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Governing the speed of a light signal in optical fibers

Publications associées (466)

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105-ns Continuously Tunable Delay of 10-Gb/s Optical Signal

Camille Sophie Brès

A continuously tunable optical delay line providing over 105 ns of 10-Gb/s optical channel is reported using a two-pump parametric process in a nonlinear optical fiber. Performance limits are measured and compared with recently reported all-optical delay r ...

Institute of Electrical and Electronics Engineers2008

Phase sensitive Fourier domain optical coherence tomography

Theo Lasser, Rainer Leitgeb, Adrian Bachmann

Optical Coherence Tomography (OCT) is an imaging technique with high axial resolution in the micro-meter-scale range combined with a high sensitivity allowing for example to probe weakly back-scattering structures beneath the surface of biological t ...

2008

Nonlinear optical tuning of photonic crystal microcavities by near-field probe

Laurent Balet, Massimo Gurioli

We report on a nonlinear way to control and tune the dielectric environment of photonic crystal microcavities exploiting the local heating induced by near-field laser excitation at different excitation powers. The temperature gradient due to the optical ab ...

American Institute of Physics2008

Analysis of brillouin-based distributed fiber sensors using optical pulse coding

We propose the use of pulse Simplex-coding in distributed temperature sensors based on spontaneous Brillouin scattering. The analysis shows achieved performance improvement and the effect on stimulated Brillouin threshold, resulting in lower required input ...

2008

Distributed fiber sensing using Brillouin echoes

Luc Thévenaz, Stella Foaleng Mafang

A simple physical description of the nonlinear optical interaction based on Brillouin echoes is presented. This technique makes potentially possible distributed Brillouin sensing down to centimeter spatial resolution while preserving the narrowband feature ...

SPIE2008

Distributed fiber sensing using Brillouin echoes - art. no. 70043N

Luc Thévenaz, Stella Foaleng Mafang

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2008

30-km spontaneous-Brillouin distributed temperature sensor employing Simplex-coding and low optical input power

Marcelo Alfonso Soto Hernandez

In this work we have applied optical pulse-coding technique to spontaneous Brillouin-based distributed temperature sensor (BDTS) based on the Landau-Placzek ratio (LPR). We experimentally show that pulse-coding applied to optical time domain reflectometry ...

IEEE2008

Optical phase conjugation for turbidity suppression in biological samples

Demetri Psaltis

Elastic optical scattering, the dominant light-interaction process in biological tissues, prevents tissues from being transparent. Although scattering may appear stochastic, it is in fact deterministic in nature. We show that, despite experimental imperfec ...

2008

Er-Yb waveguide amplifiers in novel silicate glasses

Jana Jágerská

A set of novel silicate glasses containing ZnO and co-doped with Er3+ and Yb3+ was designed as substrates for optical waveguide amplifiers. Characterized by exceptionally low up-conversion, minimum Er concentration quenching and high mechanical as well as ...

Institute of Electrical and Electronics Engineers2008

Music Onset Detection Based on Resonator Time Frequency Image

Marco Mattavelli, Giorgio Zoia, Ruohua Zhou

This paper describes a new method for music onset detection. The novelty of the approach consists mainly of two elements: the time–frequency processing and the detection stages. The resonator time frequency image (RTFI) is the basic time–frequency analysis ...

2008