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利用线性调频对光强进行调制，是一种兼有脉冲和单频调制优点的一种新的激光强度调制技术。它的自相关函数更接近于δ函数，因此，它比 相关无声检测中常用的伪随机噪声编码调制，具有更宽的频谱，是一种进 行物质光学、热学和力学性质快速检测的良好方法。本文将简述该技术的 基本原理，实验装置及初步实验结果。本工作得到国家自然科学基金的资助。
The use of chirp to modulate the light intensity is a new laser intensity modulation technique that combines the advantages of both pulse and single frequency modulation. Its autocorrelation function is closer to the delta function, so it has a wider frequency spectrum than the pseudo-random noise code modulation commonly used in correlated silence detection, which is a good method for rapid detection of material optical, thermal and mechanical properties. This article will outline the basic principles of the technology, experimental devices and preliminary experimental results. This work has been funded by the National Natural Science Foundation.