the output beam quality 光束质量改善
The correlative experiments show that laser output beam quality becomes worse when the laser works longer.
实验验证了激光器输出光束质量随出光时间的延长而逐渐变坏。
Numerical simulation and experimental results show that the output beam quality can be improved taking a convex face as the output end of a fiber laser.
结果表明，采取凸端面作为光纤激光器的输出端可以提高输出激光的光束质量。
The experiment shows that the higher the pump power is, the smaller the thermal focal length is, and the worse the thermal effect influent the output beam quality.
实验结果表明，抽运功率越高，热焦距越小，热效应对输出光束质量影响越严重。
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