Differential laser Doppler vibrometry for displacement measurements down to 1 mHz with 1 nm amplitude resolution in harsh environments

M Schewe, D Kohlmann, H Wulfmeier, H Fritze… - Measurement, 2023 - Elsevier
Environmental disturbances increasingly limit laser Doppler vibration measurements with
decreasing frequency of the moving surface. Particularly limiting for the detection of small …

Improved demodulated phase signal resolution for carrier signals with small modulation index by clipping and synchronous sampling for heterodyne interferometers

M Yu, M Schewe, G Bauer, C Rembe - Scientific Reports, 2023 - nature.com
Digitization of phase-modulated carrier signals with a commercially available analog-to-
digital converter (ADC) is a common task in many communication and sensor applications …

Chemical expansion of CeO2−δ and Ce0.8Zr0.2O2−δ thin films determined by laser Doppler vibrometry at high temperatures and different oxygen partial …

D Kohlmann, H Wulfmeier, M Schewe, I Kogut… - Journal of Materials …, 2023 - Springer
The chemical expansion of ceria (CeO2− δ) and ceria-zirconia (Ce0. 8Zr0. 2O2− δ, CZO80)
thin films is investigated by high-temperature laser Doppler vibrometry (LDV) at …

High-temperature chemical expansion of Pr0. 1Ce0. 9O2-δ thin films determined by Differential Laser Doppler Vibrometry

D Kohlmann, H Wulfmeier, M Schewe, T Defferriere… - Solid State Ionics, 2023 - Elsevier
The chemical expansion of thin-film praseodymium‑cerium oxide solid solutions (Pr 0.1 Ce
0.9 O 2− δ, PCO10) is investigated at temperatures ranging from 500° C to 800° C and …

Flyable Mirror: Airborne laser Doppler vibrometer for large engineering structures

M Schewe, MAA Ismail, R Zimmermann… - Journal of Physics …, 2024 - iopscience.iop.org
Large engineering structures are subjected to extreme loads that may lead to early damage
and hazards for the national economy and public safety. The laser Doppler vibrometer (LDV) …

Measuring turbulence parameters with high precision through the smooth perturbation method

K Tolchkova, C Rembe - Optical Instrument Science …, 2024 - spiedigitallibrary.org
The refractive index structure constant C 2 n and the microscale ℓ 0 of turbulence contribute
as crucial indicators of turbulence strength in a medium, such as the atmosphere. These …

[PDF][PDF] Demodulation of phase-modulated signals with small modulation index without digital noise limitation

M Yu, M Schewe, G Bauer, C Rembe - 2022 - scholar.archive.org
In many communication and sensor applications, receivers digitize phase-modulated carrier
signals directly by analog-to-digital converters. The obtained phase-modulated digital carrier …