The pulse energy in the ultrafast soliton fiber laser oscillators is usually limited by the well-known wave-breaking phenomenon owing to the absence era desirable real saturable absorber （SA） with high power toleran...The pulse energy in the ultrafast soliton fiber laser oscillators is usually limited by the well-known wave-breaking phenomenon owing to the absence era desirable real saturable absorber （SA） with high power tolerance and large modulation depth. Here, we report a type of microfiber-based MoTe2 SA fabricated by the magnetron-sputtering deposition （MSD） method. High-energy wave-breaking free soliton pulses were generated with pulse duration/pulse energy/average output power of 229 fs/2.14 nJ/57 mW in the 1.5 μm regime and 1.3 ps/13.8 nJ/ 212 mW in the 2 μm regime, respectively. To our knowledge, the generated soliton pulses at 1.5μm had the shortest pulse duration and the highest output power among the reported erbium-doped fiber lasers mode locked by transition metal dichalcogenides. Moreover, this was the first demonstration of a MoTe2-based SA in fiber lasers in the 2 ltm regime, and the pulse energy/output power are the highest in the reported thulium-doped fiber lasers mode locked by two-dlmensional materials. Our results suggest that a microfiber-based MoTe2 SA could be used as an excellent photonic device for ultrafast pulse generation, and the MSD technique opens a promising route to produce a high-performance SA with high power tolerance and large modulation depth, which are beneficial for high-energy wave-breaking free pulse generation.展开更多
利用SRIM软件模拟Ar+以不同能量和角度溅射铜靶,根据计算结果得出溅射产额随入射离子能量和角度的变化规律:溅射产额在低能区(0.1-10 ke V)随入射离子能量的增加而增大,在高能区(10-100 ke V)随入射离子能量的增加变化不大且逐渐减小;...利用SRIM软件模拟Ar+以不同能量和角度溅射铜靶,根据计算结果得出溅射产额随入射离子能量和角度的变化规律:溅射产额在低能区(0.1-10 ke V)随入射离子能量的增加而增大,在高能区(10-100 ke V)随入射离子能量的增加变化不大且逐渐减小;溅射产额随着离子入射角的增加逐渐增大,且在60°-80°之间有一极大值,而当入射角再变大时溅射产额急剧下降;入射角在0°-60°范围内,相对溅射产额与入射角余弦值近似成反比。溅射产额的变化规律可利用级联碰撞理论做出合理解释。展开更多
基金National Natural Science Foundation of China(NSFC)(11704260,61405126,61605122,61775146)Shenzhen Science and Technology Project(JCY20150324141711695,JCYJ20160427105041864,JSGG20160429114438287,KQJSCX20160226194031,JCYJ20160422103744090)+1 种基金Beijing University of Posts and Telecommunications(BUPT)(IPOC2015B003)Natural Science Foundation of Guangdong Province(2016A030310049,2016A030310059)
文摘The pulse energy in the ultrafast soliton fiber laser oscillators is usually limited by the well-known wave-breaking phenomenon owing to the absence era desirable real saturable absorber （SA） with high power tolerance and large modulation depth. Here, we report a type of microfiber-based MoTe2 SA fabricated by the magnetron-sputtering deposition （MSD） method. High-energy wave-breaking free soliton pulses were generated with pulse duration/pulse energy/average output power of 229 fs/2.14 nJ/57 mW in the 1.5 μm regime and 1.3 ps/13.8 nJ/ 212 mW in the 2 μm regime, respectively. To our knowledge, the generated soliton pulses at 1.5μm had the shortest pulse duration and the highest output power among the reported erbium-doped fiber lasers mode locked by transition metal dichalcogenides. Moreover, this was the first demonstration of a MoTe2-based SA in fiber lasers in the 2 ltm regime, and the pulse energy/output power are the highest in the reported thulium-doped fiber lasers mode locked by two-dlmensional materials. Our results suggest that a microfiber-based MoTe2 SA could be used as an excellent photonic device for ultrafast pulse generation, and the MSD technique opens a promising route to produce a high-performance SA with high power tolerance and large modulation depth, which are beneficial for high-energy wave-breaking free pulse generation.
文摘利用SRIM软件模拟Ar+以不同能量和角度溅射铜靶,根据计算结果得出溅射产额随入射离子能量和角度的变化规律:溅射产额在低能区(0.1-10 ke V)随入射离子能量的增加而增大,在高能区(10-100 ke V)随入射离子能量的增加变化不大且逐渐减小;溅射产额随着离子入射角的增加逐渐增大,且在60°-80°之间有一极大值,而当入射角再变大时溅射产额急剧下降;入射角在0°-60°范围内,相对溅射产额与入射角余弦值近似成反比。溅射产额的变化规律可利用级联碰撞理论做出合理解释。
