Open AccessDual-wavelength step-like pulses in an ultra-large negative-dispersion fiber laser
Author(s) -
Dong Mao,
Xueming Liu,
Leiran Wang,
Hua Lü,
Lina Duan
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.003996
Subject(s) - optics , dispersion (optics) , fiber laser , materials science , dispersion shifted fiber , wavelength , zero dispersion wavelength , birefringence , pulse (music) , laser , optical fiber , physics , fiber optic sensor , detector
We report on experimental observation of dual-wavelength step-like pulses delivered from an erbium-doped fiber laser operating in ultra-large negative-dispersion regime. The step-like pulses consist of two rectangular pulses with different energies, durations as well as optical spectra, and are distinct from the conventional multi-solitons or bound-state solitons in that each pulse holds the same property. We find the weaker (or stronger) rectangular pulse in step-like pulses is more sensitive to the backward (or forward) pump while is less sensitive to the forward (or backward) pump. Our results demonstrate that the dual-wavelength operation results from the combination of fiber dispersion, fiber birefringence, as well as cavity filtering effect, and the intensity difference between rectangular pulses can be attributed to different gain characteristics of the forward and backward pump.