利用改进的有效折射率法，设计了一种能得到高效率的参量放大的色散平坦微结构光纤。
By way of using improved effective index method, we have designed a dispersion-flattened microstructure fiber to get high efficiency optical parametric amplification.
结果表明，有效折射率法有方法简明、结论确切的优点。
Results show that the method possesses the advantages of simplicity and exactness.
从导波的射线理论出发，导出了波导单模条件，运用有效折射率法完成了单模波导的优化设计。
Starting with waveguide ray theory, the condition for single-mode waveguide is derived, and design of single-mode strip waveguide is accomplished with effective index method.
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