TM-pass polarizer based on multilayer graphene polymer waveguide

A TM-pass polarizer based on multilayer graphene polymer waveguide is proposed and theoretically analyzed.The mode properties,the extinction ratio,the insertion loss and the bandwidth are also discussed.The results show that a TM-pass polarizer,which only guides the TM mode,can be achieved by multilayer graphene polymer waveguide.With length of 150μm,the proposed polarizer can achieve extinction ratio of 33 dB and insertion loss of 0.5 d B at optical wavelength of 1.55μm.This device has an excellent performance,including large extinction ratio and low insertion loss within the spectral range from 1.45μm to 1.6μm.

航空气象服务的可视化系统

本文通过利用常规的气象资料和NCEP预报场资料，利用物理量计算、诊断、分析等方法，建立二维和五维的可视化系统，对航路上的风场、温度场、重要天气区域等进行水平、垂直高度上的剖面，并对资料进行五维图形的显示，以提供丰富的航路气象资料。同时对航路上气象条件进行燃油消耗的评估，讨论其在飞行计划中的应用价值，探索安全条件下的气象经济飞行。