Title :
Pulse-State Switchable Fiber Laser Mode-Locked by Carbon Nanotubes
Author :
Dong Mao ; Biqiang Jiang ; Wending Zhang ; Jianlin Zhao
Author_Institution :
Key Lab. of Space Appl. Phys. & Chem., Northwestern Polytech. Univ., Xi´an, China
Abstract :
We proposed a carbon nanotube (CNT) mode-locked fiber laser delivering chirp-free soliton (CFS) and chirped pulse (CP) simultaneously or separately based on a circulator and chirped fiber Bragg grating (CFBG). The CFS reflected by the CFBG exhibits spectral sidebands with a bandwidth of 0.27 nm, whereas the CP has a smooth spectrum with a bandwidth of 4.1 nm. The durations of the CFS and CP are 9.6 and 1.3 ps, respectively. Due to the large anomalous dispersion and spectral filtering of CFBG, the CFS maintains low intensity and accumulates high energy without wave breaking. Numerical simulations agree well with the experiment and confirm the strong pulse shaping ability of CNT. The operation-switchable fiber laser may facilitate the practical applications where multitype pulses are necessary.
Keywords :
Bragg gratings; carbon nanotubes; fibre lasers; laser beams; laser mode locking; numerical analysis; optical circulators; optical fibre dispersion; optical fibre filters; optical pulse shaping; optical solitons; C; CFBG; CFS; CNT; CP; anomalous dispersion; bandwidth; carbon nanotube mode-locked fiber laser; chirp-free soliton; chirped fiber Bragg grating; chirped pulse; circulator; multitype pulses; numerical simulations; operation-switchable fiber laser; pulse-state switchable fiber laser mode-locking; spectral filtering; spectral sidebands; strong pulse shaping ability; time 1.3 ps; time 9.6 ps; Erbium-doped fiber lasers; Fiber gratings; Laser mode locking; Optical fiber dispersion; Optical fiber polarization; Mode locking; carbon nanotube; fiber resonator; mode locking; ultrafast fiber laser;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2366164
