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Dive into the research topics where Romain Dubrasquet is active.

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Featured researches published by Romain Dubrasquet.


Optics Letters | 2013

High-brightness fiber laser-pumped 68 fs-2.3 W Kerr-lens mode-locked Yb:CaF2 oscillator.

Guillaume Machinet; Pierre Sevillano; F. Guichard; Romain Dubrasquet; Patrice Camy; Jean-Louis Doualan; R. Moncorgé; Patrick Georges; Frédéric Druon; Dominique Descamps; Eric Cormier

By using a high-brightness fiber pump laser, we demonstrate a pure Kerr-lens mode-locked (ML) Yb:CaF(2) oscillator. The laser delivers 68 fs pulses with 2.3 W average power at 73 MHz repetition rate and an optical-to-optical efficiency of 33% is achieved. To the best of our knowledge, this is the first demonstration of Kerr-lens mode-locking in Yb:CaF(2). Incidentally, we report here the highest average power ever achieved for a sub-100-fs active Kerr-lens ML Yb-bulk oscillator.


Optics Letters | 2010

Millijoule-class Yb-doped pulsed fiber laser operating at 977 nm

Johan Boullet; Romain Dubrasquet; Capucine Médina; Ramatou Bello-Doua; Nicholas Traynor; Eric Cormier

We report what we believe to be the first millijoule-class ytterbium-doped fiber laser system operating on the zero-phonon line at 977 nm. An actively Q-switched master fiber oscillator delivers nanosecond pulses (FWHM 12-32 ns) at adjustable multiples of 10 kHz repetition rates that are further amplified in an ultralarge core photonic crystal fiber amplifier. At the highest available pumping level, a maximal average power of 78 W was obtained for 32 ns pulses at a repetition rate of 190 kHz, whereas the millijoule energy level was reached for 12 ns pulses at the lower repetition rate of 10 kHz.


Advanced Solid-State Lasers Congress (2013), paper AF3A.6 | 2013

Sub-50 fs, Kerr-lens mode-locked Yb:CaF2 laser oscillator delivering up to 2.7 W

Pierre Sevillano; Guillaume Machinet; Romain Dubrasquet; Patrice Camy; Jean-Louis Doualan; Richard Moncorge; Patrick Georges; Frédéric Druon; Dominique Descamps; Eric Cormier

By means of a high-brightness optical pumping scheme with a fiber laser, we demonstrate Kerr-lens mode locking (KLM) with an Yb:CaF2 laser crystal. Stable 48 fs pulses are produced at an average power of 2.7 W.


Lasers, Sources and Related Photonic Devices (2010), paper AWA5 | 2010

High Average Power, High Energy Fiber Laser System: Operation at 977 nm and Frequency Doubling at 488 nm

Johan Boullet; Romain Dubrasquet; Ramatou Bello-Doua; Nicholas Traynor; Eric Cormier

A pulsed fiber laser operating at 977 nm generating >0.75 mJ, 12 ns pulses at adjustable multi-10kHz of repetition rate is reported. Generation of 16 W of blue light by frequency conversion is also demonstrated.


Proceedings of SPIE | 2010

Yb-doped fiber laser system generating 12-ns 0.7-mJ pulses at 82 kHz at 977 nm

Johan Boullet; Romain Dubrasquet; Capucine Médina; Ramatou Bello-Doua; Nicholas Traynor; Eric Cormier

We demonstrate an Ytterbium-doped fiber laser system generating high energy pulses at the non-conventional wavelength of 977 nm. An actively Q-switched master fiber oscillator delivers 1.2 W of average power in 12 ns pulses at 82 kHz of repetition rate. This pulsed fiber source is then amplified in an ultra-large core photonic crystal fiber amplifier up to 71 W. Deducing the fraction of power contained in interpulse ASE, we obtained 0.7 mJ pulses at 977 nm, resulting in a pulse peak-power of >55 kW. To the best to our knowledge, this system delivers the highest performances ever demonstrated in this spectral window.


Lasers, Sources, and Related Photonic Devices (2012), paper AM4A.9 | 2012

Kerr lens mode-locking of Yb:CaF2

Guillaume Machinet; Florent Guichard; Romain Dubrasquet; Johan Boullet; Patrice Camy; Jean-Louis Doualan; Richard Moncorge; Sandrine Ricaud; Frédéric Druon; Patrick Georges; Dominique Descamps; Eric Cormier

Through high-brightness optical pumping with a fiber laser, we demonstrate a soft-aperture Kerr lens modelocked (KLM) operation in a Yb:CaF2 crystal. Stable 117 fs pulses are producing at an average power of 560 mW.


conference on lasers and electro optics | 2014

High-power sub-50 fs, Kerr-lens mode-locked Yb:CaF2 oscillator pumped by high-brightness fiber- laser

Pierre Sevillano; Guillaume Machinet; Romain Dubrasquet; Patrice Camy; Jean-Louis Doualan; R. Moncorgé; Patrick Georges; Frédéric Druon; Dominique Descamps; Eric Cormier

We investigated the influence of the spatial pump beam quality on the generation of ultra-short pulses in high-brightness Yb:fiber laser-pumped pure Kerr-lens mode-locked Yb:CaF2 oscillators. We report pulse duration as short as 48 fs with an average output power of 2.7 W.


Advanced Solid State Lasers (2014), paper AF1A.1 | 2014

Pumping Yb:doped Bulk Materials with 976-nm Fiber Lasers

Pierre Sevillano; Romain Dubrasquet; Jerome Lhermite; A. Pugžlys; Andrius Baltuska; Patrice Camy; R. Moncorgé; Patrick Georges; Frédéric Druon; Dominique Descamps; Eric Cormier

Advanced Solid State Lasers (ASSL)


Proceedings of SPIE | 2013

Single frequency, ultra-low noise, CW, 4W 488nm fiber laser

Romain Dubrasquet; Johan Boullet; S. Lugan; G. Mery; M. Castaing; Nicholas Traynor; Eric Cormier

We have recently developed an industrial laser platform emitting in the non-conventional range around 976 nm. This 15 W continuous wave spatially single mode linearly polarized fiber laser can be forced to work in narrow line width or single frequency configuration. Its frequency doubling at 488 nm can be used to replace argon gas laser technology in many applications. We have studied the second harmonic generation of our source to verify its suitability with several industrial application needs in terms of efficiency, temporal stability and noise level.


Advances in Optical Materials (2011), paper FThC5 | 2011

Visible and Infrared Sources based on Three-Level Ytterbium-doped Fiber Lasers

J. Boullet; Ramatou Bello-Doua; Romain Dubrasquet; Nicholas Traynor; Caroline Lecaplain; Ammar Hideur; Jérôme Lhermite; Guillaume Machinet; C. Médina; Eric Cormier

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Frédéric Druon

Centre national de la recherche scientifique

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Johan Boullet

Centre national de la recherche scientifique

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