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We present a high-power, MHz-repetition-rate, phase-stable femtosecond laser system based on a phase-stabilized Ti:Sa oscillator and a multi-stage Yb-fiber chirped-pulse power amplifier. A 10-nm band around 1030 nm is split from the 7-fs oscillator output and serves as the seed for subsequent amplification by 54 dB to 80 W of average power. The µJ-level output is spectrally broadened in a solid-core...
The application of solid core photonic bandgap fibres to high power transmission in fibre amplification systems is presented. Because of the spectral filtering characteristics of such fibres with at least several hundreds of dB/km outside the transmission window of the spectrum, stimulated Raman scattering can be reduced. The limitations of such fibres in high power transmission are discussed based...
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