Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2011

High power femtosecond chirped pulse amplification in large mode area photonic bandgap Bragg fibers

Résumé

We report on high power amplification of femtosecond pulses in 40-μm core diameter Yb-doped photonic bandgap Bragg fibers. The robustness to bending and transverse spatial behavior of these fibers is analyzed through simulations. The fibers are used in both stages of a moderately stretched (150 ps) femtosecond chirped pulsed amplification (CPA) system. A compressed average power of 6.3W is obtained using a low-index polymer-coated Bragg fiber with excellent beam quality and high efficiency, in agreement with numerical simulations. The use of an air-clad Bragg fiber allows us to scale the output power to 47 W at a repetition rate of 35MHz. This experiment demonstrates the great potential of Bragg fibers to increase the mode area and the power of practical bending-tolerant femtosecond fiber systems.

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hal-00618229 , version 1 (01-09-2011)

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Louis Daniault, Dmitry Gaponov, Marc Hanna, Sébastien Février, Philippe Roy, et al.. High power femtosecond chirped pulse amplification in large mode area photonic bandgap Bragg fibers. Applied Physics B - Laser and Optics, 2011, 103, pp.615-621. ⟨10.1007/s00340-011-4446-y⟩. ⟨hal-00618229⟩
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