Zhao Haichuan, Wang Xiaolin, Ma Haotong, Zhou Pu, Ma Yanxing, Xu Xiaojun, Zhao Yijun
College of Opto-Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan, China.
Appl Opt. 2011 Aug 1;50(22):4389-92. doi: 10.1364/AO.50.004389.
We present a new method for efficiently transforming a high-order mode beam into a nearly Gaussian beam with much higher beam quality. The method is based on modulation of phases of different lobes by stochastic parallel gradient descent algorithm and coherent addition after phase flattening. We demonstrate the method by transforming an LP11 mode into a nearly Gaussian beam. The experimental results reveal that the power in the diffraction-limited bucket in the far field is increased by more than a factor of 1.5.
我们提出了一种新方法，可有效地将高阶模光束转换为具有更高光束质量的近高斯光束。该方法基于通过随机并行梯度下降算法调制不同瓣的相位，并在相位平坦化后进行相干叠加。我们通过将LP11模转换为近高斯光束来演示该方法。实验结果表明，远场中衍射极限桶内的功率增加了超过1.5倍。
