Based on that, a new type structure with the cascaded variable delay interval OFDL unit is brought up.

在此基础上，提出了一种级联非等延迟单元的新型结构形式。

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The OFDL which has high precision, small size and high dynamic range is urgently needed in the field of application.

高精度、小体积、大动态范围的光纤延迟线成为现今应用领域急需突破的关键技术。

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