山东高价收购电容 进口库存IC回收中心
F-P(法布里-珀罗)腔LD已成为常规产品,向高可靠低价化方向发展。DFB-LD的激射波长主要由器件内部制备的微小折射光栅周期决定,依赖沿整个有源层等间隔分布反射的皱褶波纹状结构光栅进行工作。DFB-LD两边为不同材料或不同组分的半导体晶层,一般制作在量子阱QW有源层附近的光波导区。这种波纹状结构使光波导区的折射率呈周期性分布,其作用就像一个谐振控,波长选择机构是光栅。利用QW材料尺寸效应和DFB光栅的选模作用,所激射出的光的谱线很宽,在高速率调制下可动态单纵模输出。内置调制器的DFB-LD满足光发射机小型、低功耗的要求。
山东高价收购电容 进口库存IC回收中心
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