The numerical and experimental results of this y-branch structure indicate that the proposed y-branch structure, without extra fabrication technologies, has a lower excess loss as compared with the conventional ones . optimal designs of the structural parameters for the multimode interference coupler are carried out . low loss and high uniformity of the multimode interference couplers are achieved when the waveguide is weakly guiding 研究了y分支耦合器中分支頂端間距(為工藝制作方便)帶來(lái)的附加損耗,提出了低損耗新型y分支耦合器結(jié)構(gòu),并給出了相關(guān)結(jié)構(gòu)參數(shù)的優(yōu)化設(shè)計(jì)方法,我們的理論計(jì)算和實(shí)驗(yàn)測(cè)試結(jié)果均表明,該新型結(jié)構(gòu)可以在常規(guī)光波導(dǎo)制作工藝下提高器件的指標(biāo)。
The numerical and experimental results of this y-branch structure indicate that the proposed y-branch structure, without extra fabrication technologies, has a lower excess loss as compared with the conventional ones . optimal designs of the structural parameters for the multimode interference coupler are carried out . low loss and high uniformity of the multimode interference couplers are achieved when the waveguide is weakly guiding 研究了y分支耦合器中分支頂端間距(為工藝制作方便)帶來(lái)的附加損耗,提出了低損耗新型y分支耦合器結(jié)構(gòu),并給出了相關(guān)結(jié)構(gòu)參數(shù)的優(yōu)化設(shè)計(jì)方法,我們的理論計(jì)算和實(shí)驗(yàn)測(cè)試結(jié)果均表明,該新型結(jié)構(gòu)可以在常規(guī)光波導(dǎo)制作工藝下提高器件的指標(biāo)。