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
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Journal ArticleDOI
10 GHz generation with ultra-low phase noise via the transfer oscillator technique
TL;DR: In this paper , a transfer oscillator technique was employed to suppress additive optical frequency comb noise, which relaxes the stabilization requirements and allows for the extraction of multiple independent microwave outputs from a single comb, while at the same time, permitting low-noise microwave generation from combs with higher noise profiles.
Journal ArticleDOI
Double-heterodyne probing for ultra-stable laser based on spectral hole burning in a rare-earth doped crystal
N. Galland,N. Lučić,S. Zhang,H. Alvarez-Martinez,R. Le Targat,Alban Ferrier,Philippe Goldner,Bess Fang,S. Seidelin,Y. Le Coq +9 more
TL;DR: In this paper, an experimental technique for realizing a specific absorption spectral pattern in a rare-earth-doped crystal at cryogenic temperatures is presented, where the pattern is subsequently probed on two spectral channels simultaneously, thereby producing an error signal allowing frequency locking of a laser on the said spectral pattern.
Journal ArticleDOI
Tests of Cryogenic Fabry–Perot Cavity with Mirrors on Different Substrates
Mickail V. Kuvshinskii,S. I. Oreshkin,Sergei Popov,V. N. Rudenko,I. S. Yudin,Valentina V. Azarova,Sergei V. Blagov +6 more
TL;DR: In this article, an infrared laser with a wavelength of 1.064 microns was used to measure the integral properties of the Fabry-Perot optical resonators in vacuum at low temperatures.
DissertationDOI
A long optical cavity for sub-Hertz laser spectroscopy
TL;DR: In this article, the authors presented a 39.5 cm long optical cavity featuring an estimated thermal noise limited frequency stability at the level of 7×10−17 at 1 s. The measurements were performed after transferring the laser via a 350 m long stabilized optical fiber.
Journal ArticleDOI
Wavelength-Tunable Ultra-Stable Optical Frequency Comb Based on All-Polarization-Maintaining Fiber Laser
TL;DR: In this article, the authors describe the implementation of a wavelength-tunable ultra-stable optical frequency comb (OFC), which is generated by a passively mode-locked all-polarization-maintaining Erbium (Er)-doped fiber laser based on a nonlinear amplifying loop mirror.
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.