摘要
以波导本征模式场作输入光场 ,阐述了AWG中实际光场的传输数学模型 ,对输入场作高斯近似 ,阐述了光场传输的简化模型 通过简化模型与实际情况的比较 ,肯定了高斯近似简化模型在一定情况下的合理性 对于给定串扰要求 ,利用高斯近似模型可以决定最外层阵列波导坐标与衍射场光束束腰的比值 ,对实际器件设计来说有一定意义 ,但高斯简化模型在一定情况会引入较大误差 。
The mathematical model of light propagation in arrayed waveguide grating is elicited based on original mode field in input waveguide. With the input light field approximated as Gauss field,a simplified Gauss propagation model is also elicited.By comparing with the real situation, the rationality of simplified Gauss model is proved. With a required out put cross-talk, using the Gauss simplified model, the ratio of the position of the outmost waveguide and the beam waist of diffracted field can be designed, so the light power in outermost arrayed waveguide can be decided, this Gauss simplified model provided a easy practicable way in AWG design but for more accurate design and simulation, the real light filed transfer model should be considered.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2004年第9期1072-1076,共5页
Acta Photonica Sinica
基金
浙江省自然基金资助项目 (6 0 1133)
关键词
阵列波导光栅
模场
高斯近似
串扰
Arrayed wave-guide grating
Mode field
Gauss approximation
Cross-talk
