Range-resolved interferometric signal processing using sinusoidal optical frequency modulation
Range-resolved interferometric signal processing using sinusoidal optical frequency modulation
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DOI：
10.1364/oe.23.009415
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发表时间：
2015-04-06
期刊：
影响因子：
3.8
通讯作者：
Tatam, Ralph P.
中科院分区：
文献类型：
--
作者：
Kissinger, Thomas;Charrett, Thomas O. H.;Tatam, Ralph P.
提出了一种新的信号处理技术，该技术利用廉价的连续波激光二极管光源的正弦光频率调制，允许在简单的自参考装置中进行高度线性干涉相位测量。这里，平滑窗函数的使用是在解调过程中抑制不想要的信号分量的关键。多个光程差不相等的干涉仪的信号可以被多路复用，与以往的工作相比，光程差是连续可变的，大大增加了该方案的实用性。文中介绍了该技术的原理，给出了利用三个多路干涉仪的实验实现，并对线性和抗仪器漂移的稳健性等量化问题进行了详细的研究。(C)2015年美国光学学会
A novel signal processing technique using sinusoidal optical frequency modulation of an inexpensive continuous-wave laser diode source is proposed that allows highly linear interferometric phase measurements in a simple, self-referencing setup. Here, the use of a smooth window function is key to suppress unwanted signal components in the demodulation process. Signals from several interferometers with unequal optical path differences can be multiplexed, and, in contrast to prior work, the optical path differences are continuously variable, greatly increasing the practicality of the scheme. In this paper, the theory of the technique is presented, an experimental implementation using three multiplexed interferometers is demonstrated, and detailed investigations quantifying issues such as linearity and robustness against instrument drift are performed. (C) 2015 Optical Society of America