Lannion, France
Lannion, France

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Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP-2008-4.0-4 | Award Amount: 15.74M | Year: 2009

The LIFT project will establish international leadership for Europe in the science, application and production technologies for material processing by fibre lasers through the development of innovative laser sources. Major advances beyond the state of the art are planned: The cold-ablation fibre laser, based on ultra-short pulses, will open an entirely new market (100 mill. p.a.) for laser processing of ceramics. The extreme high-power fibre laser will enlarge the EUV lithography market (500 mill. p.a.) to include fibre lasers. The visible RGB fibre laser will produce the first high-brilliance source for laser projection displays (15 mill. p.a.). New future-oriented manufacturing tools based on higher-power pulsed fibre lasers (80 mill. p.a.). The high-reliability laser for large-scale manufacturing with High Speed Laser Remote Processing - means a new level of performance for 2kWatt materials-processing lasers with raised MTBF to 50.000 hours (accessible market 1 bill. p.a.). The Horizontal integration and networking in Europes high brilliance laser industry in this project will enable a greater market share for existing applications, create new areas of exploitation for manufacturing, and build a European network of component suppliers, laser manufacturers, universities and research institutes. As a result, LIFT will cause the following results to emerge: 1. Europe would take advantage of novel laser sources to be employed for various processing applications, many of which cannot even be treated by todays lasers. 2. European companies will benefit by the exploitation of the knowledge by the LIFT consortium in the field of fibre lasers, thus creating new markets and improving productivity in existing ones, thus building the competitiveness and the technological role of Europe; 3. The society as a whole would benefit from the results of LIFT, because in many sectors the further development of laser processing is crucial for the improvement of the quality

Kneis C.,French German Research Institute of Saint Louis | Kneis C.,French Atomic Energy Commission | Donelan B.,French German Research Institute of Saint Louis | Berrou A.,French German Research Institute of Saint Louis | And 5 more authors.
Optics Letters | Year: 2015

A diode-pumped, actively mode-locked high-power thulium (Tm3+)-doped double-clad silica fiber laser is demonstrated, providing an average output power in mode-locked (continuous wave) operation of 53W(72 W) with a slope efficiency of 34% (38%). Mode-locking in the 6th-harmonic order was obtained by an acousto-optic modulator driven at 66 MHz without dispersion compensation. The shortest measured output pulse width was 200 ps. Owing to a diffraction grating as cavity end mirror, the central wavelength could be tuned from 1.95 to 2.13 μm. The measured beam quality in mode-locked and continuous wave operation has been close to the diffraction limit. © 2015 Optical Society of America.

Kieleck C.,French German Research Institute of Saint Louis | Berrou A.,French German Research Institute of Saint Louis | Donelan B.,French German Research Institute of Saint Louis | Cadier B.,IXfiber | And 2 more authors.
Optics Letters | Year: 2015

An efficient actively Q-switched Tm3+-doped single-oscillator fiber laser based on a silica polarization-maintaining (PM) double-clad fiber provided average powers of 23 W at pulse widths of 65 ns at 40 kHz pulse repetition frequency. It was used to directly pump a ZnGeP2optical parametric oscillator (OPO). Up to 6.5 W were generated in mid-IR wavelength range. © 2015 Optical Society of America.

Agency: European Commission | Branch: FP7 | Program: CP | Phase: ICT-2011.3.5 | Award Amount: 3.63M | Year: 2011

The project CHARMING aims at developing compact and fully fibred visible lasers for fluorescencespectroscopy, high resolution confocal microscopy and tryptophan imaging. These applications requirepulsed operation (about 100 ps at repetition rates from 1 to 80 MHz), various wavelengths in the visible(from 515 to 630 nm typically) and in the UV (for tryptophan imaging), high average power (up to 500 mW for high resolution) with a polarisation maintaining fibre delivery when possible.These wavelengths cannot, in most of the cases, be addressed directly. Therefore, in order to respond tothese applications with fibre based solutions different technological building blocks have to be developed.The project CHARMING will focus on the development of semiconductor laser sources in the 1.1 m to1.2 m band, Bismuth and Raman amplifiers, pulse gating and wavelength conversion fibre basedsolutions. This last function is certainly the more challenging in the project.Periodically Poled Singlemode Fibres (PPSF) for Second Harmonic Generation (SHG) have beenproven at laboratory scale but breakthrough approaches are required for this technology to be integrated in future systems. Various innovative approaches, in particular the use of Micro-structured Optical Fibres (MOF), will be investigated to convert this promising technology into potential products.SHG and other functions developed in CHARMING will be integrated in gain-switched and modelockedlasers at different wavelengths in the visible. The compatibility of these sources with the requirements of the imaging applications targeted in the project will be demonstrated.Finally, the performances of the devices will be pushed beyond these specifications (in the Watt level)for targeting a broader potential impact (like for instance, applications in micromachining).

