Reflections from polished single mode fiber ends

摘要: Abstract When the end of a single mode fiber is polished and placed in an index-matching liquid, reflection will occur. Its amplitude depends on two factors: (1) difference between liquid's refractive index that fiber, (2) polishing procedure used. By proper choice both, end-reflection can be reduced to below −60 dB. well-polished ends are joined together with small, liquid-filled gap them, resulting coherent addition individual end-reflections. adjusting gap, this made greater than or less