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Fiber-Optic Distributed Sensor Based on Hybrid Raman and Brillouin Scattering Employing Multiwavelength Fabry–Pérot Lasers

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Doped sol-gel materials for the production of optical fibers

The sol-gel technology offers highly interesting prospects for fiber fabrication. The main advantage is the possibility to incorporate any dopants and co-dopants soluble in a suitable solvent. Generally, these dopants are homogeneously dissolved in the mat ...

EPFL2006

Arbitrary-bandwidth Brillouin slow light in optical fibers

Luc Thévenaz, Kwang-Yong Song

Brillouin slow light in optical fibers is a promising technique for the development of all-optical buffers to be used in optical routers. The main drawback of this technique up to now has been its narrow bandwidth, normally restricted to 35 MHz in conventi ...

2006

Review and Progress on Distributed Fibre Sensing

Luc Thévenaz

Optical fibers have crucially contributed to promote the concept of distributed sensing with a large impact. The different types of fiber optics distributed sensing techniques are reviewed and their performances and limits are presented. ...

Optical Society of America2006

Multi-hydrogenated compounds monitoring in optical fibre manufacturing process by photoacoustic spectroscopy

Luc Thévenaz, Jean-Philippe Besson

Sub-ppm hydrogen chloride (HCl) and water vapour (H2O) monitoring using photoacoustic spectroscopy in optical fibre manufacturing is reported. The development and performance of a sensor based on an acoustic resonant configuration is described, and on-site ...

Springer Verlag2006

Inelastic Strain Birefringence in Optical Fibers

René Salathé, Hans Georg Limberger, Florian Dürr

Retardation data captured by polarimetric stress-measurements in optical fibers have been reinterpreted in terms of both stress and inelastic strain. The linear dependence of strain birefringence on fiber drawing tension defines the Kohlrausch-Williams-Wat ...

2006

Inelastic strain birefringence in optical fibers

René Salathé, Hans Georg Limberger

Optical Soc America, 2010 Massachusetts Ave Nw, Washington, Dc 20036 Usa2006

Flexible Slow and Fast Light Using Tailored Brillouin Spectra in Optical Fibers

Luc Thévenaz, Sang Hoon Chin, Kwang-Yong Song

Stimulated Brillouin scattering makes possible the generation of synthesized gain spectra, so that innovative slow light schemes can be realized, ranging from broadband tunable delays to a zero-gain situation identical to an ideal electromagnetically-induc ...

OSA2006

Mapping of chromatic-dispersion distribution along optical fibers with 20-m spatial resolution

Luc Thévenaz, Kwang-Yong Song

The accurate mapping of chromatic-dispersion distribution along single-mode optical fibers with the best spatial resolution ever reported is experimentally demonstrated. The method consists of a new way of probing four-wave-mixing (FWM) efficiency along th ...

2005

Laser-induced stress changes in optical fibers

Florian Dürr

The precise determination of residual stress profiles in optical fibers allows drawing conclusions about radiation-induced density-changes of the fibers doped core glass. The corresponding index changes partially contribute to the phenomenon of photosensit ...

EPFL2005

Photosensitivity and bragg grating technology for upconversion all-fiber lasers

Marcel Zeller

Fiber lasers are compact lightsources with high intrinsic beam quality and high efficiency. The lasing spectrum ranges from the blue to the near infrared and is achievable using fibers with different dopants and glass compositions. All-fiber lasers are cha ...

EPFL2004