Wu Xu, Zhou Zewen, Yin Jinde, Zhang Min, Zhou Liangliang, Na Quanxin, Wang Jintao, Yu Yang, Wang Junbo, Chi Ronghua, Yan Peiguang
Shenzhen Key Laboratory of Laser Engineering, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China. Sino-German College of Intelligent Manufacturing, Shenzhen Technical University, Shenzhen 518118, People's Republic of China.
Nanotechnology. 2020 Mar 27;31(24):245204. doi: 10.1088/1361-6528/ab7a2f. Epub 2020 Feb 26.
We demonstrate the HfSe saturable absorber (SA) for the generation of ultrafast pulse laser. The HfSe SA device is fabricated by integrating HfSe nanosheets (NSs) with a microfiber. The material and optical characteristics of HfSe NSs show their high quality. The nonlinear optical absorption of HfSe SA is measured with a modulation depth of 5.8%. Stable soliton mode-locked laser based on HfSe SA is realized at the central wavelength of 1561.43 nm with pulse duration of 297 fs and the maximum pulse energy of 2.68 nJ. Our soliton fiber laser has a maximum output power of 48.5 mW with a high slope efficiency of 12.8%, which indicate that HfSe is a good candidate of SA for high efficient ultrashort pulses generation.
我们展示了用于产生超快脉冲激光的HfSe可饱和吸收体（SA）。通过将HfSe纳米片（NSs）与微光纤集成来制造HfSe SA器件。HfSe NSs的材料和光学特性显示出其高质量。测量了HfSe SA的非线性光吸收，调制深度为5.8%。基于HfSe SA实现了中心波长为1561.43 nm、脉冲持续时间为297 fs且最大脉冲能量为2.68 nJ的稳定孤子锁模激光器。我们的孤子光纤激光器最大输出功率为48.5 mW，斜率效率高达12.8%，这表明HfSe是用于高效产生超短脉冲的SA的良好候选材料。
