France Telecom

Université Des Sciences Et Technologies De Lille

Marc Douay

Laurent Bigot

Geraud Pierre Bouwmans

Yves Quiquempois

Pascal Bernage

Pierre Niay

Mathias Perrin

Aurelie Betourne

Jean-Francedillaois Bayon

Karen Delplace

Antoine Le Rouge

The microstructured optical fibre comprises a core () surrounded by a sheath () comprising a base material having a refraction index (ni) and a plurality of at least two different types of inclusion: a first type of inclusion () having a refraction index n2 (n2&#x3e;n1), and a second type of inclusion () having a refraction index n3 (n3&#x3c;n1). The inclusions () are arranged and dimensioned in such a way as to ensure guidance, by total internal reflection (RTI), of a fundamental mode of the light, centred on a wavelength &#x3bb;, and of a fundamental mode of the light in the first photonic forbidden band (BG), centred on a wavelength &#x3bb;, which is different to that &#x3bb;of the fundamental mode guided by total internal reflection (RTI).

Hybrid microstructured optical fibre for guidance by means of photonic forbidden bands and by total internal reflection optimised for non-linear applications

A fiber-optic laser comprising a birefringent optic fiber possessing a Bragg grating at each of its ends,. A light source emits a light beam having two modes of polarization in the fiber. The birefringence of the fiber makes it possible to keep the two polarization modes separate. The two Bragg gratings are photo-recorded in the fiber and are made in such a way that their resonance wavelength is matched for one polarization. The wave emitted by the fiber is then polarized linearly along P1. Applications to linearly polarized lasers for optical transmission, instrumentation, spectroscopy, medicine, the detection of chemical species and telemetry.

Linearly polarized fiber-optic laser

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Lille, France

Marc Douay