Dollard-Des Ormeaux, Canada
Dollard-Des Ormeaux, Canada

Time filter

Source Type

Petkovsek R.,University of Ljubljana | Saby J.,EOlite Systems Inc. | Salin F.,EOlite Systems Inc. | Schumi T.,Vienna University of Technology | Bammer F.,Vienna University of Technology
Optics Express | Year: 2012

We demonstrate high-frequency Q-switching of a fiber rod laser with a Single-Crystal Photo-Elastic Modulator (SCPEM) made of a LiTaO 3-crystal. This type of photo-elastic modulator can be driven simultaneously with two different eigenmodes to achieve a shorter rise time, which is essential for high-power operation. When operated in the laser cavity, a pulse repetition frequency of 183.6 kHz with an average power of 47 W, a pulse duration of 26 ns, and a peak power of 10.5 kW was achieved. © 2012 Optical Society of America.


Benoit A.,University of Limoges | Benoit A.,EOlite Systems Inc. | Dauliat R.,Institute of Photonic Technology | Jamier R.,University of Limoges | And 5 more authors.
Optics Letters | Year: 2014

We report here on the first experimental demonstration, to the best of our knowledge, of a new generation of very large mode area (VLMA) fibers intended to strengthen single-mode propagation. The originality of this work relies on an aperiodicity of the inner cladding microstructuration exacerbating the spatial rejection of higher-order-modes (HOMs) while preserving a significant confinement of the fundamental mode. The single-mode behavior was demonstrated using an optical low-coherence interferometry measurement based on the group-velocity dispersion. As suggested through a preliminary numerical approach, this outstanding characteristic/behavior is evidenced over a large spectral range spanning from 1 to 2 μm for a core diameter of 60 μm. Core scalability was also investigated. © 2014 Optical Society of America.


Delen X.,University Paris - Sud | Deyra L.,University Paris - Sud | Benoit A.,EOlite Systems Inc. | Benoit A.,CNRS XLIM Research Institute, Limoges | And 7 more authors.
Optics Letters | Year: 2013

We report on a high-power narrow-linewidth pulsed laser source emitting at a wavelength of 257 nm. The system is based on a master oscillator power amplifier architecture, with Yb-doped fiber preamplifiers, a Yb:YAG single crystal fiber power amplifier used to overcome the Brillouin limitation in glass fiber and nonlinear frequency conversion stages. This particularly versatile architecture allows the generation of Fourier transform-limited 15 ns pulses at 1030 nm with 22 W of average power and a diffraction-limited beam (M2 < 1.1). At a repetition rate of 30 kHz, 106 μJ UV pulses are generated corresponding to an average power of 3.2 W. © 2013 Optical Society of America.


Pierrot S.,EOlite Systems Inc. | Pierrot S.,Aix - Marseille University | Salin F.,EOlite Systems Inc.
Optics Express | Year: 2013

We report on a new technique to produce high power sub-picosecond pulses from a fiber amplifier. We use parabolic pulse shaping of 27ps transform-limited pulses in order to control nonlinear effects in the fiber amplifier. 63MW, 780fs pulses with 25W average power were obtained, and ways to scale the technique to higher peak powers were identified. © 2013 Optical Society of America.


Laurila M.,Technical University of Denmark | Saby J.,EOlite Systems Inc. | Alkeskjold T.T.,NKT Photonics | Scolari L.,NKT Photonics | And 4 more authors.
Optics Express | Year: 2011

We demonstrate a Single-Mode (SM) Large-Mode-Area (LMA) ytterbium-doped PCF rod fiber laser with stable and close to diffraction limited beam quality with 110W output power. Distributed-Mode-Filtering (DMF) elements integrated in the cladding of the rod fiber provide a robust spatial mode with a Mode-Field-Diameter (MFD) of 59μm. We further demonstrate high pulse energy Second-Harmonic-Generation (SHG) and Third Harmonic Generation (THG) using a simple Q-switched single-stage rod fiber laser cavity architecture reaching pulse energies up to 1mJ at 515nm and 0.5mJ at 343nm. © 2011 Optical Society of America.


