期刊
QUANTUM ELECTRONICS
卷 44, 期 5, 页码 458-464出版社
TURPION LTD
DOI: 10.1070/QE2014v044n05ABEH015432
关键词
high peak power fibre laser systems; erbium-doped fibre amplifiers; large mode area fibres; ultra-short pulses; dispersive waves
资金
- Presidium of the Russian Academy of Sciences
- RF President's Grants Council [MK-5947.2014.2]
- Dynasty Nonprofit Foundation
- Russian Foundation for Basic Research [12-08-33101, 13-02-00755, 14-02-31645]
We have demonstrated a femtosecond erbium-doped fibre laser system built in the master oscillator/power amplifier (MOPA) approach. The final amplifier stage utilises a specially designed large mode area active fibre cladding-pumped by multimode laser diodes. The system is capable of generating submicrojoule pulses at a wavelength near 1.6 mu m. We have obtained 530-fs pulses with an energy of 400 nJ. The output of the system can be converted to wavelengths shorter than 1 mm through the generation of dispersive waves in passive nonlinear fibre. We have obtained ultra-short 7-nJ pulses with a spectral width of similar to 100 nm and a centre wavelength of 0.9 mu m, which can be used as a seed signal in parametric amplifiers in designing petawatt laser systems.
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