Squeezed States of Light for Future Gravitational Wave Detectors at a Wavelength of 1550 nm

verfasst von: Fabian Meylahn, Benno Willke, Henning Vahlbruch
Abstract: The generation of strongly squeezed vacuum states of light is a key technology for future ground-based gravitational wave detectors (GWDs) to reach sensitivities beyond their quantum noise limit. For some proposed observatory designs, an operating laser wavelength of 1550 nm or around 2 μm is required to enable the use of cryogenically cooled silicon test masses for thermal noise reduction. Here, we present for the first time the direct measurement of up to 11.5 dB squeezing at 1550 nm over the complete detection bandwidth of future ground-based GWDs ranging from 10 kHz down to below 1 Hz. Furthermore, we directly observe a quantum shot-noise reduction of up to (13.5±0.1) dB at megahertz frequencies. This allows us to derive a precise constraint on the absolute quantum efficiency of the photodiode used for balanced homodyne detection. These results hold important insight regarding the quantum noise reduction efficiency in future GWDs, as well as for quantum information and cryptography, where low decoherence of nonclassical states of light is also of high relevance.
Organisationseinheit(en): Institut für Gravitationsphysik
QuantumFrontiers
Externe Organisation(en): Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)
Typ: Artikel
Journal: Physical review letters
Band: 129
ISSN: 1079-7114
Publikationsdatum: 16.09.2022
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Physik und Astronomie (insg.)
Elektronische Version(en): https://doi.org/10.1103/physrevlett.129.121103 (Zugang: Offen)

BibTeX

@article{edc744af617c48fe845dd87a5c540d97,
title = "Squeezed States of Light for Future Gravitational Wave Detectors at a Wavelength of 1550 nm",
abstract = "The generation of strongly squeezed vacuum states of light is a key technology for future ground-based gravitational wave detectors (GWDs) to reach sensitivities beyond their quantum noise limit. For some proposed observatory designs, an operating laser wavelength of 1550 nm or around 2 μm is required to enable the use of cryogenically cooled silicon test masses for thermal noise reduction. Here, we present for the first time the direct measurement of up to 11.5 dB squeezing at 1550 nm over the complete detection bandwidth of future ground-based GWDs ranging from 10 kHz down to below 1 Hz. Furthermore, we directly observe a quantum shot-noise reduction of up to (13.5±0.1) dB at megahertz frequencies. This allows us to derive a precise constraint on the absolute quantum efficiency of the photodiode used for balanced homodyne detection. These results hold important insight regarding the quantum noise reduction efficiency in future GWDs, as well as for quantum information and cryptography, where low decoherence of nonclassical states of light is also of high relevance.",
author = "Fabian Meylahn and Benno Willke and Henning Vahlbruch",
note = "Funding Information: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy–EXC-2123 QuantumFrontiers–390837967. ",
year = "2022",
month = sep,
day = "16",
doi = "10.1103/physrevlett.129.121103",
language = "English",
volume = "129",
journal = "Physical review letters",
issn = "1079-7114",
publisher = "American Physical Society",
number = "12",
}