WANG Li-li,XIN Xiang-jun,ZHU Lin-wei.A widely tunable fiber ring laser with closed loop control based on high-precision stepper motor[J].Optoelectronics Letters,2016,12(3):169-172 A widely tunable fiber ring laser with closed loop control based on high-precision stepper motor Author Name Affiliation WANG Li-li  School of Information and Electrical Engineering, Ludong University, Yantai 264025, China  XIN Xiang-jun  School of Electronic Engineering, Beijing University of Posts &Telecommunication, Beijing 100876, China  ZHU Lin-wei  School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China  Abstract:       A tunable single-longitudinal mode erbium-doped fiber ring laser based on stepper motor and closed loop control is proposed and demonstrated. The system consists of an erbium-doped fiber (EDF), a tunable fiber Bragg grating (FBG) filter and a wavelength detector. The characteristics of output laser, such as output power, power stability and 3-dB linewidth, are investigated in the operation range of 1 531—1 569 nm. The repeated experimental results of the fiber laser show that the 3-dB linewidth is less than 17 ps, the side-mode suppression ratio (SMSR) is up to 60 dB, the output power is up to 1.37 dBm, and the power variation is less than 0.61 dB. Hits: 4356 Download times: 0 View Full Text    Download reader