Q-switched induced gain switching of a two-transition cascade laser.
A gain-switched laser transition, of a two-laser-transition cascade laser, that is driven by the adjacent laser transition which is Q-switched is demonstrated using a Ho3+-doped fluoride fiber laser. Q-switching the 5I6 → 5I7 transition at 3.002 µm produces stable gain-switched pulses from the 5I7 → 5I8 transition at 2.074 µm; however, Q-switching the 5I7 → 5I8 transition produced multiple gain switched pulses from the 5I6 → 5I7 transition. The gain-switched pulses were measured to be of a similar duration to the Q-switched pulses suggesting that much shorter pulses of closer duration could be generated at pump power higher levels.
Institute of Photonics and Optical Science and the Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, Camperdown 2006, Australia. lijianfeng@uestc.edu.cn
Jianfeng
J
Li
Tomonori
T
Hu
Stuart D
SD
Jackson