Gain-switching and gain-switched mode-locking operation of a Tm/Ho co-doped fiber laser

摘要

Pumped by a 1550 nm fiber laser, a gain-switched Tm/Ho co-doped single-clad fiber laser is built with a linear cavity. Stable gain-switching is achieved with the repetition rate ranging from 2 to 150 kHz. The highest peak power is 11.1 W with a pulse duration of 130 ns. Increasing the pulse energy of the pump, gain-switched mode-locking is attained with a sub-pulse repetition rate of 20 MHz and a pulse duration of about 10 ns; the peak power of the gain-switched envelope is about 4.6 W.