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1·After the simulation, the relationship of fundamental mode loss with the core index, wavelength and the diameter of cladding air holes is given.

通过模拟，给出基模损耗同芯折射率、光波长和包层空气孔直径之间的一般规律。

2·The influence of laser power, scanning speed, powder feed rate, spot diameter and preheating on the temperature of molten pool were revealed in the process of single-pass cladding.

在单道熔覆中通过跟踪测量研究了激光功率、扫描速度、送粉速率、光斑直径和基体预热温度对熔池温度的影响规律。

3·Moreover, with the decrease of the cone waist diameter, more cladding modes are excited, and more interference peaks with enhanced intensity are observed.

锥腰直径减小，激发更多包层模，干涉峰个数增多，强度提升；