Institute of Scientific Instruments of the ASCR, Kralovopolska 147, 612 64 Brno, Czech Republic.
Sensors (Basel). 2012 Oct 19;12(10):14095-112. doi: 10.3390/s121014095.
We have proposed an approach to the interference phase extraction in the homodyne laser interferometry. The method employs a series of computational steps to reconstruct the signals for quadrature detection from an interference signal from a non-polarising interferometer sampled by a simple photodetector. The complexity trade-off is the use of laser beam with frequency modulation capability. It is analytically derived and its validity and performance is experimentally verified. The method has proven to be a feasible alternative for the traditional homodyne detection since it performs with comparable accuracy, especially where the optical setup complexity is principal issue and the modulation of laser beam is not a heavy burden (e.g., in multi-axis sensor or laser diode based systems).
我们提出了一种在零差激光干涉测量中提取干涉相位的方法。该方法采用一系列计算步骤，从非偏振干涉仪的干涉信号中重建信号，该干涉信号由简单光电探测器进行采样。这种方法的复杂性在于使用具有频率调制能力的激光束。我们对其进行了理论推导，并通过实验验证了其有效性和性能。该方法已被证明是传统零差检测的一种可行替代方法，因为它具有相当的准确性，特别是在光学设置复杂性是主要问题且激光束的调制不是一个沉重负担的情况下（例如，在多轴传感器或基于激光二极管的系统中）。
