Direct carrier–envelope phase stabilization of a soliton-effect compressed sub-two-cycle pulse source through nonlinear mixing of solitonic and dispersive waves
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We present a carrier–envelope phase (CEP) stabilized sub-two-cycle 5.2 fs pulse source based on soliton-effect self-compression of femtosecond laser pulses in millimetre-long highly nonlinear photonic crystal fibres. We employ a simple and efficient scheme to generate a strong (40–60 dB, configuration dependent) CEP beat signal directly from the pulse source via f-to-2f interferometry where the second harmonic of the main soliton pulse is mixed with the isolated dispersive blue/green radiation peak that is also generated in the compression process, obviating the need for additional spectral broadening mechanisms.
KeywordsPhase Noise Photonic Crystal Fibre Pulse Source Beat Signal Relative Intensity Noise
We gratefully acknowledge the fruitful discussions with Luc Bergé from CEA-DAM, during and after the Conference CLEO-EQEC 2011, in Munich. This work was partly supported by FCT: Fundação para a Ciência e a Tecnologia and FEDER through grant PTDC/FIS/115102/2009. A. A. Amorim acknowledges financial support from IPP-ISEP (Instituto Politécnico do Porto – Instituto Superior de Engenharia do Porto), Portugal, under a PhD grant from the PFAD: Programa de Formação Avançada de Docentes.
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