孤子分子/类噪声脉冲可切换的混合锁模光纤激光器

Switchable soliton molecules and noise-like pulses in hybrid mode-locking fiber laser

不同类型脉冲之间的演化是被动锁模光纤激光器丰富动力学的体现。报道了一种可实现多种脉冲切换的混合锁模光纤激光器,当泵浦功率为400 mW时实现了孤子分子、谐波锁模、孤子簇之间的相互切换。增加泵浦功率至600 mW时获得了类噪声脉冲输出,对应的输出功率和单脉冲能量分别为15.2 mW和0.86 nJ。通过调节偏振控制器实现了类噪声脉冲中心波长从1 895 nm到1 930 nm可调谐。所搭建的激光器具有锁模脉冲可切换,波长可调谐,能自启动等优点。

The evolution between different types of pulses is the embodiment of the passive mode-locking fiber laser rich dynamics. A hybrid mode-locking fiber laser with multiple pulse switching was reported. When the pump power was 400 mW, the mutual switch of pulses between soliton molecules, harmonic mode-locking and soliton clusters were realized. Then, when the pump power was increased to 600 mW, the noise-like pulse output was realized, and the corresponding output power and single pulse energy were 15.2 mW and 0.86 nJ,respectively. By adjusting the polarization controller, the central wavelength of noise-like pulse could be tuned from 1 895 nm to 1 930 nm. The designed laser has the advantages of mode-locking switching, wavelength tuning and automatic start.