Xu Jia, Liu Jiang, Wu Sida, Yang Quan-Hong, Wang Pu
Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China.
Opt Express. 2012 Jul 2;20(14):15474-80. doi: 10.1364/OE.20.015474.
We demonstrated the femtosecond erbium-doped all-fiber lasers mode-locked with graphene oxide, which can be conveniently obtained from natural graphite by simple oxidation and ultra-sonication process. With proper dispersion management in an all-fiber ring cavity, the laser directly generated 200 fs pulses at a repetition rate of 22.9 MHz and the average output power was 5.8 mW. With the variation of net cavity dispersion, output pulses with pulse width of 0.23 ps were obtained at a repetition rate of 22.90.93 MHz. These results are comparable with those of graphene saturable absorbers and the superiority of easy fabrication and hydrophilic property of graphene oxide will facilitate its potential applications for ultrafast photonics.
我们展示了用氧化石墨烯锁模的飞秒掺铒全光纤激光器，氧化石墨烯可通过简单的氧化和超声处理过程从天然石墨方便地获得。在全光纤环形腔中进行适当的色散管理，该激光器直接产生了重复频率为22.9MHz、脉宽为200fs的脉冲，平均输出功率为5.8mW。随着净腔色散的变化，在重复频率为22.90.93MHz时获得了脉宽为0.23ps的输出脉冲。这些结果与石墨烯可饱和吸收体的结果相当，氧化石墨烯易于制备和亲水的优势将促进其在超快光子学中的潜在应用。
