Experimental investigation of relation between mode-coupling and fiber characteristics in few-mode fibers

We experimentally clarify that relation between mode-coupling coefficient h and effective-index difference Δn
_eff
in few-mode fibers (FMFs) by impulse response technique and h in our fabricated FMFs with Δn
_eff
≥ 1.7 × 10
^-3
converges to 7.4×10
^-5
1/km.