Influence of spherical aberrations on fundamental mode beam quality under different laser resonators |
| |
Authors: | Xiang Zhen Hu Miao Ge Jian-Hong Zhao Zhi-Gang Wang Sh Liu Chong and Chen Jun |
| |
Institution: | State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China; College of Communication, Hangzhou University of Electronic Science and Technology, Hangzhou 310037, China |
| |
Abstract: | Spherical aberrations of the thermal lens of the active media are severe
when solid state lasers are strongly pumped. The fundamental mode
profile deteriorates due to the aberrations. Self-consistent
modes of a resonator with aberrations are calculated by using the
Fox--Li diffraction iterative algorithm. Calculation results show
that the aberration induced fundamental mode beam quality
deterioration depends greatly on the resonator design. The tolerance
of a flat--flat resonator to the aberration coefficient is about
30$\lambda $ in the middle of stability, where $\lambda $ is the
wavelength of laser beam. But for a dynamically stable resonator,
2$\lambda $ of spherical aberration will create diffraction loss of
more than 40{\%}, if inappropriate design criteria are used. A
birefringence compensated laser resonator with two Nd:YAG rods is
experimentally studied. The experimental data are in quite good
agreement with simulation results. |
| |
Keywords: | spherical aberration fundamental mode beam quality diffraction loss resonators design |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|