coupled length meaning in English

带管接头的长度

It is shown that the coupling length for such a waveguide system can be shortened significantly by putting a lhm layer since the lhm can amplify evanescent waves
理论分析表明，由于负折射介质能放大倏失波，它可以有效地增强二波导间的藕合作用。
In the paper , some factors are studied such as ratio of soliton and signal wavelength , linear refractive - index of media and coupling length which have influence on the performance of the steerable all - optical directional coupler
研究了孤子波和信号光波长之比、器件长度及介质的线性折射率对光控可变定向耦合器性能的影响。