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本文介绍了一种经改进的单模光纤偏移方法和在多模渐变型光纤中,选择模群激励的一种新的简便方法,并指出在芯轴缠绕滤模器后端发射倾斜平面波是一种在渐变型光纤中激励一定数量模群行之有效的方法。该方法不仅极为简便,而且还能使选择性得到改善。文章提供了实验结果。
In this paper, we introduce an improved single mode fiber migration method and a new simple method to select the mode group excitation in the multimode tapered fiber. It is pointed out that when the inclined plane wave is emitted at the back end of the mandrel winding filter, An effective method of exciting a certain number of modules in a tapered fiber. This method is not only extremely simple, but it also improves the selectivity. The article provides experimental results.