A5016868008- Advanced Frequency and Time Standards
- Combustion and flame dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Turbomachinery Performance and Optimization
- Advanced Fiber Laser Technologies
- Atomic and Subatomic Physics Research
- Solid State Laser Technologies
- Heat Transfer Mechanisms
- Quantum Computing Algorithms and Architecture
- Advanced Combustion Engine Technologies
- Orbital Angular Momentum in Optics
- Hemodynamic Monitoring and Therapy
- Scientific Measurement and Uncertainty Evaluation
- Computational Fluid Dynamics and Aerodynamics
- Quantum optics and atomic interactions
- Quantum Information and Cryptography
- Fluid Dynamics and Turbulent Flows
Humboldt-Universität zu Berlin
2019-2022
University of Wisconsin–Milwaukee
2013
We present a user-friendly and versatile tool for laser frequency stabilization. Its main focus is spectroscopy locking, but the software suitable lock-in techniques in general as well bare proportional-integral-derivative (PID) operation. Besides allowing sinusoidal modulation (up to 50 MHz), triangular ramp scanning, in-phase quadrature demodulation (1-5 f), infinite impulse response, PID filtering, Linien features two different algorithms automatic lock point selection; one of them...
Compactness, robustness and autonomy of optical frequency references are prerequisites for reliable operation in mobile systems, on ground as well space. We present a standalone plug play reference device based modulation spectroscopy the D2-transition rubidium at 780 nm. After single button press hand-sized laser module, micro-integrated laser-optical bench described [J. Opt. Soc. Am. B38, 1885 (2021)10.1364/JOSAB.420875], works fully autonomous generates 6 mW stabilized light with relative...
Space-borne optical frequency references based on spectroscopy of atomic vapors may serve as an integral part compact clocks, which can advance global navigation systems, or be utilized for earth observation missions laser systems cold atom gradiometers. Nanosatellites offer low launch-costs, multiple deployment opportunities and short payload development cycles, enabling rapid maturation underlying key technologies in space. Towards in-orbit demonstration such a platform, we have developed...
In this paper, we present a technique for magneto-optical cooling and trapping of neutral atoms using single laser. The alternating-frequency trap (AF-MOT) uses an agile light source that sequentially switches between repumping transition frequencies by tuning the injection current laser diode. We report on experimental demonstration such system 87Rb 85Rb based microintegrated extended cavity diode performing frequency jumps up to 6.6 GHz with time in microsecond regime repetition rate 7.6...
Gas turbines are used in power production and aerojet propulsion, where the required form of energy is obtained by burning fuel, whether it propulsion an aircraft or simply electricity for our homes. Burning fuels accompanied high temperature combustion products that must flow through a gas turbine to generate power. These diluted with lower air reach desirable blade can withstand. Even after mixing, not very uniform some hot spots may cause thermal stresses on blades. The present paper...
High temperatures within the primary vane of a gas turbine system have been known to cause blade failure due high and stark, unexpected non-uniformities in expelled gaseous product. Thus, aid prevention these costly potentially dangerous failures, this study aimed find ways experimentally decrease temperature spontaneity at nozzle by employing blunt object guide vanes common dilution hole approach cool air simulator. Previous computational studies outlining scenarios were produced, verified...
A number of studies have shown that the flow field exiting a combustor gas turbine cycle is highly non-uniform in pressure, velocity and, most importantly, temperature. Much research has been dedicated to cooling blades using internal, film cooling, impingement jets, and pin/fin technologies. Such designs allow for heated be cooled from inside out. While advancements this type blade technology provide effective means reduce occurrence failure due material overheat conditions, effect...
Bayesian optimization is an efficient numerical tool. We review approaches to improve its scalability and handle noisy inputs, we demonstrate applications in pho- tonics design control of quantum experiments.