HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Coherent beam combining with an ultrafast multicore Yb-doped fiber amplifier

Patricia Ramirez 1 Marc Hanna 1 Géraud Bouwmans 2 Hicham El Hamzaoui 2 Mohamed Bouazaoui 2 Damien Labat 2 Karen Delplace 2 Julien Pouysegur 1, 3 Florent Guichard 3, 1 Philippe Rigaud 4 Vincent Kermène 4 Agnès Desfarges-Berthelemot 4 Alain Barthélémy 4 Florian Prévost 5 Laurent Lombard 5 Yoann Zaouter 3 Frédéric Druon 1 Patrick Georges 1
1 Laboratoire Charles Fabry / Lasers
LCF - Laboratoire Charles Fabry
2 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
3 Amplitude Systèmes
4 XLIM-PHOTONIQUE - PHOTONIQUE
XLIM - XLIM
5 ONERA - The French Aerospace Lab [Châtillon]
Abstract : Active coherent beam combination using a 7-non-coupled core, polarization maintaining, air-clad, Yb-doped fiber is demonstrated as a monolithic and compact power-scaling concept for ultrafast fiber lasers. A microlens array matched to the multicore fiber and an active phase controller composed of a spatial light modulator applying a stochastic parallel gradient descent algorithm are utilized to perform coherent combining in the tiled aperture geometry. The mitigation of nonlinear effects at a pulse energy of 8.9 μJ and duration of 860 fs is experimentally verified at a repetition rate of 100 kHz. The experimental combining efficiency results in a far field central lobe carrying 49% of the total power, compared to an ideal value of 76%. This efficiency is primarily limited by group delay differences between cores which is identified as the main drawback of the system. Minimizing these group delay issues, e.g. by using short and straight rod-type multicore fibers, should allow a practical power scaling solution for femtosecond fiber systems.
Document type :
Journal articles
Complete list of metadata

Cited literature [22 references]  Display  Hide  Download
https://hal-iogs.archives-ouvertes.fr/hal-01120367
Contributor : Marc Hanna Connect in order to contact the contributor
Submitted on : Friday, June 19, 2015 - 1:39:00 PM
Last modification on : Wednesday, March 23, 2022 - 3:50:54 PM
Long-term archiving on: : Tuesday, September 15, 2015 - 7:31:26 PM

File

Vignette du document
opex2015multicore.pdf
Files produced by the author(s)

Identifiers

Collections

IOGS | CNRS | UNILIM | PARISTECH | ONERA | XLIM | UNIV-PARIS-SACLAY | UNIV-LILLE | LCFIO | PHLAM | GS-ENGINEERING | INSTITUT-SCIENCES-LUMIERE

Citation

Patricia Ramirez, Marc Hanna, Géraud Bouwmans, Hicham El Hamzaoui, Mohamed Bouazaoui, et al.. Coherent beam combining with an ultrafast multicore Yb-doped fiber amplifier. Optics Express, Optical Society of America - OSA Publishing, 2015, 23 (5), pp.5406-5416. ⟨10.1364/OE.23.005406⟩. ⟨hal-01120367⟩

Export

BibTeX TEI DC DCterms EndNote Datacite

Share

Metrics

Record views

805

Files downloads

345