By use of finite-difference time-domain(FDTD)method,an eignmode analysis in a multiwaveguide structure is presented.Because of difference in propagation constan
An amorphous silicon 16-bit array photodetector with the a-SiC/a-Si heterojunction diode is presented.The fabrication processes of the device were studied syste
Digital TV(DTV)video signal transmission over ATM network is emphasized on.Some important problems are introduced about TV video signals asynchronous transfer t
A monolithic clock-recovery circuit used in 622Mb/s optical communication system is designed,which is based on the phase-locked loop theory,,and uses bipolar tr
A emthod of 2-D Fourier transform used in 3-D surface profilometry is proposed,analyzed and compared with 1-D Fourier transform method in theory and practical m
The photovoltage spectra of AlGaAs/GaAs multiple quantum wells at different vacuum have been measured and the vacuum sensitivity of photovoltage in reported.The
A conduction channel model is propsed to explain the high conductivity property of nc-Si:H.Detailed energy band diagram is developed based on the analysis and c