As to step index DCF, we even obtain a simple analytic formula.
对于阶跃折射率双包层光纤，甚至还得到了一个简单的解析公式。
A simple method for measuring equivalent step index (ESI) parameters of the single mode fiber is presented.
本文叙述了单模光纤等效阶跃折射率(esi)参数测量的一种简便方法及其原理。
The step index profile optical waveguide is the fundamentals of all other optical waveguide devices theoretically.
阶跃折射率光波导在理论上是所有其它光波导器件的基础。
The results show that tea polyphenols can reduce the body fat, balance blood pressure and help increase lung capacity with little rise of step index.
结果表明，茶多酚可降低肥胖学生体脂含量、维持正常血压、提高肺活量，但对台阶指数的提高不甚明显。
Then the mode series of step index planar dielectric waveguide and circular optical fiber are studied, including propagation modes and radiation modes.
接着推导了阶跃折射率平面介质波导和圆光纤的正交模式——包括束缚模式和辐射模式。
In order to calculate the equivalent step index of the periodic structure of the cladding holey optical fiber, all-vectorial fundamental space filling mode approach was utilized.
为了计算周期结构包层多孔光纤的等效阶跃折射率，采用了全矢量基本空间充填模式法。
Then in analogy with the theory of step-index fibers, the effective index of the fundamental mode and the dispersion of PCF can be calculated simply.
然后通过用类似于阶跃折射率型光纤的理论，很容易计算出光子晶体光纤的基模模式折射率和色散。
Both mode coupling and mode distortion in the step-index fiber are studied theoretically in order to gain the effect of mode distortion on the beam quality.
为了研究模场畸变对于大模场光纤光束质量的影响，理论研究了阶跃光纤的模式耦合和模场畸变的特性。
Both mode coupling and mode distortion in the step-index fiber are studied theoretically in order to gain the effect of mode distortion on the beam quality.
为了研究模场畸变对于大模场光纤光束质量的影响，理论研究了阶跃光纤的模式耦合和模场畸变的特性。
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