红外纳秒激光脉冲在光纤中传输特性研究

为了提高激光时间波形测量系统的抗干扰能力,建立了激光脉冲在光纤中的传输物理模型,分析了纳秒脉冲在光纤中的线性传输特性,对影响脉冲传输特性的因素进行了系统评价。采用空气与光纤传输进行比对的方法,实验测试了激光脉冲经过不同长度的单模和多模光纤传输后的脉冲波形,得到脉冲展宽在允许的测量误差范围内所需的阈值条件。结果表明,该研究对神光-Ⅲ主机激光脉冲时间波形测量的设计具有重要的意义。

Research of propagating characteristics of ultraviolet laser pulse in optical fiber

In order to satisfy the measurement requirement of ultraviolet pulses in a large laser system, with a single mode ultraviolet fiber propagating and sampling the signal, the characteristics of the ultraviolet pulse propagating in linear media were analyzed in theory, and the factors affecting the measurement of the pulse shape were reviewed systematically. . The pulse profiles were measured after the ultraviolet pulse propagating a single-mode pure silica fiber. It is shown that single-mode ultraviolet fiber is a preferable medium for nanosecond pulse. An ultraviolet fiber is not suitable for long distance transmission considering the great loss and the limitation of the sensitivity of the detector. These results are significant for the design of pulse profile measuring system of high power laser facility.