中国激光, 2020, 47 (3): 0301004, 网络出版: 2020-03-12
基于阵列透镜和光纤集束的调频脉冲波形测试技术 下载: 1114次
Frequency-Modulated Pulse Waveform Measurement Based on Lens Array and Fiber Bundle
激光光学 波形测量 阵列透镜 光纤集束 耦合效率 对比度 laser optics waveform measurement lens array fiber bundle coupling efficiency contrast ratio
摘要
提出了一种基于阵列透镜和渐变多模光纤集束的调频脉冲测试方法,该方法通过渐变折射率多模光纤提供较大的接收孔径,通过子孔径拼接方式取样降低取样光斑在光纤端面的漂移,两者相结合可实现光束近场能量到光纤集束的高效稳定耦合。该方法中的渐变多模光纤集束可携带更多的取样光能量,有利于脉冲的高对比度测量。实验结果表明,本技术方案能够实现调频脉冲光束整体时间特性的保真测量,测量对比度可达630∶1。
Abstract
This study proposes a method based on lens array and fiber bundle for measuring frequency-modulated pulse waveforms. Grade-index fiber can provide a large receiver aperture that allows optimum laser energy transmission and performing measurements a wide dynamical range. Lens array can decrease the drift of laser spot on the fiber end face. Combining these two benefits, the system will have a high transmission efficiency from the laser near field to the fiber bundle. Results indicate that the proposed method can perform high-accuracy measurements of frequency-modulated pulse waveforms, with the measurement contrast ratio reaching 630∶1.
张波, 彭志涛, 孙志红, 夏彦文, 卢宗贵, 董军. 基于阵列透镜和光纤集束的调频脉冲波形测试技术[J]. 中国激光, 2020, 47(3): 0301004. Zhang Bo, Peng Zhitao, Sun Zhihong, Xia Yanwen, Lu Zonggui, Dong Jun. Frequency-Modulated Pulse Waveform Measurement Based on Lens Array and Fiber Bundle[J]. Chinese Journal of Lasers, 2020, 47(3): 0301004.