Coscelli E.,University of Parma | Poli F.,University of Parma | Alkeskjold T.T.,NKT Photonics A S | Salin F.,EOlite Systems Inc. | And 4 more authors.
Journal of Lightwave Technology | Year: 2012

Yb-doped double-cladding photonic crystal fibers have become key components for power scaling in fiber laser systems, by providing many advantages, especially an ultra large effective area. The single-mode regime, which is a mandatory requirement for high quality laser beams, can be obtained in such large core active fibers only through a careful design. In this paper the cut-off properties of 19-cell photonic crystal fibers have been thoroughly investigated with the avoided-crossing approach, in order to find guidelines for the design of single-mode fibers. The air-hole diameter and the core refractive index have been changed, as well as the number of air-hole rings in the fiber inner cladding. Simulation results have shown that, regardless of the air-hole ring number, the guided-mode cut-off properties are strongly influenced by the main design parameters, especially by the core refractive index. In particular, a wider single-mode wavelength range can be obtained in 19-cell fibers with small air-holes and low core refractive index. Moreover, double-cladding photonic crystal fibers with larger inner-cladding provide better guided-mode cut-off properties, which can have positive effects on the amplification process in practical applications. © 2012 IEEE.


Poli F.,University of Parma | Coscelli E.,University of Parma | Cucinotta A.,University of Parma | Selleri S.,University of Parma | Salin F.,EOlite Systems Inc.
IEEE Photonics Technology Letters | Year: 2014

Thermal effects are currently appointed as the main bottleneck to power scaling of fiber lasers. In this letter, the single-mode properties of Yb-doped rod-type photonic crystal fibers with reduced symmetry in the inner cladding under severe heat load have been analyzed. Three fibers with different cross-sectional geometry have been compared by calculating the single-mode regime and effective area with a full-vector modal solver based on the finite-element method, properly combined with a thermal model to include the effects of fiber heating on the guiding properties. Results have demonstrated that, with an optimized cross-sectional design, it is possible to obtain single-mode propagation for a coupled pump power up to 200 W, while keeping the effective area ~2400μm2. © 1989-2012 IEEE.


Pierrot S.,EOlite Systems Inc. | Saby J.,EOlite Systems Inc. | Cocquelin B.,EOlite Systems Inc. | Salin F.,EOlite Systems Inc.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

We have developed several high power picosecond sources using rod-type fiber systems. We will show that a very simple architecture can produce average power over 90 W @ 1030 nm, 57 W @ 515 nm and 20 W @ 343 nm, with pulse repetition rates ranging from 200 kHz to 80 MHz. Particular emphasis will be given on the control of non-linear effects in the fiber without relying on CPA. © 2011 SPIE.


Patent
EOlite Systems Inc. | Date: 2014-03-31

An apparatus includes a pulse conditioner and an amplifier. The pulse conditioner configured modifies a temporal intensity profile of an input laser pulse, thereby creating a conditioned laser pulse having conditioned temporal intensity profile with a misfit parameter, M, of less than 0.13, where: where |(t)|2 represents the pulse temporal intensity profile of the conditioned laser pulse and |Pfit(t)|2 represents a parabolic fit of the conditioned laser pulse. The amplifier increases the power of the conditioned laser pulse creating an amplified laser pulse. In a method a temporal intensity profile of an input laser pulse having a pulse duration of at least 1 ps is modified to create a conditioned laser pulse, which is amplified to create an amplified laser pulse, which is temporally compressed to generate a compressed laser pulse having a compressed pulse duration less than the input pulse duration.


The invention relates to an optical amplifier system for amplifying laser pulses, including a solid amplifying medium capable of receiving a beam of laser pulses to be amplified and generating a beam of amplified laser pulses, and a means of reducing the energy stored in said optical amplifying medium by means of optical pumping. According to the invention, said reducing means includes a continuous resonant cavity and a first optical separation means capable of sepaarating continuous resonant cavity into a common portion and a low arm, the common portion including an optical amplifying medium and the loss arm inlcuding an optical loss means, said optical separation means being capable of selectively directing a beam of pulses outside the optical path of said loss arm of the continuous resonant cavity, and of directing a continuous bean toward said loss arm of the continuous resonant cavity.

Loading EOlite Systems Inc. collaborators
Loading EOlite Systems Inc. collaborators