Smith W L, Degroot A J, Weber M J
Appl Opt. 1978 Dec 15;17(24):3938-44. doi: 10.1364/AO.17.003938.
A silicon-target vidicon and minicomputer system providing rapid recording, readout, and processing of laser beam intensity profiles is described. Results are presented for 150-psec, 1064-nm neodymium laser pulses. Use of a thick, neutron-transmutation-doped silicon target reduced spatial sensitivity nonuniformities and coherent interference modulation. Modifications of commercial cameras to provide linearized output and timing control are described. The vidicon signal is recorded in a video disk recorder, digitized, and stored on a magnetic disk. Selected 1-D profiles and color isointensity whole beam profiles are available on CRT displays. Using a PDP-11 computer, the beam is analyzed to yield a peak energy flux within 100 sec after the laser pulse. The performance of the vidicon system is compared with photographic film techniques. Results show a sensitivity uniformity of succeeds, equals93% peak to peak over a target distance of 9.6 mm, linear dynamic range of greater, similar20, and absolute flux agreement within +/-10%. The system is useful for other laser wavelengths and pulse durations as well as for nonlaser applications.
本文描述了一种硅靶光导摄像管和小型计算机系统，该系统可对激光束强度分布进行快速记录、读出和处理。给出了150皮秒、1064纳米钕激光脉冲的相关结果。使用厚的、中子嬗变掺杂的硅靶可降低空间灵敏度不均匀性和相干干涉调制。介绍了对商用相机进行改装以实现线性化输出和定时控制的方法。光导摄像管信号被记录在视频磁盘记录器中，数字化后存储在磁盘上。在阴极射线管显示器上可获得选定的一维分布和彩色等强度全光束分布。使用PDP - 11计算机，在激光脉冲后100秒内对光束进行分析，以得出峰值能量通量。将光导摄像管系统的性能与摄影胶片技术进行了比较。结果表明，在9.6毫米的靶距离上，灵敏度均匀性在峰峰值之间达到93%，线性动态范围大于20，绝对通量一致性在±10%以内。该系统也可用于其他激光波长和脉冲持续时间以及非激光应用。
