Open Access880-nm-Diode-Laser-End-Pumped Electrooptically Q-Switched Nd:YLF Laser With High Energy and Good Beam Quality at 1047 nm and 1 kHz
Author(s) -
Zilong Zhang,
Qiang Liu,
Mingming Nie,
Encai Ji,
Mali Gong
Publication year - 2016
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2016.2517134
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
An electrooptically Q-switched Nd:YLF laser end-pumped by an 880-nm laser diode with high energy and short pulsewidth at 1 kHz is demonstrated. The asymmetry of the focal lengths of thermal lens along the a-axis and c-axis is observed, and the cylindrical lens is used to compensate for the thermal lens effect along the a-axis. We experimentally studied the performance of the Nd:YLF laser with different combinations of the output coupler transmission T and the focal length f of cylindrical lens. With T = 40% and f = 300 mm, 9.5-mJ pulse energy, 9.5-ns pulsewidth, and beam quality factors of M2x = 1.74 andM2y = 1.97 are obtained. Moreover, the relationships between the pulse width and pump power as well as beam transverse mode were experimentally studied and discussed.