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Showing 1–12 of 12 results
Advanced filters: Author: William J Drever Clear advanced filters

  • A synthesizer that combines a fixed low-noise photonic oscillator and a direct digital synthesizer—and is based on components that can all be integrated on chip—can create microwave signals that are tunable with low noise.

    • Igor Kudelin
    • Pedram Shirmohammadi
    • Scott A. Diddams
    Research
    Nature Electronics
    Volume: 7, P: 1170-1175

  • Most atom-based quantum networks emit photons at non-telecom wavelengths, requiring lossy conversion for long-distance links. A scalable approach for generating direct entanglement between atoms and telecom-band photons has now been demonstrated.

    • Lintao Li
    • Xiye Hu
    • Jacob P. Covey
    Research
    Nature Physics
    Volume: 21, P: 1826-1833

  • The authors demonstrate an exciting technique to cancel the common-mode vibration of a photonic resonator upon optical frequency division to microwave frequencies. The resulting 10 GHz microwave achieves 22.6 dB suppression of vibration noise, without incurring any penalty in phase-noise performance.

    • William Loh
    • Dodd Gray
    • Siva Yegnanarayanan
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-9

  • A chip-integrated laser with 7.5 × 10−14 fractional frequency instability is demonstrated by active stabilization to an on-chip 6.1-m-long spiral resonator. By using this laser to interrogate the narrow-linewidth transition of 88Sr+, a clock instability averaging down as \(3.9\times 1{0}^{-14}/\sqrt{\tau }\) is achieved.

    • William Loh
    • David Reens
    • Robert McConnell
    Research
    Nature Photonics
    Volume: 19, P: 277-283

  • By using a stimulated Brillouin scattering laser in a strontium-ion optical clock instead of the usual bulk-cavity-stabilized laser, the need for vacuum is removed and resonator volume is substantially reduced.

    • William Loh
    • Jules Stuart
    • Robert McConnell
    Research
    Nature
    Volume: 588, P: 244-249

  • We leverage advances in integrated photonics to generate low-noise microwaves with an optical frequency division architecture that can be low power and chip integrated.

    • Igor Kudelin
    • William Groman
    • Scott A. Diddams
    ResearchOpen Access
    Nature
    Volume: 627, P: 534-539

  • Substantial improvements, through the use of squeezed light, in the sensitivity of a prototype gravitational-wave detector built with quasi-free suspended optics represents the next step in moving such devices out of the lab and into orbit.

    • K. Goda
    • O. Miyakawa
    • N. Mavalvala
    Research
    Nature Physics
    Volume: 4, P: 472-476

  • Squeezed states of light have been experimentally demonstrated to improve the performance of the Laser Interferometer Gravitational-wave Observatory (LIGO) in astrophysically relevant frequency regions. This enhanced performance may help to reach the sensitivity required for detecting gravitational waves.

    • J. Aasi
    • J. Abadie
    • J. Zweizig
    Research
    Nature Photonics
    Volume: 7, P: 613-619

  • ‘Squeezed light’ enables quantum noise in one aspect of light to be reduced by increasing the noise, or more accurately the quantum uncertainty, of a complementary aspect. This has now been used to push the detectors at the heart of the GEO600 gravitational wave observatory to unprecedented levels of sensitivity.

    • J. Abadie
    • B. P. Abbott
    • J. Zweizig
    Research
    Nature Physics
    Volume: 7, P: 962-965

  • A stochastic background of gravitational waves is expected to arise from a superposition of a large number of unresolved gravitational-wave sources and should carry unique signatures from the earliest epochs of the Universe. Limits on the amplitude of the stochastic gravitational-wave background are now reported using the data from a two-year science run of the Laser Interferometer Gravitational-wave Observatory. These limits rule out certain models of early Universe evolution.

    • B. P. Abbott
    • R. Abbott
    • J. Zweizig
    Research
    Nature
    Volume: 460, P: 990-994