2 method to measure principal modes in a four-mo"/>
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Detection of Principal Modes in Few-Mode Fibers by S2 Method

Zixiang Di,Zhiqun Yang,Yaping Liu,Guanju Peng,Lin Zhang,Guifang Li

2019 Asia Communications and Photonics Conference (ACP)（2019）

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Abstract
We propose to use S 2 method to measure principal modes in a four-mode fiber, with in-range frequency invariance. Simulation shows that principal modes' field distributions and differential mode group delay can be effectively extracted.
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Key words
few-mode fibers,four-mode fiber,in-range frequency invariance,differential mode group delay,principal mode detection,S2 method,principal modes field distributions
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