CAJ | 학술논문

本文对具有Kerr非线性包层和线性匀芯的光纤在不同光功率下的传播特性进行了理论分析和数值计算.结果表明，在适当光功率下，当模折射率N等于芯折射率nf时，芯场变得相当均匀，而包层场迅速衰减.对于自聚焦包层，当从N＜nf逐渐变到N＞nf时，芯场剖面越过N＝nf从凸变凹.在拐点，芯场成为均匀的.论文给出了模场分布和光功率与模折射率的关系.指出纤芯出现匀场预期会在光纤器件、光电子器件、光子器件中得到应用.
본문대구유Kerr비선성포층화선성균심적광섬재불동광공솔하적전파특성진행료이론분석화수치계산.결과표명，재괄당광공솔하，당모절사솔N등우심절사솔nf시，심장변득상당균균，이포층장신속쇠감.대우자취초포층，당종N＜nf축점변도N＞nf시，심장부면월과N＝nf종철변요.재괴점，심장성위균균적.논문급출료모장분포화광공솔여모절사솔적관계.지출섬심출현균장예기회재광섬기건、광전자기건、광자기건중득도응용.
Theoretical analysis and numerical calculations are carried out for propagationchracteristics of TE0 modes in a fiber with a Kerr-type nonlinear cladding and a linear uniform core at different values of optical power.It is shown that at an appropriate optical power,when the modal index N equals to the refractive index of core nf,the core field becomes uniform while the cladding field decay rapidly.For self-focusing claddings,when the modal index N increases gradually from N＜nf to N＞nf,the core field profile changes from convex to concave across N＝nf.At the turning point,the core field is uniform.Modal field distributions and relations between optical power and modal index are given.It is notified that the occurrence of a uniform field in a fiber core may perhaps have prospective applications in optical fiber devices,opto-electronic and photonic devices.