Title :

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

Author(s) :

Ramirez, Patricia [Auteur]
Laboratoire Charles Fabry / Lasers
Hanna, Marc [Auteur]
Laboratoire Charles Fabry / Lasers
Bouwmans, Géraud [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
El Hamzaoui, Hicham [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Bouazaoui, Mohamed [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Labat, Damien [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Delplace, Karen [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Pouysegur, Julien [Auteur]
Amplitude Systèmes
Laboratoire Charles Fabry / Lasers
Guichard, Florent [Auteur]
Laboratoire Charles Fabry / Lasers
Amplitude Systèmes
Rigaud, Philippe [Auteur]
PHOTONIQUE [XLIM-PHOTONIQUE]
Kermène, Vincent [Auteur]
PHOTONIQUE [XLIM-PHOTONIQUE]
Desfarges-Berthelemot, Agnès [Auteur]
PHOTONIQUE [XLIM-PHOTONIQUE]
Barthélémy, Alain [Auteur]
PHOTONIQUE [XLIM-PHOTONIQUE]
Prévost, Florian [Auteur]
ONERA - The French Aerospace Lab [Châtillon]
Lombard, Laurent [Auteur]
ONERA - The French Aerospace Lab [Châtillon]
Zaouter, Yoann [Auteur]
Amplitude Systèmes
Druon, Frédéric [Auteur]
Laboratoire Charles Fabry / Lasers
Georges, Patrick [Auteur]
Laboratoire Charles Fabry / Lasers

Journal title :

Optics Express

Pages :

5406-5416

Publisher :

Optical Society of America - OSA Publishing

Publication date :

2015-02-23

ISSN :

1094-4087

HAL domain(s) :

Physique [physics]/Physique [physics]/Optique [physics.optics]

English abstract : [en]

Active coherent beam combination using a 7-non-coupled core,polarization maintaining, air-clad, Yb-doped fiber is demonstrated as amonolithic and compact power-scaling concept for ultrafast fiber lasers. Amicrolens array ...
Show more >Active coherent beam combination using a 7-non-coupled core,polarization maintaining, air-clad, Yb-doped fiber is demonstrated as amonolithic and compact power-scaling concept for ultrafast fiber lasers. Amicrolens array matched to the multicore fiber and an active phasecontroller composed of a spatial light modulator applying a stochasticparallel gradient descent algorithm are utilized to perform coherentcombining in the tiled aperture geometry. The mitigation of nonlineareffects at a pulse energy of 8.9 μJ and duration of 860 fs is experimentallyverified at a repetition rate of 100 kHz. The experimental combiningefficiency 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 bygroup delay differences between cores which is identified as the maindrawback of the system. Minimizing these group delay issues, e.g. by usingshort and straight rod-type multicore fibers, should allow a practical powerscaling solution for femtosecond fiber systems.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL