Mode-locking of Er-doped fiber laser using a multilayer MoS2 thin film as a saturable absorber in both anomalous and normal dispersion regimes
Mode-locking of Er-doped fiber laser using a multilayer MoS2 thin film as a saturable absorber in both anomalous and normal dispersion regimes
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DOI：
10.1364/oe.22.023732
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发表时间：
2014-09-22
期刊：
影响因子：
3.8
通讯作者：
Oh, Kyunghwan
中科院分区：
文献类型：
--
作者：
Khazaeizhad, Reza;Kassani, Sahar Hosseinzadeh;Oh, Kyunghwan
通过光与二硫化钼(MoS_2)薄膜之间的逝去场相互作用，实现了稳定而稳定的被动锁模光纤激光器，实验证明了MoS_2薄膜作为可饱和吸收材料的应用。用化学气相沉积法生长了MoS_2薄膜，然后用剥离的方法将其转移到侧面抛光光纤上。实验观察到MoS_2薄膜在侧面抛光光纤中的强度依赖光传输，表现出有效的饱和吸收特性。利用掺铒光纤作为光增益介质，构建了一个全光纤环形腔，在侧面抛光的光纤上插入MoS2薄膜作为可饱和吸收体。在正常色散区成功地产生了稳定的耗散孤子脉冲串，其光谱带宽为23.2 nm，脉宽为4.98ps。通过调节腔内总色散，在波长为1.55微米的反常色散区获得了宽度为637ps的孤子脉冲，并对正常和反常两种情况下的全光纤激光腔的稳定锁模进行了详细系统的实验比较。(C)2014年美国光学学会
Application of a multilayer Molybdenum Disulfide (MoS2) thin film as a saturable absorber was experimentally demonstrated by realizing a stable and robust passive mode-locked fiber laser via the evanescent field interaction between the light and the film. The MoS2 film was grown by chemical vapor deposition, and was then transferred to a side polished fiber by a lift-off method. Intensity-dependent optical transmission through the MoS2 thin film on side polished fiber was experimentally observed showing efficient saturable absorption characteristics. Using erbium doped fiber as an optical gain medium, we built an all-fiber ring cavity, where the MoS2 film on the side polished fiber was inserted as a saturable absorber. Stable dissipative soliton pulse trains were successfully generated in the normal dispersion regime with a spectral bandwidth of 23.2 nm and the pulse width of 4.98 ps. By adjusting the total dispersion in the cavity, we also obtained soliton pulses with a width of 637 fs in the anomalous dispersion regime near the lasing wavelength lambda = 1.55 mu m. Detailed and systematic experimental comparisons were made for stable mode locking of an all-fiber laser cavity in both the normal and anomalous regimes. (C) 2014 Optical Society of America