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石墨烯材料由于其优异的电学和光学性质,在被动锁模激光器中作为可饱和吸收体,得到了广泛应用。利用化学气相沉积法高温分解甲烷在铜箔上制得单层石墨烯薄膜,并测量了石墨烯的拉曼光谱。将石墨烯薄膜转移到光纤跳线的氧化锆插芯端面上做成可饱和吸收材料。实验研究了环形腔掺铒光纤脉冲激光器的输出特性,激光器由透射率为92%的光纤布拉格光栅作为输出腔镜,获得了峰值波长为1556.7nm,3dB带宽为0.068nm,重复频率为6.042MHz,脉冲宽度为58.8ps的脉冲序列,激光阈值为65mW。
Due to its excellent electrical and optical properties, graphene has been widely used as a saturable absorber in passive mode-locked lasers. A single-layer graphene thin film was prepared on the copper foil by pyrolysis of methane by chemical vapor deposition. The Raman spectrum of graphene was also measured. The graphene film was transferred to the optical fiber jumper zirconia ferrule end made of saturable absorbent material. The output characteristics of an erbium-doped fiber pulsed laser with annular cavity were experimentally studied. The laser was fabricated by a fiber Bragg grating with a transmittance of 92% as an output cavity mirror. The peak wavelength was 1556.7 nm, the 3dB bandwidth was 0.068 nm, the repetition frequency was 6.042 MHz, A pulse sequence with a pulse width of 58.8ps has a laser threshold of 65mW.