Girard S.,CNRS Hubert Curien Laboratory | Laurent A.,IXFiber | Pinsard E.,IXFiber | Robin T.,IXFiber | And 5 more authors.
Optics Letters | Year: 2014

We present a new structure for erbium-doped optical fibers [hole-assisted carbon-coated, (HACC)] that, combined with an appropriate choice of codopants in the core, strongly enhances their radiation tolerance. We built an erbiumdoped fiber amplifier based on this HACC fiber and characterize its degradation under γ-ray doses up to 315 krad (SiO2) in the ON mode. The 31 dB amplifier is practically radiation insensitive, with a gain change of merely ?2.2 × 10?3 dB?krad. These performances authorize the use of HACC doped fibers and amplifiers for various applications in environments associated with today's missions (of doses up to 50 krad) and even for future space missions associated with higher dose constraints. © 2014 Optical Society of America.

A method of manufacturing a radiation-resistant optical fiber and a thus-obtained radiation-resistant optical fiber, the method includes the following steps:

Bartolacci C.,CNRS Center for Research on Ions, Materials and Photonics | Laroche M.,CNRS Center for Research on Ions, Materials and Photonics | HerveGilles,CNRS Center for Research on Ions, Materials and Photonics | Girard S.,CNRS Center for Research on Ions, Materials and Photonics | And 2 more authors.
Optics Express | Year: 2010

We demonstrate 308 mW of single-mode laser emission at 464 nm from a frequency doubled picosecond fiber based Master Oscillator Power Amplifier (MOPA). The laser system consisted of a gain-switched and spectrally narrowed Fabry-Perot laser diode emitting at 928 nm, which was amplified in a two-stage amplifier based on W-type double-clad Nddoped fibers. Output pulses with a duration of 90 ps at a repetition rate of 41 MHz were frequency-doubled in a periodically poled MgO-doped Congruent Lithium Niobáte. A conversion efficiency of 14.8% was achieved in single-pass configuration. ©2009 Optical Society of America.

Laroche M.,CNRS Center for Research on Ions, Materials and Photonics | Cadier B.,IXFIBER | Gilles H.,CNRS Center for Research on Ions, Materials and Photonics | Girard S.,CNRS Center for Research on Ions, Materials and Photonics | And 2 more authors.
Optics Letters | Year: 2013

We demonstrate a double-clad fiber laser operating at 910 nm with a record power of 20 W. Laser emission on the three-level scheme is enabled by the combination of a small inner cladding-to-core diameter ratio and a high brightness pump source at 808 nm. A laser conversion efficiency as high as 44% was achieved in CW operating regime by using resonant fiber Bragg reflectors at 910 nm that prevent the lasing at the 1060 nm competing wavelength. Furthermore, in a master oscillator power-amplifier scheme, an amplified power of 14.8 W was achieved at 914 nm in the same fiber. © 2013 Optical Society of America.

Delepine-Lesoille S.,Andra Inc | Bertrand J.,Andra Inc | Lablonde L.,IXFiber | Pheron X.,Andra Inc
IEEE Photonics Technology Letters | Year: 2012

We report on the design and test of a truly distributed hydrogen sensor based on Brillouin scattering into single-mode G652 optical fibers. The proposed system enables remote, robust, long-term, and truly distributed hydrogen sensing into long-range structures, such as radioactive waste repositories, with a spatial resolution in the order of 2 m over several hundred meters. For the first time, we demonstrate that Brillouin frequency shift depends on hydrogen concentration in the silica core with a rate of approximately 0.21 MHz%H 2. Influence parameters are discussed. We showed that temperature influence may be corrected with a collocated carbon-coated fiber. © 1989-2012 IEEE.

A radiation-resistant optical fiber includes at least one core and at least one first cladding surrounding the core. The core includes a phosphosilicate matrix, the core being rare-earth doped, the rare earth being chosen from erbium, ytterbium, neodymium, thulium or erbium-ytterbium of thulium-holmium codoped and the core is cerium codoped. Also described is a method for radiation-hardening an optical fiber including the core having a phosphosilicate matrix, the core being rare-earth doped, the rare earth being chosen from erbium, ytterbium, neodymium and thulium, or erbium-ytterbium or thulium-holmium codoped, and including a step of cerium codoping the core of the fiber.

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