8字形主被动锁模掺Er^(3+)光纤激光器  

Figure-Eight Shape Actively and Passively Mode-Locked Erbium-Doped Fiber Laser

作　　者：王肇颖[1] 余震虹[1] 高培良[1] 贾东方[1] 杨天新[1] 葛春风[1] 张瑞峰[1] 丁永奎[1] 李世忱[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室,天津300072

出　　处：《光学学报》2003年第11期1341-1345,共5页Acta Optica Sinica

基　　金：教育部博士点基金 (19990 0 5 6 15 );国家自然科学基金(6 9877012 )资助课题

摘　　要：在理论上分析了利用非线性光学环形镜作为等效可饱和吸收体压缩脉冲进行锁模的物理机制。利用 8字形主被动混合锁模的结构在调制频率 2 .4 9874 9GHz下 ,在 1.5 4 3μm处获得了 12 ps的锁模脉冲输出 ,对应谱宽 0 .2 2nm ,时间脉宽积 0 .33。在抽运功率 5 0mW情况下 ,输出脉冲平均功率 3.715mW。在调制频率 2 .4 99344GHz、2 .4 99114GHz和 2 .4 98999GHz时分别并获得了 2～ 4阶幅度较为均衡的有理数谐波锁模脉冲序列。The advantages of using NOLM as saturable absorber to compress pulse in mode-locked fiber lasers are analyzed theoretically. Experimentally the NOLM is placed in an actively mode-loked erbium-doped fibre ring laser to form a figure-eight actively and passively mode-locked fibre laser. 12 ps mode-locked pulses centered at 1.543 μm were obtained at the modulation frequency of 2.498749 GHz, with time-bandwidth product of 0.33. 3.715 mW output power is achieved with 50 mW pump power. Meanwhile, 2～4 rational harmonic (RH) mode-locked pulses with uniform amplitude were obtained at the modulation frequency of 2.499344 GHz, 2.499114 GHz, and 2.498999 GHz respectively.

关 键 词：光纤激光器 非线性光学环形镜 铒离子掺杂 主被动锁模 脉冲宽度 损耗系数 

分 类 号：TN248[电子电信—物理电子学] TN253