【摘要】 报道了利用飞秒脉冲激光与非均匀微结构光纤相互作用中产生超连续光谱后在非均匀微结构光纤传输中双折射拍频现象的研究 .利用 35fs的飞秒激光脉冲在高双折射微结构光纤中的传输过程中直接观察到了拍频现象 .并利用有限元方法对该光纤进行了模拟计算分析 ,计算得出在 6 0 0nm处拍频长度为毫米量级 .所得结果与实验一致更多还原

【Abstract】 A random distributed microstructure fiber in which strong asymmetry was introduced around a pure-silica core was reported. Femtosecond laser pulses with duration of 35?fs from a Ti:sapphire laser oscillator were coupled into this fiber,and then periodic color rings were observed from the side of the fiber when the supercontinuum light propagated along the fiber. We attributed this phenomenon to the polarization beating of the supercontinuum light in this highly birefringent microstructure fiber. Measurement showed that the fiber had a beat length of approximately 1?mm at a central wavelength of 600?nm,which is in good agreement with the result of calculation. A new method is proposed to measure the beat length directly in a highly birefringent microstructure fiber.更多还原