Chinese Optics Letters, 2019, 17 (5): 051405, Published Online: May. 20, 2019
Highly efficient electro-optically Q -switched 473 nm blue laser
140.3540 Lasers, Q-switched 140.3515 Lasers, frequency doubled 140.3530 Lasers, neodymium 140.3480 Lasers, diode-pumped
Abstract
An external frequency doubling electro-optically Q -switched neodymium-doped yttrium aluminum garnet (Nd:YAG) 473 nm blue laser was demonstrated. With absorbed pump energy of 48 mJ at 100 Hz repetition rate, about 2 mJ of 473 nm blue laser pulse energy was achieved by cascade frequency doubling. The second harmonic conversion efficiency was 64.5%, and overall optical-optical efficiency was 4.2%, respectively. The blue laser pulse width was less than 10 ns, and beam quality factor was less than 2.4.
Tingting Lu, Jian Ma, Xiaolei Zhu, Weibiao Chen. Highly efficient electro-optically