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Proceedings Paper

Single crystal fiber for laser sources
Author(s): Xavier Délen; Adrien Aubourg; Loïc Deyra; Fabien Lesparre; Igor Martial; Julien Didierjean; François Balembois; Patrick Georges
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Paper Abstract

Single crystal fiber (SCF) is a hybrid laser architecture between conventional bulk laser crystals and active optical fibers allowing higher average powers than with conventional crystals and higher energy than with fibers in pulsed regime. The pump beam delivered by a fiber-coupled laser diode is confined by the guiding capacity of the SCF whereas the signal beam is in free propagation. In this paper, we study the pump guiding in the SCF and give an overview of the results obtained using SCF gain modules in laser oscillators and amplifiers. We report about up to 500 μJ nanosecond pulses at the output of a passively Q-switched Er:YAG SCF oscillator at 1617 nm. High power experiments with Yb:YAG allowed to demonstrate up to 250 W out of a multimode oscillator. High power 946 nm Nd:YAG SCF Q-switched oscillators followed by second and fourth harmonic generation in the blue and the UV is also presented with an average power up to 3.4 W at 473 nm and 600 mW at 236.5 nm. At 1064 nm, we obtain up to 3 mJ with a nearly fundamental mode beam in sub-nanosecond regime with a micro-chip laser amplified in a Nd:YAG SCF. Yb:YAG SCF amplifiers are used to amplify fiber based sources limited by non-linearities such as Stimulated Brillouin Scattering with a narrow linewidth laser and Self Phase Modulation with a femtosecond source. Using chirped pulse amplification, 380 fs pulses are obtained with an energy of 1 mJ and an excellent beam quality (M2<1.1).

Paper Details

Date Published: 26 March 2015
PDF: 8 pages
Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 934202 (26 March 2015); doi: 10.1117/12.2081184
Show Author Affiliations
Xavier Délen, Lab. Charles Fabry, Institut d’Optique, CNRS, Univ. Paris Sud (France)
Adrien Aubourg, Lab. Charles Fabry, Institut d’Optique, CNRS, Univ. Paris Sud (France)
Fibercryst SAS (France)
Loïc Deyra, Lab. Charles Fabry, Institut d’Optique, CNRS, Univ. Paris Sud (France)
Fabien Lesparre, Lab. Charles Fabry, Institut d’Optique, CNRS, Univ. Paris Sud (France)
Fibercryst SAS (France)
Igor Martial, FiberCryst SAS (France)
Julien Didierjean, FiberCryst SAS (France)
François Balembois, Lab. Charles Fabry, Institut d’Optique, CNRS, Univ. Paris Sud (France)
Patrick Georges, Lab. Charles Fabry, Institut d’Optique, CNRS, Univ. Paris Sud (France)


Published in SPIE Proceedings Vol. 9342:
Solid State Lasers XXIV: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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