The Pattern Design And Signal Simulation Of PCSS Based On Autocorrelation Measurement

With the development of science and technology, high-speed electronic devices and optoelectronic devices are developing very quickly. These high-speed devices have very broad bandwidth, which is far more than the capability of the pure electronic technology, so new measurements must be studied.This paper is designed in accordance with the purpose of developing ultrafast measurement. In it an ultrafast photoconductive switch is designed and fabricated with traditional lithography process and atomic force microscope (AFM) anode induced oxidation technology. An autocorrelation theory is studied and the photoconductive switch's autocorrelation measurement system is designed.The main contents of this paper include:1. Via summing up the previous analysis on the AFM oxidation experiment, the best experiment conditions were found to process titanium dioxide: 8V DC bias, 0.1μm / s scanning speed, and 30%~50% relative air humidity. In the given conditions, six titanium dioxide lines were made, all of which had good continuity and Uniformity.2. By comparing various common photoconductive materials, GaAs was chosen as the substrate of our photoconductive switches. And a good transmission lines pattern was designed to establish the autocorrelation measurement system.3. The principle of the autocorrelation measurement was analyzed, and its system was designed. The performance of the system was demonstrated.4. An equivalent circuit module of the photoconductive switch was explained, and the output of the signal generator and the sampling gate in the system were calculated respectively, and the waveform of each switch was simulated via MATLAB software.