Title :
Square Nanosecond Mode-Locked Laser Based on Nonlinear Amplifying Loop Mirror
Author :
Yang Liu ; Wenxue Li ; Xuling Shen ; Chao Wang ; Zhiying Yang ; Heping Zeng
Author_Institution :
State Key Lab. of Precision Spectrosc., East China Normal Univ., Shanghai, China
Abstract :
Square nanosecond mode-locking was demonstrated in a short-cavity polarization-maintaining (PM) fiber laser with a nonlinear amplifying loop mirror (NALM). Nonlinear phase shifts in the NALM enforced peak-power clamping and accordingly, the output pulse duration varied with the NALM gain. Gain competition of multipulse mode-locking was observed with short NALM loops. Such NALM-based mode-locking exhibited long-term stability against environmental disturbance.
Keywords :
fibre lasers; laser beams; laser cavity resonators; laser mirrors; laser mode locking; laser stability; nonlinear optics; optical fibre polarisation; optical phase shifters; NALM enforced peak-power clamping; NALM gain; NALM-based mode-locking; PM; environmental disturbance; gain competition; long-term stability; multipulse mode-locking; nonlinear amplifying loop mirror; nonlinear phase shifts; output pulse duration; short NALM loops; short-cavity polarization-maintaining fiber laser; square nanosecond mode-locked laser; square nanosecond mode-locking; Erbium-doped fiber lasers; Laser mode locking; Laser stability; Optical fiber dispersion; Optical fiber polarization; Pump lasers; Laser mode locking; fiber laser; optical pulse;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2342238
