Two-channel pulse synthesis to overcome gain narrowing in femtosecond fiber amplifiers

Florent Guichard (1, 2) , Marc Hanna (1) , Laurent Lombard (3) , Yoann Zaouter (2) , Clemens Hönninger (2) , Franck Morin (2) , Frédéric Druon (1) , Eric Mottay (2) , Patrick Georges (1)

1 Laboratoire Charles Fabry / Lasers
2 Amplitude Systèmes
3 ONERA - The French Aerospace Lab [Palaiseau]

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 are 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.

Domains: Optics [physics.optics]

Florent Guichard, Marc Hanna, Laurent Lombard, Yoann Zaouter, Clemens Hönninger, et al.. Two-channel pulse synthesis to overcome gain narrowing in femtosecond fiber amplifiers. Optics Letters, 2013, 38 (24), pp.5430-5433. ⟨10.1364/OL.38.005430⟩. ⟨hal-00925386⟩