Pulse-repetition Rate Multiplication Research In All-pass System

Ultra-short pulse technology is widely used in physics, chemistry, biology, optoelectronics and laser spectroscopy and other disciplines, so that the study of microscopic world and new-ultrafast process about these disciplines has made new progress. Ultra-short pulse technology provides a new experimental method in extreme physical conditions for researchers, and it has a positive and meaningful impact to the laws of natural science and social law of human analysis and research. Based on mode-locked or direct modulation method to achieve pulse-repetition rate multiplication, we can only get pulse train with low-frequency. Especially in the modern society with high-speed communications networks, the amount of information and higher speed has been required. Therefore, in order to generate high frequency pulse train, ultra-short pulse-repetition rate multiplication research develops rapidly and widely spreads. Based on time-domain method, this article uses an optical spectral periodic filter to achieve ultra-short pulse-repetition rate multiplication research.Firstly, we summarize the history of the pulse-repetition rate multiplication technology, and the development conditions of pulse-repetition rate multiplication research on abroad. In particular, we focus on the analysis of time domain method, then the relationship between the output pulse train with the optical filter and the input pulse train. It is the basic theory of ultra-short pulse-repetition rate multiplication researchSecondly, we analyze the single-stage Mach-Zehnder interferometer output spectrum by the transfer matrix method. The output spectrum of a single-stage Mach-Zehnder interferometer with different coupling ratio, different interferometer arm length or different the effective refractive values is analyzed. Then, we use the Mach-Zehnder interferometer to achieve ultra-short pulse-repetition rate multiplication research.Finally, we use the transfer matrix method to systematically analyze the output transmission spectrum of series-coupled micro-ring resonator. The transmission spectrum characteristics research of the single-ring and series-coupled double-ring resonator is the key to the study of pulse-repetition rate multiplication based on micro-ring resonator. The influence of different micro-ring radius, different coupling coefficient of the micro-ring resonator, or different number of micro-ring to the transmission spectrum of series-coupled micro-ring resonator is analyzed. Then, the micro-ring resonator is coupled in series with different parameters to achieve ultra-short pulse-repetition rate multiplication, and compare the effect to ultra-short pulse-repetition rate multiplication. The effect of ultra-short pulse pulse-repetition rate multiplication by Mach-Zehnder interferometer and ultra-short pulse pulse-repetition rate multiplication by optical micro-ring resonators are compared simply.