The FM-1 Fiber Mode Scrambler produces a stable mode distribution in a fiber and low insertion loss regardless of the light launch conditions. This condition is important when making accurate measurements of properties and losses due to fiber components. Its precision mechanism gently presses the fiber between specially designed corrugated surfaces to cause micro bending of the fiber. This dramatically increases mode coupling among guided modes (known as mode scrambling) and coupling of high-order guided modes to radiation modes (mode filtering). The distribution of power among the modes is then independent of the launch conditions of the light, simulating the distribution achieved after the light has traveled through several kilometers of fiber. The fiber is placed in an easily accessible slot. A knob controls the pressure applied to the fiber until the desired output distribution is achieved. Tests have shown that losses introduced are negligible regardless of launch condition. A graduated scale assures that the fiber may be removed and replaced and the pressure reset with high repeatability.

• 类型

  Mode Scrambler

• 包层直径

  Standard Acrylate Jackets 250um, Not Cabled Yarn 2.2mm

FM-1光纤模式扰码器在光纤中产生稳定的模式分布和低插入损耗，而不受光发射条件的影响。当准确测量由于纤维成分造成的性能和损耗时，这种情况是很重要的。它的精密机构轻轻挤压纤维之间的特殊设计波纹表面，造成纤维的微弯曲。这大大增加了导模之间的模态耦合(称为模态置乱)和高阶导模态与辐射模态的耦合(模态滤波)。然后，模式之间的功率分布与光的发射条件无关，模拟光经过数公里光纤后的分布情况。纤维被放置在一个容易接近的槽中。一个旋钮控制施加在纤维上的压力，直到达到预期的输出分布。试验表明，无论发射条件如何，所引入的损失都是可以忽略不计的。刻度刻度保证纤维可以被移除和更换，压力复位具有高重复性。