大功率多波长可转换双包层光纤激光器

在多模掺镱双包层光纤上,利用相位掩模法直接写制Bragg光栅作为激光器后腔镜,得到多波长激光输出.在室温下,通过调节偏振控制器可以得到稳定的单波长及多波长的激光输出,输出波长范围在1 056～1 061 nm,线宽均小于0.02 nm.在25 W的976 nm激光泵浦下,激光器得到功率为6 W的多波长输出.

High Power Switchable Multi-wavelength Double-clad Fiber Laser

A switchable multi-wavelength double-clad fiber laser was demonstrated.Using a phase mask,the fiber Bragg gratings directly in a multimode double-clad Yb3+-doped fiber were fabricated as the frequency selective mirror.The single-dual-triple- and four wavelengths output respectively through adjusting the polarization controller were obtained.The wavelength is between 1 056 nm to 1 060 nm and linewidth is less than 0.1 nm.Under a 25 W pump power of 976 nm laser,the maximum output power of the laser is above 6 W in multi-wavelength.