Thilo Schuldt
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View article: Towards Compact, Robust and Highly Stable Optical Frequency References for Space Applications
Towards Compact, Robust and Highly Stable Optical Frequency References for Space Applications Open
Future space missions from different fields of applications, like global navigation satellite systems (GNSS), next generations of gravity missions or tests of fundamental physics will rely on optical frequency references. While laboratory …
View article: Optical cavity reaching 10<sup>-16</sup> frequency stability with compact optical circulator based in-coupling optics
Optical cavity reaching 10<sup>-16</sup> frequency stability with compact optical circulator based in-coupling optics Open
Future space missions will benefit from highly stable and compact optical frequency references. While many promising technologies are currently under investigation, optical cavities are a well-suited technique for applications in which rel…
View article: STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept
STE-QUEST -- Space Time Explorer and QUantum Equivalence principle Space Test: The 2022 medium-class mission concept Open
Space-borne quantum technologies, particularly those based on atom interferometry, are heralding a new era of strategic and robust space exploration. The unique conditions of space, characterized by low noise and low gravity environments, …
View article: Research campaign: Macroscopic quantum resonators (MAQRO)
Research campaign: Macroscopic quantum resonators (MAQRO) Open
The objective of the proposed macroscopic quantum resonators (MAQRO) mission is to harness space for achieving long free-fall times, extreme vacuum, nano-gravity, and cryogenic temperatures to test the foundations of physics in macroscopic…
View article: MAQRO -- BPS 2023 Research Campaign Whitepaper
MAQRO -- BPS 2023 Research Campaign Whitepaper Open
The objective of the proposed MAQRO mission is to harness space for achieving long free-fall times, extreme vacuum, nano-gravity, and cryogenic temperatures to test the foundations of physics in macroscopic quantum experiments. This will r…
View article: Optical Metrology Terminal for Satellite-to-Satellite Laser Ranging
Optical Metrology Terminal for Satellite-to-Satellite Laser Ranging Open
Interferometric laser ranging is a powerful enabling technology for high-precision satellite-to-satellite tracking within the context of Earth observation, gravitational wave detection, and formation flying. Since the launch of the gravity…
View article: Optical clock technologies for global navigation satellite systems
Optical clock technologies for global navigation satellite systems Open
Future generations of global navigation satellite systems (GNSSs) can benefit from optical technologies. Especially optical clocks could back-up or replace the currently used microwave clocks, having the potential to improve GNSS position …
View article: Long-term stable optical cavity for special relativity tests in space: erratum
Long-term stable optical cavity for special relativity tests in space: erratum Open
We incorrectly cited a maximum acceleration sensitivity of the rigidly-mounted cavity of 2.5 × 10 −10 1/(m s −2 ). The correct coupling factor is a factor of 100 smaller: 2.5 × 10 −12 1/(m s −2 ).
View article: Long-term stable optical cavity for special relativity tests in space
Long-term stable optical cavity for special relativity tests in space Open
BOOST (BOOst Symmetry Test) is a proposed space mission to search for Lorentz invariance violations and aims to improve the Kennedy-Thorndike parameter constraint by two orders of magnitude. The mission consists of comparing two optical fr…
View article: In-Orbit-Verification of Optical Clock Technologies
In-Orbit-Verification of Optical Clock Technologies Open
Optical frequency references are an essential tool for many applications in space, including Earth observation, fundamental physics and navigation and ranging. They are either needed as light source for a high-sensitivity inter-spacecraft …
View article: Frequency stabilized ND:YAG laser for space applications
Frequency stabilized ND:YAG laser for space applications Open
Future space missions rely on the availability of space qualified high precision optical metrology instruments like ultra stable laser sources. Here, we present a compact, frequency-doubled, monolithic Nd:YAG laser (non planar ring-oscilla…
View article: Optical metrology terminal for satellite-to-satellite laser ranging
Optical metrology terminal for satellite-to-satellite laser ranging Open
Interferometric laser ranging is an enabling technology for high-precision satellite-to-satellite tracking within the context of earth observation, gravitational wave detection, or formation flying. In orbit, the measurement system is affe…
View article: A new laser technology for LISA
A new laser technology for LISA Open
