Splitting and Motions of Dissipative Soliton Resonance Pulses in Mode-Locked Fiber Lasers

Yanjia Lyu,Yong Liu,Heping Li,Chen Wei,Wenxiong Du

doi:10.3389/fphy.2019.00173

Abstract

We numerically investigated the splitting and motions of dissipative soliton resonance (DSR) pulses in an all-normal-dispersion Yb-doped fiber laser mode-locked by a nonlinear optical loop mirror. At certain values of the system parameters, the initial single Gaussian pulse can evolve into an unstable DSR pulse with several dark solitons inside. After collisions of dark solitons, a big intensity dip occurs at the center of the DSR pulse, leading to the splitting of the DSR pulse. After splitting, the peak-to-peak separation between two DSR pulses increases at first and finally reaches a fixed value of 193 ps, indicating a steady-state multipulse operation. The relative motions of separated DSR pulse originate from the phase shift.

Highlights

Mode-locked fiber lasers have attracted considerable attention due to their compact and stable performance for generating ultrafast pulse with high peak power [1,2,3,4]
We numerically investigated the dissipative soliton resonance (DSR) pulse splitting process in a non-linear optical loop mirror (NOLM) mode-locked Yb-doped fiber laser using the scalar non-linear Ginzburg-Landau equation
The pulse splitting process of DSR was observed when the pump strength was selected as Esat = 2 nJ

Summary

INTRODUCTION

Mode-locked fiber lasers have attracted considerable attention due to their compact and stable performance for generating ultrafast pulse with high peak power [1,2,3,4]. Splitting of DSR Pulses non-linear amplifying loop mirror based mode-locked Yb-doped fiber laser, and they have numerically studied the multipulse dynamics of DSR with multipulse input field [35]. We numerically investigated the DSR pulse splitting process in a non-linear optical loop mirror (NOLM) mode-locked Yb-doped fiber laser using the scalar non-linear Ginzburg-Landau equation. With specific parameter selection, the initial single pulse can evolve into an unstable DSR pulse with several dark solitons inside, and split into two stable DSR pulses with the same pulse properties (pulse shape, duration, peak power, chirp, and so on) and fixed peak-to-peak (PP) separation This steady-state two DSR pulses operation can be attributed to energy quantization effect [37] and phase shift of pulses [38].

SIMULATION RESULTS AND DISCUSSION

CONCLUSION

DATA AVAILABILITY STATEMENT