A5028366570- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Advanced Frequency and Time Standards
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Cold Atom Physics and Bose-Einstein Condensates
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Advanced Fiber Laser Technologies
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Geophysics and Sensor Technology
- Mechanical and Optical Resonators
- Advanced Fiber Optic Sensors
- Photonic Crystal and Fiber Optics
- Radio Astronomy Observations and Technology
- Advanced Measurement and Metrology Techniques
- Magnetic confinement fusion research
- Solid State Laser Technologies
- Seismic Waves and Analysis
- Optical Systems and Laser Technology
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Laser Design and Applications
Leibniz University Hannover
2011-2024
Max Planck Institute for Gravitational Physics
2011-2024
Max Planck Society
2011-2017
Deutsches Elektronen-Synchrotron DESY
2016
Max Planck Innovation
2011
An ultra-stable, high-power cw Nd:YAG laser system, developed for the ground-based gravitational wave detector Advanced LIGO (Laser Interferometer Gravitational-Wave Observatory), was comprehensively characterized. Laser power, frequency, beam pointing and quality were simultaneously stabilized using different active passive schemes. The output beam, performance of stabilization, cross-coupling between stabilization feedback control loops characterized found to fulfill most design...
Collinear coherent combination of multiple single frequency fiber amplifiers is a promising approach to realize the high power laser sources required for 3rd generation gravitational wave detectors (GWD), as long stringent requirements on beam quality and noise properties can be met.Here, we report two coherently combined 10 W with respect GWD.The combining efficiency was larger than 95% 97% in fundamental spatial mode.There no significant increase compared fluctuations amplifier.
ALPS II is a light shining through wall style experiment that will use the principle of resonant enhancement to boost conversion and reconversion probabilities photons relativistic WISPs. This require long baseline low-loss optical cavities. Very high power build up factors in cavities must be achieved order reach design sensitivity II. necessitates number different sophisticated control systems maintain resonance ensure maximal coupling between laser cavity. In this paper we report on...
Abstract Light-shining-through-a-wall experiments represent a new experimental approach in the search for undiscovered elementary particles not accessible with accelerator based experiments. The next generation of these experiments, such as ALPS II, require high finesse, long baseline optical cavities fast length control. In this paper we report on stabilization control loop used to keep 9.2 m cavity resonant. finesse was measured be 101,300 ±500 1064 nm light. Fluctuations differential seen...
The AEI 10 m prototype will be an ultra-low displacement noise facility consisting of L-shaped ultra-high vacuum system with about long arms, excellent seismic isolation, a well-stabilized high power laser and other advanced interferometry techniques. In the first round experiments interferometer to measure at standard quantum limit classical set up. This paper describes status its individual sub-systems as April 2012.
Light-shining-through-a-wall experiments represent a new experimental approach in the search for undiscovered elementary particles not accessible with accelerator based experiments. The next generation of these experiments, such as ALPS II, require high finesse, long baseline optical cavities fast length control. In this paper we report on stabilization control loop used to keep 9.2 m cavity resonant. finesse was measured be 101,300$\pm$500 1064 nm light. Fluctuations differential seen and...
Fabry–Perot cavities are widely used in precision interferometric applications. Various techniques have been developed to achieve the resonance condition via direct interrogation of cavity with main laser field interest. Some use cases, however, require a surrogate for control. In this study, we construct bichromatic study control approach, where and fields related by second-harmonic generation nonlinear optics. We experimentally verify temperature dependence differential reflection phase...
The main purpose of the AEI 10 m Prototype is to reach and eventually surpass Standard Quantum Limit at frequencies ranging from 20 Hz 1 kHz with a arm-length Michelson interferometer named sub-SQL interferometer. frequency control system uses optical path length triangular suspended cavity reference cavity, goal suppressing noise input laser level ~ 10-4 Hz/ rolling off below 6 × 10-6 above kHz. It expected that tight angular cavity's mirrors necessary this stringent requirement.
The first generation of interferometric gravitational wave detectors performed one the most precise differential length measurements ever. However, to measure tiny changes caused by a their sensitivity has be increased even further. technical upgrade Laser Interferometer Gravitational Observatory (LIGO) second detector, called Advanced LIGO, is currently under way. It will presumably reach tenfold improved stram between 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
We collinearly combined two ytterbium doped fiber amplifiers with an output power of 11.4 W to 21.8 W. The system will be used evaluate coherent beam combining in laser systems for gravitational wave detectors.