Meanwhile extinction ratio of converted signal can be improved with low probe power, short probe wavelength, long cavity length, high confinement factor, and large biased current.
减小探测光输入功率，选取短波长探测光波长，增加半导体光放大器的腔长和模场限制因子以及大的偏置电流可提高转换光消光比；
The system allows metal tube, bar and wire to pass through the eddy current probe with variable high speed, and defects can be accurately located, marked and recorded.
该系统的特点是允许被测样品高速、变速通过涡流传感器，并能对缺陷进行准确定位、打标及记录。
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