Concept

Fibre à cristal photonique

Publications associées (265)

High-resolution Brillouin fiber sensing using random phase coding of the pump and probe waves

Distributed temperature measurements with 1.2 cm resolution based on stimulated Brillouin scattering (SBS) in standard fibers are reported. High resolution is achieved by phase-coding both pump and probe waves with a high-rate, pseudo-random binary phase c ...

Society of Photo-Optical Instrumentation Engineers (SPIE)2012

Stress changes in H2-loaded SMF optical fibers induced by cw-Ar+ 244 nm irradiation

Hans Georg Limberger, Georgios Violakis, Nandita Aggarwal

Bragg gratings were inscribed in H2-loaded SMF-28e optical fibers and measured for axial stress changes for various exposure doses. Mean refractive index changes as high as 7.5 × 10-3 were observed under cw-244 nm irradiation of 143 W/cm2. Bragg grating re ...

Optical Soc Amer2012

Real-time, in vivo measurement of tissular pO(2) through the delayed fluorescence of endogenous protoporphyrin IX during photodynamic therapy

Hubert van den Bergh, Georges Wagnières, Anna Maria Novello, Patrycja Nowak-Sliwinska, Filippo Piffaretti, Cédric Xavier Paulou

Tissular oxygen concentration plays a key role during photodynamic therapy (PDT). Therefore, monitoring its local oxygen partial pressure (pO(2)) may help predict and/or control the outcome of a PDT treatment. The first real-time, in vivo measurements of t ...

Spie-Soc Photo-Optical Instrumentation Engineers2012

1 Mbps coherent one-way QKD with dense wavelength division multiplexing and hardware key distillation

Andreas Peter Burg, Jeremy Hugues-Felix Constantin, Nicolas Gisin

We present the latest results obtained with a quantum cryptography prototype based on a coherent-one way quantum key distribution (QKD) scheme. To support its continuous high rate secret key generation we developed different low-noise single photon detecto ...

2012

Strong fiber Bragg gratings in Bi-Al co-doped H2-loaded optical fibers using CW-Ar+ laser

Hans Georg Limberger, Georgios Violakis

Bragg gratings with reflectivity > 93% were fabricated in Bi-Al co-doped H-2-loaded optical fibers. Average index changes as high as +2.5x10(-3) were obtained. Positive core stress changes indicate a compaction contribution to the total index change. ...

Optical Soc America, 2010 Massachusetts Ave Nw, Washington, Dc 20036 Usa2011

Jean-Daniel Colladon symposium "milestones in light guiding"

Hans Georg Limberger

The Colladon symposium is a public event that will honor the physicist Jean-Daniel Colladon (1802-1890). He was a scientist born in Geneva and well known for his measurements of the speed of sound in the lake of Geneva, his development of tunnel drilling m ...

2011

Advanced Fiber Optics: Concepts and Technology

Luc Thévenaz

Few technologies have had as much impact on society as fiber optics. These tiny hair-sized glass wires have deeply transformed the way we access information, our modes of communication and even the behavior of consumers. Today, optical fibers are omniprese ...

EPFL Press, distributed by CRC Press2011

Dispersion Properties of Photonic Crystals and Silicon Nanostructures Investigated by Fourier-Space Imaging

Jana Jágerská

State-of-the-art nanophotonic devices based on semiconductor technology use total internal reflection or the photonic bandgap effect to reduce the waveguide core dimensions down to hundreds of nanometers, ensuring strong optical confinement within the scal ...

EPFL2011

Tuning optical modes in slab photonic crystal by atomic layer deposition and laser-assisted oxidation

Laurent Balet

The authors experimentally investigate the effects of atomic layer deposition (ALD) and laser-assisted oxidation on the optical modes in GaAs L3 photonic crystal air-bridge cavities, using layers of InAs quantum dots as internal light source. Four distinct ...

2011

Brillouin Echoes for Advanced Distributed Sensing in Optical Fibres

Stella Foaleng Mafang

Brillouin scattering is particularly efficient and attractive for the implementation of strain and temperature distributed sensing in optical fibres. Recently a trend has been observed that modern advanced applications require a substantial step towards be ...

EPFL2011

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