer design stage, rapid growth of a second dielectric component. Laser stereolithography is used to form the polymer material layer by layer by photopolymerisation of a liquid.... | 03/04/2008 |
| 7323941 | Method and system for operating a laser self-modulated at alkali-metal atom hyperfine frequency The present invention provides a method and apparatus for making atomic clocks or atomic magnetometers as self-modulated laser systems based on the physics of push-pull optical pumping. An atomic vapor cell is required to be in the laser cavity. With proper conditio... | 01/29/2008 |
| 7319522 | Systems and methods for in situ spectroscopic measurements A circularizated semiconductor laser diode (CSLD), such as for example a vertical cavity surface emitting laser (VCSEL) may be used for optical measurements. The CSLD may be used in a cell density probe to perform cell density determination and/or turbidity determin... | 01/15/2008 |
| 7292111 | Middle layer of die structure that comprises a cavity that holds an alkali metal An apparatus in one example comprises a die structure that comprises a middle layer, a first outside layer, and a second outside layer. The middle layer comprises a cavity that holds an alkali metal, and one of the first outside layer and the second outside layer co... | 11/06/2007 |
| 7260500 | Method and apparatus for monitoring and verifying equipment status An equipment status monitoring system having at least one multi-modal resonator included as a part of a semiconductor processing system and a power source coupled to the at least one multi-modal resonator. The power source is configured to produce a microwave excita... | 08/21/2007 |
| 7241630 | Paramagnetic particle detection A method of determining the number of magnetic particles within a sample using a tuned circuit having a capacitor and a coil. The method comprises: a. determining the difference in the resonant frequency of the tuned circuit when t... | 07/10/2007 |
| 7229669 | Thin-film deposition methods and apparatuses Described are structures useful in microelectronic or MEMS devices such as atomic clocks, sensors, and RF switches, wherein a first material is deposited onto a substrate to define a first material area of coverage and a second material is deposited over the first m... | 06/12/2007 |
| 7221231 | Discharge lamp stabilization system An RF-discharge lamp stabilization system for preferred use in a Rubidium atomic clock, senses acoustic oscillations of plasma ions in the 20.0 kHz range to assess the performance of the lamp for determining radio frequency parameters of the lamp while the lamp is i... | 05/22/2007 |
| 7215213 | Apparatus and system for suspending a chip-scale device and related methods A suspension of a chip-scale device is accomplished using a suspension frame and at least one first tether. The chip-scale suspension frame defines a first plane and an opening through the suspension frame. At least one first tether crosses the opening at a first an... | 05/08/2007 |
| 7202751 | Optically pumped frequency standard with reduces AC stark shift An apparatus for generating a stabilized frequency signal is disclosed. The apparatus includes a quantum absorber having first, second, and third energy states. The quantum absorber is irradiated by a first radiation source that generates electromagnetic radiation h... | 04/10/2007 |
