Backwater is a main influential factor of the effective cavitylength, almost a decisive one sometimes.
空腔回水是制约有效空腔长度的一个主要因素，有时甚至是决定性因素。
2
The efficient cavitylength of vertical cavity semiconductor optical amplifier (VCSOA) is calculated with the theory of phase penetrating.
同时，利用相位渗透理论，数值计算了垂直腔半导体光放大器（VCSOA）中的有效腔长。
3
Based on the random variation of cavitylength, characteristics of the medium index and mode competition effect, low-frequency beat and noise continuums are explained.