Open AccessSimulation on a new coupling method of laser diode array end-pumped large-aperture amplifiers
Author(s) -
Qinghua Deng,
Hansheng Peng,
Sui Zhan,
Lei Ding,
Mingzhong Li,
Jianjun Wang,
Jun Tang,
Yong Luo,
Hungyen Lin,
Rui Zhang,
Ying Deng,
Zhenhua Lü
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.6340
Subject(s) - amplifier , optics , duct (anatomy) , inscribed figure , coupling coefficient of resonators , coupling (piping) , aperture (computer memory) , diode , materials science , physics , optoelectronics , acoustics , geometry , medicine , mathematics , cmos , pathology , resonator , metallurgy
A new coupling method is put forward for high power LDA end-pumped large-aperture amplifiers. The LDA is inscribed on a sphere and then a duct is added adjacent to it. Three-dimensional ray-tracing program is used to simulate the features of the new coupling method. Simulation results show that when the area contraction coefficient is about 30, deposition efficiency in the gain media as high as 93.7% can be achieved; When the emitting area is not less than the aperture of the duct, uniform and top-hat distribution is obtained. When several stacks are spliced to make an inscribing area, amplifiers with larger aperture can be end pumped. When stacks in LDA is placed as m×n(m≠n) arrays, uniform and top-hat distribution is also obtained. In the LDA coupling experiment, the output is top-hat distributed at the end of the duct and the coupling efficiency is 85.4%.