Abstract
We demonstrated the temporal loss increase of a butt-joint splice with refractive index matching material when using a high power light for optical fiber communication systems. The temporal degradation at the splice as a function of the high launched power arises from the refractive index change caused by the thermo-optic effect. We also proposed the design of a butt-joint splice for high power light by diffusing the heat. Our method reduced the loss increase by 2.3 dB for d= 100 µm and Pin = 1 W.
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