Long wavelength semiconductor lasers are the important sources for the high capacity, long repeater spacing fiber-optic telecommunications.
2
无线通信系统按其传播信息的方式,可分为长波、中波、短波、超短波和微波通信方式。
From the mode of information transmission, the wireless communication can be classified as long wave, medium wave, shortwave, ultra short wave, and microwave.