中国激光, 2019, 46 (7): 0701007, 网络出版: 2019-07-11
L波段可切换双波长被动锁模光纤激光器 下载: 1316次封面文章
L-Band Switchable Dual-Wavelength Passively Mode-Locked Fiber Laser
激光器 锁模光纤激光器 波长可切换 双波长 L波段 lasers mode-locked fiber laser wavelength switchable dual-wavelength L-band
摘要
报道了基于碳纳米管饱和吸收体(CNT-SA)的L波段可切换双波长被动锁模光纤激光器。通过调节抽运功率,该激光器光谱的中心波长可以在1572.9 nm和1596.6 nm之间切换,对应的3 dB光谱宽度分别为3.68 nm和2.34 nm,脉冲宽度均为1.80 ps。此外,双波长锁模光谱的中心波长为1572.3 nm和1597.1 nm,两个波长的间隔为24.8 nm。同时,对L波段可切换双波长锁模光纤激光器的形成和演化进行了数值研究。数值模拟结果与实验观察结果吻合,表明可切换双波长锁模的成因是增益光纤透射光谱的变化。
Abstract
An L-band switchable dual-wavelength passively mode-locked fiber laser based on a carbon-nanotube saturable absorber is reported herein. The central wavelength of the fiber laser spectrum can switch between 1572.9 nm and 1596.6 nm with a pulse width of 1.80 ps by tuning the pump power; the corresponding 3-dB spectral widths of the two wavelengths are 3.68 nm and 2.34 nm, respectively. Additionally, the dual-wavelength mode-locked fiber laser has a wavelength separation of ~24.8 nm, with two central wavelengths of 1572.3 nm and 1597.1 nm, respectively. A numerical study is conducted on the formation and evolution of the L-band switchable dual-wavelength mode-locked fiber laser. The numerical results are in good agreement with the experimental observations, indicating that the switchable dual-wavelength mode-lock can be attributed to the change in the transmission spectrum of the gain fiber.
刘奂奂, 蒋巧, 宋伟, 喻叶, 李子龙, 庞拂飞. L波段可切换双波长被动锁模光纤激光器[J]. 中国激光, 2019, 46(7): 0701007. Huanhuan Liu, Qiao Jiang, Wei Song, Ye Yu, Zilong Li, Fufei Pang. L-Band Switchable Dual-Wavelength Passively Mode-Locked Fiber Laser[J]. Chinese Journal of Lasers, 2019, 46(7): 0701007.