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Marcelo Alfonso Soto Hernandez

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Related publications (104)

Page 2 of 6

Intensifying the response of distributed optical fibre sensors using 2D and 3D image restoration

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

Distributed optical fibre sensors possess the unique capability of measuring the spatial and temporal map of environmental quantities that can be of great interest for several field applications. Although existing methods for performance enhancement have e ...

Nature Publishing Group2016

Temperature-strain discrimination in distributed optical fiber sensing using phase-sensitive optical time-domain reflectometry

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Xin Lu

A method based on coherent Rayleigh scattering distinctly evaluating temperature and strain is proposed and experimentally demonstrated for distributed optical fiber sensing. Combining conventional phase-sensitive optical time-domain domain reflectometry ( ...

Optical Society of America2017

Analytical model and experimental verification of the critical power for modulation instability in optical fibers

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Mohammad Mehdi Alem Karladani

Modulation instability is thoroughly investigated and a simple analytical model for its power critically modifying the wave properties in terms of system parameters is derived and experimentally validated. The differences on the modulation instability gain ...

Optical Society of America2015

Long-range Brillouin optical time-domain analysis sensor employing pulse coding techniques

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

In this paper we describe and implement a long-range Brillouin optical time-domain analysis (BOTDA) sensor, for both temperature and strain measurements, using optical pulse coding techniques. A theoretical analysis of Simplex coding applied to BOTDA syste ...

IOP Publishing2010

Optimizing 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 ...

IEEE Institute of Electrical and Electronics Engineers2018

Hybrid Golay-coded Brillouin optical time-domain analysis based on differential pulses

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang

Different approaches to implement unipolar Golay coding in Brillouin optical time-domain analysis based on a differential pulse pair (DPP) are investigated. The analysis points out that dedicated post-processing procedures must be followed to secure the sh ...

2018

Bipolar pulse coding for enhanced performance in Brillouin distributed optical fiber sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

We propose and experimentally demonstrate the possibility to use a pump signal based on bipolar pulse sequences using single-sideband suppressed-carrier (SSB-SC) modulation in Brillouin optical time-domain analysis (BOTDA) sensors. The SSB-SC modulated pum ...

Spie-Int Soc Optical Engineering2012

Distributed phase birefringence measurements based on polarization correlation in phase-sensitive optical time-domain reflectometers

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Xin Lu

In this paper a technique to measure the distributed birefringence profile along optical fibers is proposed and experimentally validated. The method is based on the spectral correlation between two sets of orthogonally-polarized measurements acquired using ...

Optical Society of America2015

All-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 America2017

Genetic-optimised aperiodic code for distributed optical fibre sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang, Simon Adrien Zaslawski, Sheng Wang

Distributed optical fibre sensors deliver a map of a physical quantity along an optical fibre, providing a unique solution for health monitoring of targeted structures. Considerable developments over recent years have pushed conventional distributed sensor ...

Nature Research2020

Time gated phase-correlation distributed Brillouin fibre sensor

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Andrey Denisov

A random access distributed Brillouin fibre sensor is presented, based on phase modulation using a pseudo-random bit sequence (PRBS) together with time gating. The standard phase-correlation technique is known to show a noise level increasing linearly with ...

Spie-Int Soc Optical Engineering2013

Study on the signal-to-noise ratio of Brillouin optical-time domain analyzers

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang, Sheng Wang

The signal-to-noise ratio (SNR) of Brillouin optical time-domain analyzers (BOTDA) is modelled and experimentally validated, using direct detection with and without the use of optical pre-amplification. The behavior of SNR as a function of the Brillouin ga ...

2020

Power evolution along phase-sensitive parametric amplifiers: an experimental survey

Luc Thévenaz, Camille Sophie Brès, Marcelo Alfonso Soto Hernandez, Fatemeh Alishahi, Armand Vedadi-Comte, Andrey Denisov, Thi Minh Phuong Hoang

We propose and experimentally demonstrate a method based on Brillouin optical time-domain analysis to measure the longitudinal signal power distribution along phase-sensitive fiber-optical parametric amplifiers (PS-FOPAs). Experimental results show that th ...

Optical Soc Amer2014

Distributed strain and temperature sensing over 50 km of SMF with 1 m spatial resolution employing BOTDA and optical pulse coding

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

In this paper we demonstrate a long-range distributed strain and temperature optical fiber sensor using Brillouin optical time-domain analysis in conjunction with optical pulse coding. Compared to standard BOTDA, pulse coding provides higher signal-to-nois ...

SPIE2009

Increasing robustness of bipolar pulse coding in Brillouin distributed fiber sensors

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang

The robustness of bipolar pulse coding against pump depletion issues in Brillouin distributed fiber sensors is theoretically and experimentally investigated. The presented analysis points out that the effectiveness of bipolar coding in Brillouin sensing ca ...

Optical Society of America2016

MilliKelvin resolution in cryogenic temperature distributed fibre sensing based on coherent Rayleigh scattering

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Xin Lu

The response of a distributed temperature sensor based on coherent Rayleigh scattering is experimentally studied in the temperature range from 77 K up to 300 K, using fibres with standard and ORMOCER coating. A precise and absolute frequency scan is perfor ...

SPIE2014

Mitigation of modulation instability in Brillouin distributed fiber sensors by using orthogonal polarization pulses

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Mohammad Mehdi Alem Karladani

A technique based on the use of orthogonally-polarized pulses is proposed to mitigate the detrimental impact of modulation instability on Brillouin distributed fiber sensors. While the theoretical underpinnings of the method are described by introducing a ...

SPIE2015

Enhanced response in Brillouin distributed optical fibre sensors by simultaneous time and frequency pump multiplexing

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Li Zhang, Liang Zhang

A technique to enhance the response of Brillouin distributed sensors is proposed and experimentally validated. The method consists in creating a multi-frequency pump pulse interacting with a multi-frequency continuous-wave probe. The power of each pulse at ...

SPIE2014

Temperature sensitivity enhancement in a standard optical fiber with double coatings at low temperature

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Xin Lu

The thermomechanical behavior of a standard optical fiber with double coating is theoretically analyzed at room temperature and ~ 220 K. As the primary coating becomes stiffer at low temperature, the impact of the thermal expansion of the coatings is no lo ...

Ieee2017

Brillouin optical time-domain analysis over a 240 km-long fiber loop with no repeater

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Sang Hoon Chin

In this paper we combine the use of optical pulse coding and seeded second-order Raman amplification to extend the sensing distance of Brillouin optical time-domain analysis (BOTDA) sensors. Using 255-bit Simplex coding, the power levels of the Raman pumps ...

2012