Firstly, we find that NOLM has a function of compressing optical pulse width, self-phase modulation (SPM) in NOLMs is a crucial reason.
通过研究它的光学特性，我们发现，由于自相位调制(SPM)，NOLM有压缩光脉冲脉宽的功能。
But the resolving power of radar is in inverse proportion to the pulse-width. The pulse is the narrower in width , then the wider frequency spectrum is, it is the more accurate to find range.
但作用距离的分辨率却与发射脉宽成反比，脉冲宽度越窄，则频谱越宽，测距越精确。
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