The resolution of the laser interferometer is improved by using optical path difference doubling technique.

采用光程差放大技术，提高了干涉系统的分辨力。

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Spectral resolution of optical fiber Fourier transform spectrometer depends on maximum optical path difference (OPD).

光纤傅里叶变换光谱仪的光谱分辨率是由最大光程差决定的。

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The main polarization mode and coupling mode in PM fiber has some optical path difference because of internal birefringence.

保偏光纤内部的高双折射，使得其内部传播的偏振主模和耦合模之间存在着一定大小的光程差。

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Prepayment risk can be determined by many factors, such as the current and issued mortgage rate difference, housing turnover and path of mortgage rate.

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The difference between you being in the path of this twister and a few blocks away, you being okay, is a very slim, slim margin.

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Since the speed of light through a cable is consistent, the difference is entirely in the length of its path.

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