The Theoretical And Experimental Study Of The Short Optical Pulse

An optical pulse source is one of the most essential technologies of optical fiber communication systems. Fiber lasers may become the prime pulse sources in the future, because of their advantages: high transform efficiency, low threshold, simple structure as well as tunable wavelength. However, the deficiency of the pulse width and stability may limit further application of fiber lasers someday, especially when the high-capacity optical fiber communication system is developing so quickly.This thesis, focuses on the stable short optical pulse source and both the pulse compression and the stability methods are studied theoretically and experimentally. Some novel methods have been proposed.In the first part, the essential theory of the fiber laser is discussed first, and then we get a short pulse train (with the width of 50ps) in the experimental study of the actively mode-locked fiber.A novel stability method is proposed for the first time in the chapter followed, due to the nonlinear polarization rotation effect (NPR), which is induced by a photonic crystal fiber (PCF), we can obtain a more stable and average pulse train experimentally.Diverse pulse compression methods are studied theoretically, numerically and experimentally in the last part, including the chirp-dispersion compression method and the comb-like dispersion profile fiber (CDPF) pulse compression method. What's more, the optimized structure of the CDPF is proposed for the first time, and a reasonable result is achieved in the experiment. Moreover, we also arrive at the conclusion that the CDPF pulse compression method performs the best as compared with others.