We report on the generation of multiwavelength Q-switched pulses from a Ytterbium-doped fiber laser (YDFL) cavity by employing a nickel nanoparticle (Ni-NPs) thin film as an optical modulator. Owing to the high nonlinearity of Ni-NPs and the distinguished saturable absorption property, stable single-, dual-, triple-, or quadruple-line, Q-switched generation with a 0.7 nm channel spacing have been achieved by simply adjusting the 976 nm pump power to between 144–290 mW. At the maximum diode pump power, the output obtained from Ytterbium-doped fiber laser (YDFL) has a minimum pulse width of 138.7 ns, a maximum repetition rate of 82.4 kHz, a maximum pulse energy of 9.1 nJ and a maximum output power of 777.14 µW.

我们报告通过使用镍纳米粒子（Ni-NPs）薄膜作为光调制器，从掺-光纤激光器（YDFL）腔中产生多波长Q开关脉冲。由于Ni-NP的高度非线性和出色的可饱和吸收特性，通过简单地调节976 nm，可以实现具有0.7 nm通道间隔的稳定的单线，双线，三线或四线制Q开关泵功率在144–290 mW之间。在最大二极管泵浦功率下，掺Y光纤激光器（YDFL）获得的输出的最小脉冲宽度为138.7 ns，最大重复频率为82.4 kHz，最大脉冲能量为9.1 nJ，最大输出功率为777.14微瓦。