飞秒激光干涉场用于数字全息记录的分析
首发时间:2013-03-07
摘要:本文通过计算机模拟研究了具有时域和空域高斯分布的飞秒激光脉冲的干涉场及其在飞秒数字全息技术中的应用。根据高斯脉冲的数学形式构建了两光束干涉的模型,并通过计算得到了二维干涉场的分布。在此基础之上,基于像面数字全息技术的原理,模拟了不同光束夹角下具有Peaks相位分布的物体的数字全息记录,得到了全息图并对其进行了相位重构。通过将再现相位与原始相位值得统计及对比,阐明了飞秒数字全息记录能力受到物光参考光夹角限制即随着物光参考光夹角的增大飞秒激光全息图记录面积及再现相位的统计特性下降的现象。
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Interference of femtosecond laser pulse and its useage in digital holography
Abstract:In this paper, interference field and holographic recording of Gaussian femtosecond laser pulses were studied. The interference model of femtosecond laser pulses was based on its mathmatical expression and interference field was simulated by computation. By inserting a Peaks phase object in normal incidence beam and changing the beam angle, a set of holograms were generated. Those holograms were reconstructed by digital holographic method and the reconstructed phase maps were derived. By comparing the reconstructed phase with original input phase, a phenomenon was revealed that with the beams angle increases, the femtosecond laser hologram recording area becomes smaller and the reconstructed phase shows poor statistical properties.
Keywords: Optics Femtosecond laser pulses Interference Digital holography
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