Publication
Distributed strain and temperature sensing over 50 km of SMF with 1 m spatial resolution employing BOTDA and optical pulse coding
Related publications (48)
Space-time wave packets with reduced divergence and tunable group velocity generated in free space after multi-mode fiber propagation
Tobias Kippenberg, Maxim Karpov, Hao Song, Xinzhou Su
Previously, space-time wave packets (STWPs) have been gen-erated in free space with reduced diffraction and a tunable group velocity by combining multiple frequency comb lines each carrying a single Bessel mode with a unique wave num-ber. It might be poten ...
Washington2023Enhanced Signal-Associated Noise in a φ-OTDR System
Luc Thévenaz, Malak Mohamed Hossameldeen Omar Mohamed Galal, Suneetha Sebastian
Owing to their high sensitivity with respect to external measurands, Rayleigh-based distributed optical fiber sensors (DOFS) find their way into applications in many industrial and academic sectors. To further transcend the limit of these sensors in terms ...
2022Distributed and dynamic strain sensing with high spatial resolution and large measurable strain range
Luc Thévenaz, Malak Mohamed Hossameldeen Omar Mohamed Galal, Zhisheng Yang, Li Zhang
A distributed and dynamic strain sensing system based on frequency-scanning phase-sensitive optical time domain reflectometry is proposed and demonstrated. By utilizing an RF pulse scheme with a fast arbitrary waveform generator, a train of optical pulses ...
2020Impact of optical noises on coded Brillouin optical time-domain analyzers
Luc Thévenaz, Zhisheng Yang, Sheng Wang, Jian Wu
The impact of optical noises on the performance of coded Brillouin optical time-domain analyzers is modelled and experimentally demonstrated. This enables quantitatively evaluating the actual coding gain at any point along the sensing fiber. ...
2020Demonstration of Multiple Kerr-Frequency-Comb Generation Using Different Lines From Another Kerr Comb Located Up To 50 km Away
Tobias Kippenberg, Maxim Karpov, Martin Hubert Peter Pfeiffer, Arne Kordts, Fatemeh Alishahi, Lin Zhang, Ahmad Fallahpour
On-chip Kerr frequency combs are potentially promising to enhance many applications because of their broad-band operation and chip-scale integration. Such combs offer various mutually coherent optical carriers that can potentially be used as both coherent ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2019High Signal-to-Noise Ratio Stimulated Brillouin Scattering Gain Spectrum Measurement
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang, Kenny Hey Tow, Flavien Gyger
A technique to measure nonlinear processes, such as stimulated Brillouin scattering, with a very-high signal-to-noise ratio (SNR) is presented. Brillouin gain measurement with 77dB SNR is demonstrated over a 2m-long section of single-mode fiber. ...
Optical Society of America2018Impact of the fiber coating on the temperature response of distributed optical fiber sensors at cryogenic ranges
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Xin Lu
The thermomechanical behavior of a standard single mode fiber with different coating materials is theoretically analyzed under different temperature conditions. Results show that the thermal expansion/shrinkage of the fiber coating introduces an extra stra ...
2018Optimizing Image Denoising for Long-Range Brillouin Distributed Fiber Sensing
Luc Thévenaz, Marcelo Alfonso Soto Hernandez
Linear and nonlinear two-dimensional image processing approaches are analyzed with the aim of removing noise from data acquired by distributed optical fiber sensors based on Brillouin optical time-domain analysis (BOTDA). The impact of the filter parameter ...
2018Beam shaping with tip-tilt varifocal mirror for indoor optical wireless communication
MEMS mirrors are currently used in many applications to steer beams of light. An area of continued research is developing mirrors with varifocal capability that allows the beam to be shaped and focused. In this work, we study the varifocal capability of a ...
Optical Society of America2017Microscopy and digital light shaping through optical fibers
Microscopy is an essential tool in medicine and biomedical research. Traditional microscopes rely on bulky optics, complicating their usage when studying live animal tissues. In addition, light cannot penetrate very far in most biological tissues due to sc ...
EPFL2017