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Fiber chirped pulse amplifier at 2.08 µm emitting 383-fs pulses at 10 nJ and 7 MHz

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Fiber chirped pulse amplifier at 2.08 µm emitting 383-fs pulses at 10 nJ and 7 MHz

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  • Author: H. Hoogland, S. Wittek, W. Hänsel, S. Stark, & R. Holzwarth
An all-polarization maintaining (PM) fiber chirped pulse amplifier system at 2.08 μm based on thulium:holmium codoped gain fibers is reported. An inhouse built oscillator emits pulses at a repetition rate of 7 MHz with a spectral full width at half-maximum (FWHM) bandwidth of 23.5 nm at 2.8 mW average output power. The pulses are temporally stretched and subsequently amplified in a double-stage amplifier setup.

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