Control and Characterization of Soliton-Like Pulses in a Femtosecond Dye Laser

摘要

The balance of positive self-phase modulation (SPM) and negative group velocity dispersion (GVD) that enhances ultra short pulse formation in a dispersion compensated, colliding pulse modelocked (CPM) dye laser has been compared to the shaping mechanism for the N=1 soliton in an optical fiber. Periodic pulseshaping reminiscent of higher order solitons has also been observed. It is however unclear how far the analogy in an optical fiber can be extended. Reported here are results of this investigation of periodic pulseshaping in a 7 mirror/4 prism CPM laser that delivers pulses as short as 35fs at 100 MHz. The stability achieved allows for reproducibility and full time-resolved characterization. Reprints. (JHD)