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Schematic setup used for direct generation of transform-limited pulses (PBS, polarization-dependent beam splitter; PC: polarization controller; SMF, standard single-mode fiber; EDF, erbium-doped fiber).
Numerically calculated laser output pulse.
Pulse shaping within one cavity transit. (a) Temporal evolution, (b) Spectral evolution. The arrows indicate the direction of the spectrum evolution as the pulse propagates in the fibers.
Experimental autocorrelation trace and optical spectrum.
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