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。
The system can be divided by function into three parts: image collection, DSP image compressing and image transmitting in PSTN.
本系统从功能上分为图像采集、DSP图像压缩以及PSTN图像传输三部分。
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