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

Yingjie LIN, Qiong ZENG, Yubo JI, Yufeng SONG, Ke WANG, and Zhenhong WANG

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.

Tools

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

Download Citation

EndNote(RIS)BibTexPlain Text
Save article for my favorites
Paper Information

Received: Apr. 14, 2024

Accepted: Apr. 11, 2025

Published Online: Apr. 11, 2025

The Author Email:

DOI:10.1007/s11801-025-4096-7

Topics