Personne
Andrey Denisov
Cette personne n’est plus à l’EPFL
Publications associées (17)
Highly-sensitive distributed birefringence measurements based on a two-pulse interrogation of a dynamic Brillouin grating
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov
A method for distributed birefringence measurements is proposed based on the interference pattern generated by the interrogation of a dynamic Brillouin grating (DBG) using two short consecutive optical pulses. Compared to existing DBG interrogation techniq ...
Ieee2017All-optical flip-flops based on dynamic Brillouin gratings in fibers
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov
A method to generate an all-optical flip-flop is proposed and experimentally demonstrated based on dynamic Brillouin gratings (DBGs) in polarization maintaining fibers. In a fiber with sufficiently uniform birefringence, this flip-flop can provide extremel ...
Optical Society of America2017All-optical flip-flop based on dynamic Brillouin gratings
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov
One of the most essential building blocks in modem electronics is the flip-flop. A flip-flop operates bi-stably between two states, remaining at a given output level (high or low level) until a specific input control signal changes. For many years, photoni ...
IEEE2017Going beyond 1000000 resolved points in a Brillouin distributed fiber sensor: theoretical analysis and experimental demonstration
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov
Distributed fiber sensing possesses the unique ability to measure the distributed profile of an environmental quantity along many tens of kilometers with spatial resolutions in the meter or even centimeter scale. This feature enables distributed sensors to ...
Chinese Acad Sciences, Changchun Inst Optics Fine Mechanics And Physics2016Brillouin dynamic gratings in optical fibres for distributed sensing and advanced optical signal processing
This thesis presents results of a research on applications of Brillouin dynamic gratings - distributed reflectors that can be dynamically created in an optical fibre by two optical waves. A basic theory of stimulated Brillouin scattering (SBS) is introduce ...
EPFL2015Mapping the Uniformity of Optical Microwires Using Phase-Correlation Brillouin Distributed Measurements
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Kenny Hey Tow, Desmond Chow Ming Chia, Andrey Denisov, Joël Cabrel Tchahame Nougnihi
The distributed Brillouin gain profile of an ultrathin optical microwire made of chalcogenide-glass is characterized using a phase-modulated correlation-domain measurement technique. Method resolves variations of uniformity below 5% along a 13 cm-long micr ...
OSA2015Brillouin distributed fiber sensing at ultra-high spatial resolution
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov
Sophisticated techniques have been recently developed to achieve centimetric spatial resolution in distributed Brillouin fibre sensing, by-passing the slow response of this optoacoustic interaction by creating a localized stationary material vibration. Mor ...
IEEE2015Distributed Measurement of Signal Power Evolution in a Phase Sensitive Parametric Amplifier
Luc Thévenaz, Camille Sophie Brès, Marcelo Alfonso Soto Hernandez, Fatemeh Alishahi, Andrey Denisov
A method to measure the signal power evolution along phase-sensitive parametric amplifiers is proposed using Brillouin optical time-domain analysis. Different evolutions along the fiber are reported by varying input wave phases, including amplification and ...
OSA20141’000’000 resolved points along a Brillouin distributed fibre sensor
Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov
The challenge to resolve a record of one million points along a single optical fibre is demonstrated using a Brillouin distributed fibre sensor. The proposed system is based on a phase-correlation technique combined with a temporal pump gating, making poss ...
SPIE2014Effect of Dispersion Fluctuations on Longitudinal Gain Evolution in Phase-Sensitive Parametric Amplifiers
Luc Thévenaz, Camille Sophie Brès, Marcelo Alfonso Soto Hernandez, Fatemeh Alishahi, Mohammad Amin Shoaie, Andrey Denisov
A Brillouin probing method is proposed to extract the distribution of signal power along phase-sensitive parametric amplifiers. Operation near the zero-dispersion-wavelength shows enhanced sensitivity to dispersion fluctuations, allowing effective extracti ...
2014