摘要
用多模干涉原理分析和设计了光通信波长(1.30μm~1.55μm)的Si1-xGex/Si滤波器,并用模的传播分析方法对其传输特性进行了研究。结果发现,在Ge含量x=0.04时,干涉区的脊高和宽度分别为6.35μm和8μm。如果多模干涉区长度LM=2302.5μm,可滤1.30μm而通1.55μm的波长。且具有31dB的对比度和0.01dB的插入损耗;如果多模干涉区长度LM=2512.5μm,可滤1.55μm而通1.30μm的波长。具有16dB的对比度和0.09dB的插入损耗。
A systematical analysis and design have been made for 1.30 μm/1.55 μm Si 1-x Ge x/ Si filters based on multi mode interference. Using the mode propagation analysis, transmission characteristics of the device were investigated. The results show that: 1) for 1.30 μm filter, the optimum coupler length is 2302.5 μm, and the contrast and insertion loss are 31 dB and 0.01 dB, respectively; 2) for 1.55 μm filter, the optimum coupler length is 2512.5 μm, and the contrast and insertion loss are 16 dB and 0.09 dB, respectively. For both of the filters, the Ge content x, rib height, and interfernce width are 0.04, 6.35 μm, and 8 μm, respectively.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1998年第11期1508-1512,共5页
Acta Optica Sinica
基金
国家自然科学基金