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A step-index 10-mode (6-LP-mode) fiber (10MF) with large effective index differences is fabricated and experimentally validated for weakly-coupled few-mode transmission. Modal crosstalk of less than −13.9 dB between 6-LP modes was achieved in an 81-km long 10MF with a pair of mode multiplexer and demultiplexer.
This paper presents an application of low-coherence interferometry for measurement of mode field diameters (MFDs) of a few-mode fiber and shows its performance compared with another method using a mode multiplexer.
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