ZHANG Ziyi,WANG Chuncan,LI Jing,WANG Peng.Coherence analysis of noise-like pulses generated by an erbium-doped fiber mode-locked laser[J].Optoelectronics Letters,2024,(4):205-210 Coherence analysis of noise-like pulses generated by an erbium-doped fiber mode-locked laser Author Name Affiliation ZHANG Ziyi  Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China  WANG Chuncan  Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China  LI Jing  Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China  WANG Peng  Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China  Abstract:       The noise-like pulses (NLPs) with tunable fraction of the pedestal height in the whole intensity autocorrelation (AC) trace are numerically demonstrated in the designed erbium-doped fiber (EDF) mode-locked laser, which contains the saturable absorber (SA) with nonlinear polarization rotation (NPR), sinusoidal-shaped or Gaussian-shaped filter, two segments of EDFs, and two pieces of single-mode fibers (SMFs) with normal dispersion and anomalous dispersion, respectively. The pedestal ratio of the intensity AC trace can be tuned by changing the gain saturation energies of EDFs. The results show that when the net cavity dispersion is 1.06 ps2, the tuning range of the pedestal ratio for the NLPs can reach its maximum values, which are 0.51—0.89 and 0.58—0.88 for the sinusoidal-shaped and Gaussian-shaped filters, respectively. In addition, an appropriate choice of filter bandwidth is also conducive to obtain a wide range of the tuning pedestal ratio for the intensity AC trace. Hits: 0 Download times: 0 View Full Text    Download reader