164 fs mode-locked erbium-doped fiber laser based on tungsten ditelluride

Nanophotonics

article

Mengli Liu¹  Wenjun Liu¹  Ximei Liu¹  Yuyi Ouyang¹  Zhiyi Wei² 

[1]State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications

[2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

关键词: two-dimensional nanomaterials;    saturable absorbers;    mode-locked laser;    fiber lasers;   

DOI  :  10.1515/nanoph-2019-0477

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

In recent years, the diversity of transition metal dichalcogenides (TMDs) has made them occupy the essential status in the exploration of saturable absorbing materials. WTe 2 , also an important member of TMDs not only exhibits narrower band gap than MoS 2 or WS 2 , but also has fast relaxation time, thus it has advantages in the realization of broadband absorption and ultrashort pulses. In this work, a WTe 2 saturable absorber (SA) fabricated by magnetron sputtering technology features nonlinear absorption coefficient of −3.78 × 10 −5 cm/W and modulation depth of 37.95%. After integrating this WTe 2 SA into the ring cavity, a 164 fs mode-locked laser is achieved at 1557.71 nm. The laser remains stable about 8 h with an output power of 36.7 mW. The results show the favorable saturable absorption properties of WTe 2 , and further demonstrate the potential of WTe 2 in the realization of ultrashort pulses, which indicates that WTe 2 can be regarded as a possible candidate for future ultrafast lasers.

【 授权许可】

CC BY