Journal ArticleDOI
Tenfold reduction of Brownian noise in high-reflectivity optical coatings
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TLDR
In this article, direct-bonded monocrystalline multilayers are used for optical interferometry, which exhibit both intrinsically low mechanical loss and high optical quality.Abstract:
Thermally induced fluctuations impose a fundamental limit on precision measurement. In optical interferometry, the current bounds of stability and sensitivity are dictated by the excess mechanical damping of the high-reflectivity coatings that comprise the cavity end mirrors. Over the last decade, the dissipation of these amorphous multilayer reflectors has at best been reduced by a factor of two. Here, we demonstrate a new paradigm in optical coating technology based on directbonded monocrystalline multilayers, which exhibit both intrinsically low mechanical loss and high optical quality.read more
Citations
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Journal ArticleDOI
Phase Locking a Clock Oscillator to a Coherent Atomic Ensemble
Ralf Kohlhaas,Ralf Kohlhaas,Andrea Bertoldi,Etienne Cantin,Etienne Cantin,Alain Aspect,Arnaud Landragin,Philippe Bouyer,Philippe Bouyer +8 more
TL;DR: In this article, the phase lock of the clock oscillator to an atomic superposition state was used to improve the sensitivity of an atomic interferometer under local oscillator noise.
Journal ArticleDOI
Compact, thermal-noise-limited reference cavity for ultra-low-noise microwave generation.
Josue Davila-Rodriguez,Fred N. Baynes,Andrew D. Ludlow,Tara M. Fortier,Holly Leopardi,Scott A. Diddams,Franklyn Quinlan +6 more
TL;DR: An easy-to-manufacture 25-mm-long ultra-stable optical reference cavity for transportable photonic microwave generation systems is demonstrated using a rigid holding geometry that is first-order insensitive to the squeezing force and a cavity geometry that improves the thermal noise limit at room temperature.
Journal ArticleDOI
Demonstration of Displacement Sensing of a mg-Scale Pendulum for mm- and mg-Scale Gravity Measurements.
Nobuyuki Matsumoto,Nobuyuki Matsumoto,Seth B. Cataño-Lopez,M. Sugawara,Seiya Suzuki,N. Abe,Kentaro Komori,Yuta Michimura,Yoichi Aso,Keiichi Edamatsu +9 more
TL;DR: Sensitive displacement sensing of the Brownian motion of an optically trapped 7 mg pendulum motion whose natural quality factor is increased to 10^{8} through dissipation dilution is demonstrated.
Journal ArticleDOI
Silicon-Based Optical Mirror Coatings for Ultrahigh Precision Metrology and Sensing.
Jessica Steinlechner,Jessica Steinlechner,I. W. Martin,A. S. Bell,J. H. Hough,M. Fletcher,P. G. Murray,R. Robie,Sheila Rowan,Roman Schnabel +9 more
TL;DR: An improvement is demonstrated with respect to the lowest so far reported optical absorption of amorphous silicon at near-infrared wavelengths with a combination of heat treatment, final operation at low temperature, and a wavelength of 2 μm instead of the more commonly used 1550 nm.
Journal ArticleDOI
Spectroscopy and frequency measurement of the $^{87}$Sr clock transition by laser linewidth transfer using an optical frequency comb
Daisuke Akamatsu,Hajime Inaba,Kazumoto Hosaka,Masami Yasuda,Atsushi Onae,Tomonari Suzuyama,Masaki Amemiya,Feng-Lei Hong +7 more
TL;DR: In this article, the authors performed spectroscopic observations of the 698-nm clock transition in an optical lattice using a laser linewidth transfer technique and determined that the absolute frequency of the 5s$2}$$ $^{1}$S$0}$ - 5s5p $^{3}$P$ 0.0 (1.6) Hz referenced to the SI second.
References
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Journal ArticleDOI
Irreversibility and Generalized Noise
TL;DR: In this article, a relation between the generalized resistance and the generalized forces in linear dissipative systems is obtained, which forms the extension of the Nyquist relation for the voltage fluctuations in electrical impedances.
Journal ArticleDOI
LIGO: The Laser Interferometer Gravitational-Wave Observatory.
Alex Abramovici,W. E. Althouse,R. W. P. Drever,Yekta Gursel,Seiji Kawamura,F. J. Raab,David H. Shoemaker,L. Sievers,Robert Spero,Kip S. Thorne,R. E. Vogt,Rainer Weiss,S. E. Whitcomb,Michael E Zucker +13 more
TL;DR: The goal of the Laser Interferometer Gravitational-Wave Observatory (LIGO) Project is to detect and study astrophysical gravitational waves and use data from them for research in physics and astronomy.
Journal ArticleDOI
Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place
Till Rosenband,David Hume,Piet O. Schmidt,Chin-Wen Chou,A. Brusch,Luca Lorini,Windell H. Oskay,Robert E. Drullinger,Tara M. Fortier,Jason Stalnaker,Scott A. Diddams,William C. Swann,Nathan R. Newbury,Wayne M. Itano,David J. Wineland,J. C. Bergquist +15 more
TL;DR: Repeated measurements during the past year yield a preliminary constraint on the temporal variation of the fine-structure constant α of α ofbatchmode, a regime of operation for atomic clocks based on optical transitions, promising even higher performance.
Journal ArticleDOI
LIGO: The Laser Interferometer Gravitational-Wave Observatory
TL;DR: Laser Interferometric Gravitational-Wave Observatory (LIGO) as discussed by the authors is a project to detect and study gravitational waves of astrophysical origin, which holds the promise of testing general relativity in the strong-field regime, providing a new probe of exotic objects such as black hole and neutron stars, and uncovering unanticipated new astrophysics.
Journal ArticleDOI
LIGO: The laser interferometer gravitational-wave observatory
TL;DR: LIGO as discussed by the authors is a trio of extremely sensitive Michelson interferometers built to detect gravitational waves from space, and the results of their recent observations are described in detail.