Stable high-energy Q-switched resonantly diode-pumped Er:YAG laser at 1645 nm.
We demonstrate the generation of a stable high-energy Q-switched resonantly diode-pumped Er:YAG laser at 1645 nm in passive and active operation modes. For the passively Q-switched Er:YAG laser, the bi-layer graphene saturable absorber (SA), which was transferred onto the highly reflective cavity mirror by an improved method, was applied to deliver a stable pulse train with per-pulse energy of about 0.1 mJ. While in the active operation mode, the voltage-ON-type rubidium titanyl phosphate (RTP) Pockels cell as an electro-optic (EO) Q-switcher allows for the generation of a stable Q-switched pulse with per-pulse energy of up to 7.5 mJ. Our work may provide a basis for the development of a high-energy Er:YAG laser at 1645 nm to fulfill specific applications.
Pinghua
P
Tang
Rong
R
Zhou
Chujun
C
Zhao
Changwen
C
Xu
Jun
J
Liu
Han
H
Zhang
Deyuan
D
Shen
Shuangchun
S
Wen