Mansell J D, Hennawi J, Gustafson E K, Fejer M M, Byer R L, Clubley D, Yoshida S, Reitze D H
Appl Opt. 2001 Jan 20;40(3):366-74. doi: 10.1364/ao.40.000366.
We examine wave-front distortion caused by high-power lasers on transmissive optics using a Shack-Hartmann wave-front sensor. The coupling coefficient for a thermally aberrated Gaussian beam to the TEM(00) mode of a cavity was determined as a function of magnitude of the thermally induced aberration. One wave of thermally induced phase aberration between the Gaussian intensity peak and the 1/e(2) radius of the intensity profile reduces the power-coupling coefficient to the TEM(00) mode of the cavity to 4.5% with no compensation. With optimal focus compensation the power coupling is increased to 79%. The theoretical shape of the thermally induced optical phase aberration is compared with measurements made in a neutral-density filter glass, Faraday glass, and lithium niobate. The agreement between the theoretical and the measured thermal aberration profiles is within the rms wave-front measurement sensitivity of the Shack-Hartmann wave-front sensor, which is a few nanometers.
我们使用夏克-哈特曼波前传感器研究了高功率激光对透射光学元件造成的波前畸变。确定了热畸变高斯光束与腔的TEM(00)模式之间的耦合系数与热致像差大小的函数关系。在高斯强度峰值与强度分布的1/e(2)半径之间存在一波热致相位像差时，在无补偿情况下，到腔的TEM(00)模式的功率耦合系数降低至4.5%。通过最佳聚焦补偿，功率耦合提高到79%。将热致光学相位像差的理论形状与在中性密度滤光玻璃、法拉第玻璃和铌酸锂中进行的测量结果进行了比较。理论和测量的热像差轮廓之间的一致性在夏克-哈特曼波前传感器的均方根波前测量灵敏度（几纳米）范围内。
