Jiang Xiaogang, Mao Barerem-Melgueba, Wei Yizhen, Chen Daru, She Lijuan, Feng Gaofeng, Yang Junyong
Appl Opt. 2018 Aug 10;57(23):6768-6771. doi: 10.1364/AO.57.006768.
A wavelength-tunable all-fiber mode-locked erbium-doped fiber laser has been proposed and realized by using a supermode interference filter (SMIF). The SMIF is fabricated by splicing a segment of seven-core fiber (SCF) to two standard single-mode fibers. Since two supermodes of the propagating light are excited in the SCF, the transmission spectrum of the SMIF shows a clean broadband comb-shape characteristic. By bending the SMIF in the proposed mode-locked laser, the output spectrum can be continuously tuned in a wavelength range up to 22 nm while keeping mode-locking operation. The self-starting laser produces 230 fs pulses with a spectral width of 14 nm.
一种波长可调谐的全光纤锁模掺铒光纤激光器已通过使用超模干涉滤波器（SMIF）被提出并实现。该超模干涉滤波器是通过将一段七芯光纤（SCF）与两根标准单模光纤熔接而成。由于在七芯光纤中激发了传播光的两个超模，超模干涉滤波器的传输光谱呈现出清晰的宽带梳状特性。在所提出的锁模激光器中，通过弯曲超模干涉滤波器，输出光谱可在高达22纳米的波长范围内连续调谐，同时保持锁模运行。该自启动激光器产生脉宽为230飞秒、光谱宽度为14纳米的脉冲。
