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Burst-mode Yb-doped fiber amplifier system optimized for low-repetition-rate operation

2015; Optica Publishing Group; Volume: 32; Issue: 5 Linguagem: Inglês

10.1364/josab.32.000900

1520-8540

Hamit Kalaycıoğlu, Önder Akçaalan, Seydi Yavaş, Y. Burak Eldeniz, F. Ömer İlday,

Laser-Matter Interactions and Applications

We report on the burst-mode operation of a polarization-maintaining Yb-doped multi-stage all-fiber amplifier capable of generating 10-pulse 100 ns long bursts of 400 μJ total energy. The corresponding average energy per pulse is 40 μJ, with a standard deviation of 16%. The 40 μJ pulses are compressible to a full width at half-maximum of 500 fs. The burst repetition rate is set to 1 kHz and the amplifier is synchronously pulse pumped to minimize amplified spontaneous emission (ASE) between the bursts. A special amplifier design has been developed to suppress ASE further at the cost of lower power efficiency. A detailed investigation of gain and ASE suppression performance of the amplifier in relation to pulsed pumping is presented.