Within the European Space Agency (ESA) activity “Gravitational Wave Observatory Metrology Laser” we designed a laser head to fulfill the LISA laser requirements using a non-NPRO seed laser technology: an external cavity diode laser (ECDL) …
View article: An absolute optical frequency reference for space
An absolute optical frequency reference for space Open
A variety of future space missions rely on the availability of high-performance optical frequency references with applications in fundamental physics, geoscience, Earth observation and global satellite navigation systems (GNSS). Examples a…
View article: BOOST: A satellite mission to test Lorentz invariance using high-performance optical frequency references
BOOST: A satellite mission to test Lorentz invariance using high-performance optical frequency references Open
BOOST (BOOst Symmetry Test) is a proposed satellite mission to search for violations of Lorentz
\ninvariance by comparing two optical frequency references. One is based on a long-term stable optical
\nresonator, and the other is based on a…
View article: A heterodyne interferometer for high resolution translation and tilt measurement as optical readout for the LISA inertial sensor
A heterodyne interferometer for high resolution translation and tilt measurement as optical readout for the LISA inertial sensor Open
The space-based gravitational wave detector LISA (Laser Interferometer Space Antenna) requires a high performance position sensor in order to measure the translation and tilt of the free flying test mass with respect to the LISA optical be…
View article: A high sensitivity heterodyne interferometer as a possible optical readout for the LISA gravitational reference sensor and its application to technology verification
A high sensitivity heterodyne interferometer as a possible optical readout for the LISA gravitational reference sensor and its application to technology verification Open
The gravitational wave detector LISA utilizes as current baseline a high sensitivity Optical Readout (ORO) for measuring the relative position and tilt of a free flying proof mass with respect to the satellite housing. The required sensiti…
View article: A high-performance iodine-based frequency reference for space applications
A high-performance iodine-based frequency reference for space applications Open
We present the development of a compact optical frequency reference with a stability in the 10-15 domain at longer integration times utilizing Doppler-free spectroscopy based on molecular iodine. With respect to its future application in s…
View article: Dual absolute and relative high precision laser metrology
Dual absolute and relative high precision laser metrology Open
Design, integration, test setup, test results, and lessons-learnt of a high precision laser metrology demonstrator for dual absolute and relative laser distance metrology are presented. The different working principles are described and th…
View article: Interferometric surface characterization of laser mirrors with sub-nanometer reproducibility for satellite-to-satellite optical metrology
Interferometric surface characterization of laser mirrors with sub-nanometer reproducibility for satellite-to-satellite optical metrology Open
Path length errors caused by beamwalk over the
\nsurface topography of optical components can have a detrimental influence on the accuracy of highly sensitive translational metrology, that is of particular relevance for In-Field Pointing p…
View article: An ultra-stable optical frequency reference for space
An ultra-stable optical frequency reference for space Open
We realized ultra-stable optical frequency references on elegant breadboard (EBB) and engineering model
\n(EM) level utilizing Doppler-free spectroscopy of molecular iodine near 532nm. A frequency stability of about
\n1⋅10-14 at an integra…
View article: mSTAR: Testing Lorentz invariance in a low Earth orbit with high performance optical frequency standards
mSTAR: Testing Lorentz invariance in a low Earth orbit with high performance optical frequency standards Open
fundamental physics test, Kennedy-Thorndike, clocks,
\nultra-stable cavities, iodine spectroscopy, space instrumentation
View article: Iodine frequency references for space
Iodine frequency references for space Open
Optical frequency references are a key element for the realization of future space missions. They are needed for missions related to tests of fundamental physics, gravitational wave detection, Earth observation and navigation and ranging. …
View article: High-Performance Optical Frequency References for Space
High-Performance Optical Frequency References for Space Open
A variety of future space missions rely on the availability of high-Performance optical clocks with applications in fundamental physics, geoscience, Earth observation and
\nnavigation and ranging. Examples are the gravitational wave detect…