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Chirp measurement of multimode Q-switched laser diode pulses by use of a streak camera and a grating monochromator

机译:使用条纹相机和光栅单色仪对多模调Q开关激光二极管脉冲进行rp测量

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We discuss spectrotemporal measurements of laser diode pulses performed with a streak camera and a grating monochromator to yield a precise evaluation of chirping effects in Q-switched multimode emissions. We experimentally illustrate several causes of errors, depending on the grating size and period as well as on the adjustment of the collimating lens at the monochromator output. An analytical formula is derived that allows us to relate the chirp amplitude to the inclination of the modal structures in the streak image. Two configurations are proposed for a practical determination of the chirp amplitude in multimode emissions. illustrations are provided with Q-snitched AlGaAs laser diodes that exhibit chirp amplitudes larger than the mode spacing. (C) 1998 Optical Society of America. [References: 9]
机译:我们讨论了使用条纹相机和光栅单色仪执行的激光二极管脉冲的光谱时间测量,以对调Q多模发射中的线性调频效应进行精确评估。我们通过实验说明了几种错误原因,具体取决于光栅的尺寸和周期以及单色仪输出处准直透镜的调整。导出一个解析公式,使我们可以将线性调频振幅与条纹图像中模态结构的倾斜度相关联。为了实际确定多模发射中的线性调频幅度,提出了两种配置。图中提供了Q编织的AlGaAs激光二极管,这些二极管的线性调频振幅大于模式间隔。 (C)1998年美国眼镜学会。 [参考:9]

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