All Fiber, High-energy Mamyshev Oscillator

Mamyshev oscillators (MOs) can produce ultra-short optical pulses. However, achieving high-energy, stable ultra-short optical pulses with a self-starting in an all-fiber MO remains a significant challenge. By designing a temperature-sensitive bandpass filter with continuously and accurately adjustable bandwidth and wavelength, and using it as two offset spectral filters for MO, the pulse energy of the MO can reach 156.3 nJ. As far as we know, this is at least 1.4 times higher than the highest energy reported for all-fiber self-starting MO with similar fiber mode areas. In addition, by adjusting the temperature of the filters and the pump power, we have also observed the entire process of suppressing subpulses in MOs. Combining self-starting, high-energy, stable, and all-fiber structure characteristics should make the application of MOs highly attractive. Simulation results well reproduce and interpret the key experimental phenomena.