We propose a new type of all-fiber mode scrambler for mode division multiplexed data transmission based on few mode fibers. By randomly placing multiple point-loads along the fiber length, low loss and wideband mode coupling is obtained amongst all the guided modes. The effect of mode coupling is simulated from a single point-load to multiple point-loads with a specific focus on the insertion loss and wavelength dependence. In an exemplar experimental demonstration we present a mode scrambler for step-index two mode fibers incorporating 150 randomly located point-loads. Uniform mode coupling is achieved over the C band with an insertion loss of less than 1 dB.

中文翻译：

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基于分布式多点负载的少模光纤宽带低损耗模式扰码器

我们提出了一种基于少模光纤的新型全光纤模式扰码器，用于模分复用数据传输。通过沿光纤长度随机放置多个点负载，可以在所有导模中获得低损耗和宽带模式耦合。从单点负载到多点负载模拟模式耦合的影响，特别关注插入损耗和波长相关性。在一个示例性实验演示中，我们展示了一种用于阶跃指数双模光纤的模式扰码器，其中包含 150 个随机定位的点负载。在 C 波段上实现了均匀模式耦合，插入损耗小于 1 dB。