求翻译：为了在光纤光栅匹配解调系统中实现对光纤光栅微弱信号的检测与处理，在应用微弱光电信号检测原理的基础上设计一种高信噪比高检测精度的解调电路，该解调电路在光纤光栅匹配解调系统中具有很高的信噪比和测量精度，且具有很好的灵敏度，在测量低频率振动信号试验中具有优异的性能。实验表明该电路解调系统在25～200HZ正弦激励振动信号下具有很好的低噪声性能，能精确的测试出振动信号。是什么意思？

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