CAJ | 학술논문

分析了包层及衬底均为非线性Kerr型介质、芯区为线性均匀介质的三层平板波导的TE0模特性．理论分析及典型实例计算表明：对于自聚焦情况，模折射率增大时，芯区场的极大值逐渐减小，对于一定的光功率，模折射率与芯区折射率相等时，芯区的场分布呈均匀的“平台形”分布，而两侧场则迅速衰减；模折射率继续增大时，场分布的极值进入芯区两侧，而芯区场分布呈下凹形．给出了自聚焦对称三层平板波导TE0模的场分布曲线，功率随模折射率变化曲线及芯区功率与总功率之比随总功率的变化曲线．还计算了自散焦情况下的场分布及功率变化，在一定条件下，芯区也会出现等振幅分布．
분석료포층급츤저균위비선성Kerr형개질、심구위선성균균개질적삼층평판파도적TE0모특성．이론분석급전형실례계산표명：대우자취초정황，모절사솔증대시，심구장적겁대치축점감소，대우일정적광공솔，모절사솔여심구절사솔상등시，심구적장분포정균균적“평태형”분포，이량측장칙신속쇠감；모절사솔계속증대시，장분포적겁치진입심구량측，이심구장분포정하요형．급출료자취초대칭삼층평판파도TE0모적장분포곡선，공솔수모절사솔변화곡선급심구공솔여총공솔지비수총공솔적변화곡선．환계산료자산초정황하적장분포급공솔변화，재일정조건하，심구야회출현등진폭분포．
The characteristics of TE0 modes in a waveguide with two identical Kerr type nonlinear claddings and a linear uniform core are analyzed. Both theoretical analysis and numerical examples give the same results. For the focusing case,with increasing modal refractive index, the maximum value of core field gradually decreases. At a definite optical power, when the modal refractive index at the core-cladding interface is equal to refractive index of core, the core field becomes uniformly 'platform-like', while the cladding field rapidly reduces. As the modal refractive index continually increases, the maximum field enters into the two claddings,while the field profile in the core changes to concave. Curves (focusing and defocusing cases) are given for field distributions, relations between modal index and power,ratio of core power to total power versus total power, relations between 'platform'height and core index, relations between 'platform' and core width, and so on.