抽运光分布对二极管抽运激光器振荡光光束质量的影响

研究了二极管抽运激光器（DPL）中抽运光的空间分布对振荡光光束质量的影响.通过对端面 抽运情形下光场运动方程的研究，发现不均匀的空间增益分布会影响激光振荡的模式，并且 使得基模振荡光偏离高斯分布.引入一个称之为抽运光影响因子参数，来判断这种影响的程 度.研究表明，这个参数计算方便而且实用.在对基模调Q脉冲激光的研究中发现，由于抽运 光的影响，脉冲前沿的场分布将由远离高斯分布向接近高斯分布变化，称之为脉冲前沿的场 倏变现象. 关键词： 激光二极管 二极管抽运激光器 光束质量

Effect of the pump light on the beam quality of the diode pumped laser

Effect of the pump light on the quality of diode pumped laser (DPL) has been discussed. Based on the end pump system, the equation of the laser field has been studied, which shows that the distribution of the laser gain can affect the laser mode and make the base mode of the laser to drift off from the Gauss distribution. A factor is proposed to estimate the scale of the affection, which is called affection factor of pump light. Calculations on the end pump laser prove that the factor is practical and convenient. Study on the Q switched laser show that the field distribution of the pulse is also affected by the distribution of the pump beam. The rising edge of the pulse usually evolves from far to near gauss distribution. The phenomenon is called as the field evolution of the pulse rising edge.