Laser diodes semicircular side-pumped laser rod with a round-sharped output

✍ Scribed by Y. X. Guo; M. L. Gong; H. Z. Xue; C. Li; P. Yan; Q. Liu; G. Chen

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 136 KB
• Volume: 3
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200610019

✦ Synopsis

In order to keep the symmetric of the pump geometry and
obtain a low-level, high quality laser output, the temperature of
the side-pumped laser rod is more often be controlled by a water
cooling system than a conduction cooling system in the
diode-pumped solid-state lasers. But the use of the water cooling
system increases the volume and decreases the mobility. To solve
the confliction between the beam quality and the mobility of the
laser system, a novel, compact and all-solid design of the pump
structure is applied to the side-pumped laser system. The Nd:YAG
rod is pumped by semicircular mounted LD arrays in the pump
module, and two pump modules are working together to compensate
each other. Numerical calculation and experiment are performed,
the output laser has a round-sharped beam with a beam waist of
5 mm and a divergence angle less than 7 mrad, and a maxim output
pulse energy of 75.8 mJ is obtained under the working frequency of
20Hz, the slope efficiency is 35.8%.