Ma Wanzhuo, Wang Tianshu, Zhang Yan, Liu Peng, Su Yuwei, Jia Qingsong, Bi Mingzhe, Zhang Peng, Jiang Huilin
Appl Opt. 2017 Apr 20;56(12):3342-3346. doi: 10.1364/AO.56.003342.
We propose and experimentally demonstrate a widely tunable mode-locked thulium-doped fiber laser. The laser can operate at both continuous-wave and mode-locked states at different pump power levels. A classic nonlinear polarization rotation structure is employed to obtain the passive mode-locked laser. A birefringence Lyot filter as a fiber comb filter is used to expand the tuning range. Thanks to the filtering component, the tuning range of the continuous-wave laser can reach 127 nm (1823-1950 nm). The tuning ranges of the single-wavelength and dual-wavelength mode-locked lasers are 94 nm (1835-1929 nm) and 87 nm (1831-1918 nm), respectively, with a 3.085 MHz repetition rate and 75 ps pulse width.
我们提出并通过实验证明了一种广泛可调谐的锁模掺铥光纤激光器。该激光器在不同泵浦功率水平下可在连续波和锁模状态下工作。采用经典的非线性偏振旋转结构来获得被动锁模激光器。使用双折射Lyot滤波器作为光纤梳状滤波器来扩展调谐范围。得益于滤波组件，连续波激光器的调谐范围可达127nm（1823 - 1950nm）。单波长和双波长锁模激光器的调谐范围分别为94nm（1835 - 1929nm）和87nm（1831 - 1918nm），重复频率为3.085MHz，脉冲宽度为75ps。
