【摘要】 报道了采用预置法使石英光纤中产生二次谐波及由透射电子显微镜观察预置前后光纤内部物质结构变化的实验结果．发现石英光纤中存有少量晶体，正是它们在预置前后的结构变化导致了二次谐波的产生．更多还原

【Abstract】 We report the experimental resultS of second-harmonic seneration (SHG) in the silica optical fiber using the prepared method and the microstructure change inner the fiber observed by the transmission electron microscope (TEM). A little of crystal in the fiber is observed. It is the structure change in the crystals after prefered the fiber that induced SHG.更多还原