Dispersion Management Nonlinear Multimode Interference Mode-Locked Ytterbium Fiber Laser

Dispersion management plays an important role in improving the output performance of a mode-locked fiber laser. Therefore, dispersion management is carried out by introducing the grating pair in our experiment. Through adjusting the distance between the grating pair, mode-locked pulses corresponding to different dispersion regimes can be realized, which typically range from soliton state in the anomalous dispersion regime to the dissipative soliton format in the normal dispersion regime. Furthermore, tunable spectrum distribution can be achieved by adjusting two intra-cavity polarization controllers. The proposed dispersion management method complements mode-locking techniques based on nonlinear multimode interference (NL-MMI). The laser can operate with self-start mode locking stably and is useful for practice applications.

Automated summary

By introducing grating pairs for dispersion management, different dispersion regimes can be achieved, ranging from soliton state in the anomalous dispersion regime to dissipative soliton state in the normal dispersion regime. Tunable spectrum distribution can be realized by adjusting two intra-cavity polarization controllers. This dispersion management method complements NL-MMI mode-locking techniques and enables stable self-start mode locking, making it useful for practical applications.