Dr. Cedric Maunier Profile

Dr. Cedric Maunier

at CEA-Cesta

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Author

Publications (15)

Proceedings Article | 20 June 2024 Presentation + Paper

Nd3+ and Yb3+ simultaneous laser operation coupled by energy transfer in Nd3+,Yb3+,Gd3+:CaF2 crystals

Simone Normani, Cesare Meroni, Cédric Maunier, Sébastien Montant, Patrice Camy, Alain Braud

Proceedings Volume 13003, 130030V (2024) https://doi.org/10.1117/12.3017092

KEYWORDS: Neodymium, Ytterbium, Ions, Crystals, Energy transfer, Emission wavelengths, Absorption, Electromagnetic coupling, Gadolinium, Fluorine

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Co-doped laser materials with two active ions coupled by energy transfer is an interesting case where both ions can take part in the laser output intensity. Depending on the concentration of both co-dopants, the strength of the energy transfer coupling them or even the pumping rate, a competition between the two ions can take place which will affect the laser characteristics such as the laser wavelength. This competition between two emitting ions is illustrated here in the case of CaF₂ co-doped with neodymium and ytterbium ions. The advantage of Nd³⁺ is that its absorption cross-section around 791nm is higher than that of Yb³⁺ at ~980nm, enabling an efficient excitation of Yb³⁺ by pumping Nd³⁺ with a subsequent Nd³⁺-to-Yb³⁺ energy transfer (ET). Combining Nd³⁺ and Yb³⁺ with Gd³⁺ buffer ions further enables breaking up opticallyquenched Nd3+ clusters. Nd³⁺,Yb³⁺,Gd³⁺:CaF₂ crystals exhibit broadband emission, extending the Yb³⁺ spectrum via the Nd³⁺ contribution at longer wavelengths. Before addressing the laser gain competition between Nd³⁺ and Yb³⁺ ions, the Nd³⁺⟶Yb³⁺ ET efficiency was estimated using two approaches based on luminescence intensity and lifetimes, showing its dependency on Yb³⁺ doping. We achieved an ET efficiency of 80% in 0.5%Nd,3%Yb,2%Gd:CaF₂. CW laser action using different Nd,Yb,Gd:CaF₂ crystals resulted in a 17% slope efficiency versus absorbed pump power and a 200mW laser threshold. The expected laser gain competition between Nd³⁺ and Yb³⁺ ions leads to a change of the laser wavelength within the 1045-1067nm range depending on the Yb³⁺ concentration and output coupler transmission. These results are clearly explained by investigating the respective contribution of Nd³⁺ and Yb³⁺ to the gain cross-section and its dependence on Yb³⁺ doping concentration and Nd3+ population inversion. The gain cross-section profile is either dominated by one of the Nd³⁺ emission peaks (1065nm, 1048nm), or flat across 1045-1067nm, in which case the laser oscillates randomly within this spectral range. We show how a large Nd3+ inversion ratio leads to depletion of the Yb³⁺ 2F7/2 ground state through ET, resulting in two main effects: the saturation of the ET, as the ground-state Yb³⁺ acceptor concentration diminishes, and a shift of the laser line towards shorter wavelengths, due to weaker Yb³⁺ reabsorption.

Proceedings Article | 25 May 2022 Paper

Laser gain characterization and CW laser operation in Nd:CaF2 co-doped with Gd3+ and Y3+ buffer ions

Cesare Meroni, Alain Braud, Jean-Louis Doualan, Sébastien Montant, Cedric Maunier, Patrice Camy

Proceedings Volume 12142, 121420H (2022) https://doi.org/10.1117/12.2621481

KEYWORDS: Crystals, Laser crystals, Ions, Luminescence, Continuous wave operation, Neodymium, Gadolinium, Yttrium, Output couplers, Spectroscopy

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Proceedings Article | 15 November 2019 Paper

A method to discriminate between upper and lower side material removal in double-side polishing

C. Maunier, M. Redien, B. Da Costa Fernandes, J. Neauport

Proceedings Volume 11175, 1117506 (2019) https://doi.org/10.1117/12.2536771

KEYWORDS: Polishing, Surface finishing, Optical components, High power lasers, Optics manufacturing, Manufacturing, Silica, Laser engraving, Carbon dioxide lasers

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Proceedings Article | 16 October 2017 Paper

Impact of slurry pH on material removal rate and surface quality of polished fused silica

Melanie Redien, Cedric Maunier, Bertrand Remy, Karine Poliakoff-Leriche, Jerome Neauport

Proceedings Volume 10448, 104480F (2017) https://doi.org/10.1117/12.2279798

KEYWORDS: Surface finishing, Polishing, Silica, Cerium, Oxides, High power lasers, Abrasives, Optics manufacturing

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Proceedings Article | 11 October 2015 Paper

Comparison of various colloidal silica slurries and process parameters for fused silica finishing

S. Campaignolle, C. Maunier, J. Neauport

Proceedings Volume 9633, 963308 (2015) https://doi.org/10.1117/12.2195724

KEYWORDS: Silica, Surface finishing, Particles, Optical components, Manufacturing, Chemical mechanical planarization, Abrasives, Optics manufacturing, Silicon, Error analysis

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SPIE Journal Paper | 22 May 2014

Magnetorheological finishing for removing surface and subsurface defects of fused silica optics

Rodolphe Catrin, Jerome Neauport, Daniel Taroux, Philippe Cormont, Cedric Maunier, Sebastien Lambert

OE, Vol. 53, Issue 09, 092010, (May 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.9.092010

KEYWORDS: Magnetorheological finishing, Polishing, Surface finishing, Silica, Interfaces, Iron, Cerium, Glasses, Contamination, Optics manufacturing

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Proceedings Article | 14 November 2013 Paper

