Optoelectronics Letters, Volume. 21, Issue 5, 265(2025)
Generation and dynamics of special mode-locked pulses in an ultrafast Er-doped fiber laser with SMF-GIMF-SMF saturable absorber
In this paper, we have demonstrated an Er-doped ultrafast laser with a single mode fiber-gradient index multimode fiber-single mode fiber (SMF-GIMF-SMF, SMS) structure as saturable absorber (SA), which can generate not only stable single-pulse state, but also special mode-locked pulses with the characteristics of high energy and noisy behaviors at proper pump power and cavity polarization state. In addition, we have deeply investigated the real-time spectral evolutions of the mode-locked pulses through the dispersive Fourier transformation (DFT) technique. It can be found that the pulse regime can actually consist of a lot of small noise pulses with randomly varying intensities. We believe that these results will further enrich the nonlinear dynamical processes in the ultrafast lasers.
Get Citation
Copy Citation Text
LIN Yingjie, ZENG Qiong, JI Yubo, SONG Yufeng, WANG Ke, WANG Zhenhong. Generation and dynamics of special mode-locked pulses in an ultrafast Er-doped fiber laser with SMF-GIMF-SMF saturable absorber[J]. Optoelectronics Letters, 2025, 21(5): 265
Received: Apr. 14, 2024
Accepted: Apr. 11, 2025
Published Online: Apr. 11, 2025
The Author Email: