Open AccessInvestigation of rectangular shaped wave packet dynamics in a high-repetition-rate ultrafast fiber laser
Author(s) -
Haoliang Cheng,
W Wang,
Yi Zhou,
Tian Qiao,
Wei Lin,
Shanhui Xu,
Zhongmin Yang
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.020125
Subject(s) - optics , laser , fiber laser , ultrashort pulse , pulse (music) , dispersion (optics) , envelope (radar) , materials science , mode locking , physics , telecommunications , radar , detector , computer science
We identify a new regime where laser pulses represent the dynamics of rectangular-shaped wave packets (RSWPs) in a passively mode-locked Tm 3+ -doped fiber laser. In this regime the laser consists of a train of mode-locked pulses underneath a rectangular-shaped envelope. The density of pulses within a RSWP can be as high as 2.8 GHz, which is consistent with cavity fundamental repetition rate. The effects of small-signal gain value, pulse repetition rate, and net dispersion on the RSWP performance are analyzed. These results imply that this new regime particularly favors high-repetition-rate ultrafast lasers. We further reproduce the phenomenon from using numerical simulations and understand such behavior by referring to the nonlinear dynamics.