MRF, ELSM and STED: tools to study defects in fused silica optics

R. Catrin, D. Taroux, P. Cormont, C. Maunier, J. Neauport

Proceedings Volume 8885, 88852D (2013) https://doi.org/10.1117/12.2030420

KEYWORDS: Stimulated emission depletion microscopy, Silica, Confocal microscopy, Surface finishing, Magnetorheological finishing, Polishing, Optics manufacturing, Laser induced damage, Luminescence, Particles

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Proceedings Article | 15 October 2013 Paper

Efficiency of magnetorheological fluid finishing on the elimination of defects in fused silica optics

R. Catrin, D. Taroux, P. Cormont, C. Maunier, T. Corbineau, G. Razé, J. Néauport

Proceedings Volume 8884, 88840A (2013) https://doi.org/10.1117/12.2029388

KEYWORDS: Magnetorheological finishing, Surface finishing, Polishing, Silica, Ultraviolet radiation, Laser induced damage, Frequency conversion, Crystals, Crystal optics, Optical components

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Proceedings Article | 18 February 2013 Paper

Update of Laser Mégajoule large optics wavefront performance requirements

Stéphane Mainguy, Jean-Philippe Airiau, Thierry Bart, Vincent Beau, Edouard Bordenave, Stéphane Bouillet, Christian Chappuis, Sandrine Chico, Philippe Cormont, Nathalie Darbois, Jérome Daurios, Vincent Denis, Laure Eupherte, Nathalie Ferriou-Darbois, Servane Fontaine, Gaël Gaborit, Claire Grosset-Grange, Eric Journot, Laurent Lamaignère, Thomas Lanternier, Eric Lavastre, Christophe Leymarié, Louis-André Lompré, Mélanie Mangeant, Cédric Maunier, Jérome Néauport, Etienne Perrot-Minnot, Gérard Razé, Stéphane Reyné, Claude Rouyer, Jean-Michel Sajer, Stéphane Seznec, Daniel Taroux, Sébastien Vermersch, Laurent Le Déroff

Proceedings Volume 8602, 86020G (2013) https://doi.org/10.1117/12.2004148

KEYWORDS: Wavefronts, Wave propagation, Optical components, Optical amplifiers, Laser optics, Mirrors, Numerical simulations, Spatial filters, Crystals, Near field optics

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Proceedings Article | 28 November 2011 Paper

Carrier dynamics in KDP and DKDP crystals illuminated by intense femtosecond laser pulses

G. Duchateau, G. Geoffroy, C. Maunier, A. Dyan, H. Piombini, S. Guizard

Proceedings Volume 8190, 819024 (2011) https://doi.org/10.1117/12.898979

KEYWORDS: Electrons, Crystals, Phase shifts, Picosecond phenomena, Absorption, Laser crystals, Femtosecond phenomena, Data modeling, Laser induced damage, Hydrogen

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Proceedings Article | 23 November 2011 Paper

Self-laser conditioning of KDP and DKDP crystals

C. Maunier, M. Balas, T. Donval, L. Lamaignère, G. Duchateau, G. Mennerat

Proceedings Volume 8190, 819018 (2011) https://doi.org/10.1117/12.899184

KEYWORDS: Laser induced damage, Crystals, Resistance, High power lasers, Second-harmonic generation, Laser crystals, Frequency converters, Bulk lasers, Diffraction, Frequency conversion

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Proceedings Article | 2 December 2010 Paper

Effects of thermal annealing on KDP and DKDP on laser damage resistance at 3w

François Guillet, Bertrand Bertussi, Laurent Lamaignère, Cédric Maunier

Proceedings Volume 7842, 78421T (2010) https://doi.org/10.1117/12.868269

KEYWORDS: Annealing, Resistance, Laser induced damage, Thermal effects, Crystals, Crystal optics, Thermography, Diffraction, Laser crystals, Second-harmonic generation

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Proceedings Article | 30 December 2008 Paper

Effect of thermal annealing on laser damage resistance of KDP at 3ω

François Guillet, Bertrand Bertussi, David Damiani, Laurent Lamaignère, Audrey Surmin, K. Vallé, Cédric Maunier

Proceedings Volume 7132, 713211 (2008) https://doi.org/10.1117/12.804297

KEYWORDS: Annealing, Resistance, Laser induced damage, Thermal effects, Crystals, Second-harmonic generation, Pulsed laser operation, Laser crystals, Crystal optics, Laser optics

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Proceedings Article | 18 December 2007 Paper

Comparison of ns and sub-ns laser conditioning of KDP and DKDP crystals for high-power lasers

C. Maunier, B. Bertussi, D. Damiani, T. Donval, G. Duchateau, A. Dyan, G. Gaborit, L. Lamaignère, X. Leborgne, M. Loiseau, H. Mathis, G. Raze

Proceedings Volume 6720, 67201L (2007) https://doi.org/10.1117/12.752826

KEYWORDS: Second-harmonic generation, Laser induced damage, Picosecond phenomena, Crystals, Laser crystals, High power lasers, Phase modulation, Laser scattering, Frequency converters, Scattering

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Proceedings Article | 20 October 2005 Paper

Megajoule laser project and polishing processes for high laser induced damage threshold at 351 nm

J. Néauport, P. Cormont, N. Darbois, A. During, N. Ferriou, E. Lavastre, I. Legoff, D. Leschuitta, C. Maunier, C. Pellegrini, D. Taroux, D. Valla

Proceedings Volume 5965, 59650N (2005) https://doi.org/10.1117/12.633499

KEYWORDS: Silica, Polishing, Optics manufacturing, Laser induced damage, Laser damage threshold, Laser processing, Mirrors, Ultraviolet radiation, Crystals, Manufacturing

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Showing 5 of 15 publications

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