Dispersion‐Less Dissipative Soliton Fiber Laser

ABSTRACT Dispersion engineering has been instrumental in promoting, through intracavity pulse stretching, the generation of higher‐energy mode‐locked pulses. Such approach requires extra‐cavity compression and struggles to deliver bell‐shaped pulses. However, in the context of dissipative solitons, it is also possible to generate energetic, pedestal‐free pulses in the quasi‐absence of dispersive linear effects. We achieve the latter by tailoring picosecond pulses through spectral filtering, inspired by the recently reported energy‐managed soliton laser architecture. The present dispersion‐less energy‐managed mode‐locked fiber laser demonstrates remarkable flexibility in both pulse energy and duration. Its experimental validation, using standard telecom components in the telecom window, yields mode‐locked pulses of up to at a repetition rate of 1.9 MHz. We introduce an additional energy scaling by incorporating a few‐mode gain fiber to generate pulses featuring low spectral distortion.