Publication

Increasing robustness of bipolar pulse coding in Brillouin distributed fiber sensors

Publications associées (30)

Going 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 Physics2016

Novel scanning method for distortion-free BOTDA measurements

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang, Alejandro Dominguez Lopez

Systematic errors induced by distortions in the pump pulse of conventional Brillouin distributed fiber sensors are thoroughly investigated. Experimental results, supported by a theoretical analysis, demonstrate that the two probe sidebands in standard Bril ...

Optical Society of America2016

Sub-metric spatial resolution over an extended range using differential time-domain Brillouin sensing

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Alejandro Dominguez Lopez

This paper reports on a distributed fiber sensing scheme to achieve sub-metric spatial resolution and long sensing ranges based on a differential pulse-width pair (DPP) Brillouin sensor. The scheme uses a scanning method in which the spectral separation be ...

Spie-Int Soc Optical Engineering2016

Coherent Rayleigh time domain reflectometry : novel applications for optical fibre sensing

Xin Lu

Owing to the advantages of the optical fibre, such as lightweight, small size, low cost and immunity to electromagnetic interferences, the fibre sensors have been applied in diverse fields and the scientific research on fibre sensing keeps improving to mee ...

EPFL2016

A Time-Based, Digitally Intensive Circuit and System Architecture for Wireless Neural Recording with High Dynamic Range

Alexandre Schmid, Wen-Yang Hsu, Chen Cao

A new type of wireless neural recording front-end with PWM modulation and VCO-based ADC is proposed. The target signal is first encoded into binary levels with varying pulse width by PWM modulation, which intrinsically has much higher dynamic range compare ...

2016

Versatile High Repetition Rate 2-μm Pulsed Source Based on Wideband Parametric Conversion

Camille Sophie Brès, Adrien Billat, Steevy Joyce Cordette

We report an all-fiber pulsed source based on parametric conversion followed by thulium amplification able to deliver picosecond pulses at a repetition rate selectable between 2 and 5 GHz, of which central wavelength can be freely selected in the 2-μm regi ...

IEEE Institute of Electrical and Electronics Engineers2016

200 km fiber-loop Brillouin distributed fiber sensor using bipolar Golay codes and a three-tone probe

Luc Thévenaz, Marcelo Alfonso Soto Hernandez, Zhisheng Yang

Aiming at taking full advantage of bipolar codes, a method using a three-tone probe is proposed to alleviate the probe power limitation imposed by pump depletion in Golay-coded Brillouin distributed fiber sensors. Experimental results validate the techniqu ...

SPIE2015

Brillouin dynamic gratings in optical fibres for distributed sensing and advanced optical signal processing

Andrey Denisov

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 ...

EPFL2015

Versatile high repetition rate 2 micron pulsed source based on wideband parametric conversion

Camille Sophie Brès, Adrien Billat, Steevy Joyce Cordette

IEEE Institute of Electrical and Electronics Engineers2016

Towards 1’000’000 resolved points in a distributed optical fibre sensor

Luc Thévenaz, Marcelo Alfonso Soto Hernandez

Increasing the number of resolved points, by either improving the spatial resolution or extending the measurement range, is one of the main challenges being currently faced in distributed optical fibre sensing. This paper explores the main parameters affec ...

SPIE2014