Multi-core to 7 single-core-fibers fan-out device with multi-core fiber pigtail connector is demonstrated to apply various types of multi-core fiber based sensor. Fused taper type fan-out device and SC type multi-core fiber connector are separately fabricated on each process. The fan-out device and the pigtail multi-core fiber are spliced each other by a specialty fiber fusion splicer. Comparatively low average insertion loss of 0.95 dB and sufficiently low reflectivity of less than -60 dB are achieved.
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