基于啁啾光纤光栅的五波长掺铒光纤激光器

提出并实验验证了一种新型的基于啁啾光纤光栅的全光纤的可切换的五波长掺铒光纤激光器,该激光器采用简洁的线性腔结构,使用一段高掺铒的光纤作为增益介质,利用一个内含宽带啁啾光纤光栅的萨格纳克环作为激光器的谐振腔腔镜,担当了一个梳状滤波器的作用,另一个腔镜由一个宽带光纤反射镜担当,适当调整环中的偏振控制器,可以获得最多五波长的激光输出,并具有4种不同的激光输出模式,所有激发线均具有大于32 dB的光学信噪比,小于0.6 nm的线宽以及小于8 dB的峰值功率差异。

Quintuple-wavelength erbium-doped fiber laser based on chirped fiber grating

A novel all-fiber and switchable quintuple-wavelength erbium-doped fiber laser based on a chirped fiber grating was proposed and demonstrated experimentally.The laser used simple linear cavity structure.A length of highly-doped erbium fiber was used as gain medium.A Sagnac loop with a wide-band chirped fiber grating was used as the cavity mirror of resonant cavity,which acted as a comb filter.Another cavity mirror acted as wide-band fiber reflective mirror.Through properly adjusting polarization controller in the loop,maximum quintuple-wavelength laser output and four kinds of different laser output modes can be obtained.All excitation lines have optical SNR greater than 32 dB,line width less than 0.6 nm and peak power difference less than 8 dB.