80分求英文翻译！

来源：百度知道 编辑：UC知道 时间：2024/05/27 11:02:14
As the coupler is stretched further, the coupling coefficient increases and theovercoupling state is soon reached [15, 17]. Beyond this the optical power oscillates back and forth between the two coupler arms due to modal interference in the coupling region, i.e. mode coupling between the lower-order symmetric and anti-symmetric supermodes. Both theperiod and strength of the sinusoidal modulation in the transmission spectrum decreased as thewaist diameter was further decreased from 20 to 4m. Moreover, a slow modulation of the spectral envelope was also observed, which can be well explained by considering the different coupling properties of the device’s two polarization eigenstates [18, 19]. Finally, we note that for the 1.5m diameter MFC there was no higher-order mode cut-off (~1250nm) observed in the untapered input fiber; this is mainly due to the efficient mode filtering effect as describedin Ref. 9. The strength of oscillation is signif

为进一步延伸耦合，耦合系数的增加和theovercoupling国家尽快达成[ 15 ， 17 ] 。除了这个摇摆不定的光功率之间来回两个耦合武器由于模态干涉耦合区域，即模式之间的耦合较低阶对称和反对称supermodes 。这两个theperiod和力量正弦调制的透射谱下降thewaist直径为进一步减少到20米至4 此外，一个缓慢调制的频谱包络还指出，这可以很好地解释了考虑不同性质的耦合装置的两个偏振本征态[ 18 ， 19 ] 。最后，我们注意到，为1.5 米直径的MFC没有高阶模式停产（ 〜 1250nm ）中观察untapered输入纤维;这主要是由于有效模式过滤效果describedin编号。 9 。振荡的强度显着下降，总光学超过lossis微不足道（超额亏损“ 0.1分贝在 = 1.55 米） 。增加多余的损失（ 〜三点三分贝）观察到的多谱区“ （ < 1250nm ）由于过滤效果高阶模式的输入纤维。