A chirp grating is placed inside a multimode interference (MMI) structure to shorten the device length and increase wavelength tolerance.
为了缩短组件长度并增加波长变动容忍度，我们在多模干涉结构里面旋转一个周期渐变光栅。
2
Then by taking the regular square prism as an example, the machining error is analyzed, and the relationship among the length of the lathe tool, the work dimension and the tolerance is obtained.
以车削正四棱柱为例，进行了误差分析，得到了刀具长度与工件尺寸和容许误差间的关系。
3
The root length is main parameter of root architecture with various important functions such as nutrient uptake, drought tolerance and yield.