A5005991809- Pulsars and Gravitational Waves Research
- Pulsed Power Technology Applications
- Scientific Measurement and Uncertainty Evaluation
- Advanced Sensor Technologies Research
- Terahertz technology and applications
- Geophysics and Gravity Measurements
- Cold Atom Physics and Bose-Einstein Condensates
- Seismic Waves and Analysis
- Cosmology and Gravitation Theories
- Semiconductor Quantum Structures and Devices
- Gyrotron and Vacuum Electronics Research
- Calibration and Measurement Techniques
Physikalisch-Technische Bundesanstalt
2002-2024
Abstract We present here the first comparison between National Metrology Institutes of high accuracy continuous wave optical power measurements in kilowatt regime. The Institute Standards and Technology (NIST) performed with a meter relying on photon momentum. Physikalisch-Technische Bundesanstalt (PTB) modified off-the-shelf thermal meter. non-absorbing momentum measurement approach permits two meters to measure same laser beam path simultaneously, resulting direct supported by an system...
Abstract Current gravitational wave (GW) observatories rely on photon calibrators that use laser radiation pressure to generate displacement fiducials used calibrate detector output signals. Reducing calibration uncertainty enables optimal extraction of astrophysical information such as source distance and sky position from detected For the ongoing O4 observing run started 24 May 2023, global GW network is employing a new scheme with transfer standards calibrated at both National Institute...
Abstract In this work, we review the viability and precision of photon-momentum-based optical power measurement method that employs an amplification effect caused by a multi-reflected laser beam trapped in cavity. Measuring total momentum transfer absorbed re-emitted photons from highly reflective surface (reflection mirror) as force provides possibility measuring with direct traceability to SI units. Trial measurements were performed at two different metrology laboratories: laboratory for...
A technique that allows for the transfer of 3.3 (4.9) picosecond voltage pulses to electronic devices with coaxial (coplanar) transmission line geometry is presented. Using this method, circuits can be characterised at frequencies well above 100 GHz.
Presents a method that allows one to launch 3.3 (4.9) ps voltage pulses into coaxial (coplanar) transmission lines. With this technique, high frequency-components can be characterized at frequencies well above 100 GHz.