Q-switching-induced Gain-switched Erbium Pulse Laser System

摘要

The present invention relates to a Q-switching-induced gain-switched erbium pulse laser system, capable of generating erbium laser pulses within the 2.5 μm to 3.0 μm wavelength region, by means of Q-switching operation at 1.6 μm. At first, an Er³⁺-doped gain medium is pumped and Q-switched at the wavelength region from 1.58 μm to 1.62 μm, so that a Q-switched pulse is formed from the Er³⁺-doped gain medium. The Q-switched pulse results in an instant positive population inversion between the levels ⁴I_11/2 and ⁴I_13/2 of the Er³⁺-doped gain medium, followed by a gain-switched laser pulse at the wavelength region from 2.5 μm to 3.0 μm.