Graded index fiber as an all-fiber saturable absorber for large energy conventional soliton and dissipative soliton generation  

作　　者：ZHAOKUN WANG JIKAI CHEN TIANYU ZHU D.N.WANG FENG GAO 

机构地区：[1]College of Optical and Electronic Technology, China Jiliang University

出　　处：《Photonics Research》2019年第11期1214-1220,共7页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61805225)

摘　　要：In this work, we investigate the possibility of achieving nanojoule level pulse energy in an all-fiber Er-doped oscillator by using a graded index multimode fiber(GIMF) as the saturable absorber(SA). This GIMF-based SA demonstrates the desirable characteristics of high-power tolerance, large modulation depth of 29.6%, and small saturation fluence of7.19 × 10^-3μJ∕cm^2, which contribute to the high-energy soliton generation. In the experiments, the oscillator generates stable ultrafast pulse trains with high pulse energy/average output power up to 13.65 nJ/212.4 m W in the anomalous regime and 6.25 nJ/72.5 m W in the normal regime, which are among the highest energy/average output power values achieved by all-fiber Er lasers. The results obtained demonstrate that the GIMF-based SA can be used as an effective photonic device for high-energy wave-breaking free pulse generation.In this work, we investigate the possibility of achieving nanojoule level pulse energy in an all-fiber Er-doped oscillator by using a graded index multimode fiber（GIMF） as the saturable absorber（SA）. This GIMF-based SA demonstrates the desirable characteristics of high-power tolerance, large modulation depth of 29.6%, and small saturation fluence of7.19 × 10-3μJ∕cm2, which contribute to the high-energy soliton generation. In the experiments, the oscillator generates stable ultrafast pulse trains with high pulse energy/average output power up to 13.65 nJ/212.4 m W in the anomalous regime and 6.25 nJ/72.5 m W in the normal regime, which are among the highest energy/average output power values achieved by all-fiber Er lasers. The results obtained demonstrate that the GIMF-based SA can be used as an effective photonic device for high-energy wave-breaking free pulse generation.

关 键 词：FIBER SOLITON ABSORBER 

分 类 号：TN2[电子电信—物理电子学]