520 mJ langasite electro-optically Q-switched Cr, Tm, Ho:YAG laser.
A flash lamp pumped 2.09 μm Cr, Tm, Ho:YAG laser utilizing a self-grown La(3)Ga(5)SiO(14) crystal as the electro-optic Q-switch generator is proposed and demonstrated for the first time. Operating at 3 Hz repetition rate, 520 mJ pulse energy with 35 ns pulse width is achieved by optimizing the Q-switch delay time and compensating for the thermal depolarization with a quarter-wave plate. The corresponding peak power is 14.86 MW, and the Q-switched-to-normal-mode energy extraction efficiency is 66.3%. To our knowledge, this Q-switched giant pulse is the best result reported to date in 2.09 μm laser resonator.
Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
Li
L
Wang
Xuwu
X
Cai
Jingwei
J
Yang
Xianyou
X
Wu
Haihe
H
Jiang
Jiyang
J
Wang
D004560:Electricity; D053844:Lasers, Solid-State; D055620:Optical Phenomena; D017640:Silicates; D013997:Time Factors
C470742:La3Ga5SiO14; D017640:Silicates