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7 March 2014 Spectral synthesis to overcome gain-narrowing in femtosecond fiber amplifiers
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We demonstrate spectral coherent beam combining of two femtosecond fiber chirped-pulse amplifiers seeded by a common oscillator. Using active phase stabilization based on an electro-optic phase modulator, an average power of 10 W before compression and a high gain factor of 30 dB is obtained. At this gain value, 130 fs pulses with a spectral width of 19 nm can be generated, highlighting the strong potential of pulse synthesis for the reduction of the minimum duration of ultrashort pulses in fiber chirped-pulse amplifiers.
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Florent Guichard, Marc Hanna, Laurent Lombard, Yoann Zaouter, Frédéric Druon, Eric Mottay, and Patrick Georges "Spectral synthesis to overcome gain-narrowing in femtosecond fiber amplifiers", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 89611G (7 March 2014);

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