The coupling between butt fiber and cone lensed fiber is described in this paper. A theoretical model is presented and the formula of coupling efficiency is given.
建立了平端光纤与锥端微透镜光纤对耦合的理论模型，得到耦合系数的计算公式。
A simplified theoretical model of double-cladding fiber laser is presented.
提出了双包层光纤激光器简化的理论模型。
A cell theory of nematic liquid crystals is presented, which provides a calculable theoretical model for investigation of molecular short-range correlations.
本文提出了向列型液晶的格胞理论，为研究分子短程关联提供一个可计算的理论模型。
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