作者
Fan Chen, Jun Ma, Rihong Zhu, Cong Wei
发表日期
2019/12/18
研讨会论文
AOPC 2019: Advanced Laser Materials and Laser Technology
卷号
11333
页码范围
7-13
出版商
SPIE
简介
In this paper, we demonstrate a spectral beam combining scheme of two ytterbium-doped fiber lasers, running at different wavelengths. An edge filter with high damage threshold (>20 MW/cm2 ) and steep rising edge (<2 nm) is employed as the combining element to overlap the two output beams in the near and far fields. 6.2 kW combined output power is achieved with an efficiency of 97%, which proves the high efficiency of the filter for both the reflection and transmission cases. Despite the broad emission spectrum of the single channel, the beam quality of the output is approximate with the incident emitters in horizontal and vertical directions. In terms of the measurement result conducted with thermal imaging camera, the growth of temperature on the edge filter during the combining process is well within the acceptable range. Compared with the grating based spectral beam combining (SBC) schemes, it permits …
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F Chen, J Ma, R Zhu, C Wei - AOPC 2019: Advanced Laser Materials and Laser …, 2019