Single-beam diode-laser technique for optical path-length measurements.
Single-beam diode-laser technique for optical path-length measurements.
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用于光程长度测量的单束二极管激光器技术。
DOI：
10.1364/ao.35.004349
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发表时间：
1996
期刊：
影响因子：
1.9
通讯作者：
H. Riris
中科院分区：
文献类型：
--
作者：
C. Carlisle;R. Warren;H. Riris
介绍了一种简单的单光束技术，该技术采用零差解调的可调谐半导体激光器的射频调制作为测量光程长度的一种手段。该技术提供了一种直接的方法，用于确定穿过光学多路单元的路径长度或在短(即，几十米)的对峙距离上执行光学测距。该技术的射频相敏特性允许窄带检测和高信噪比，即使在测距测量的距离分辨率为1米的情况下也是如此。这与传统的短脉冲、宽带光学测距仪相比是有利的。
A simple single-beam technique employing radio-frequency modulation of a tunable diode laser with homodyne demodulation is demonstrated as a means of measuring optical path lengths. This technique offers a straightforward method for determining path lengths traversed through optical multipass cells or performing optical range-finding over short (i.e., tens of meters) standoff distances. The radio-frequency phase-sensitive nature of the technique permits narrow-band detection and high signal-to-noise ratios, even when range-finding measurements are made with range resolutions of «1 m. This compares favorably with traditional short-pulse, wide-bandwidth optical range finders.