整形高功率激光装置的任意电脉冲发生器设计

刘辉; 刘百玉; 白永林; 欧阳娴; 缑永胜; 郑锦坤

整形高功率激光装置的任意电脉冲发生器设计

1.
中国科学院西安光学精密机械研究所, 超快光电诊断技术重点实验室, 陕西西安 710119;
2.
中国科学院西安光学精密机械研究所, 瞬态光学与光子技术国家重点实验室, 陕西西安 710119;
3.
中国科学院研究生院, 北京 100049

详细信息

中图分类号: TN243
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出版历程
- 收稿日期: 2010-08-16
- 修回日期: 2010-10-23
- 刊出日期: 2011-02-25

Design of arbitrary waveform generator for shaping high power laser system

1.
Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China;
2.
State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China;
3.
Graduate University of Chinese Academy of Sciences,Beijing 100049,China

More Information

Author Bio:
LIU Hui(1986—), male, born in Linyi Shandong Province. He received his B.S degree in electrical engineering from South-Central University for Nationalities in 2008. Now he is working for M.S degree in Xi'an Institute of Optics and Precision Mechanics of CAS. His research interest is ultra-bandwidth pulse shaping technology. E-mail:liuhui@opt.ac.cn
LIU Bai-yu(1964—), male, born in Weinan Shanxi Province, researcher. He received his B.S degree from Tsinghua University in 1986. At present, he is a researcher in Xi'an Institute of Optics and Precision Mechanics of CAS. His research interest is ultrafast electronics. E-mail: liubaiyu@opt.ac.cn

LIU Hui(1986—), male, born in Linyi Shandong Province. He received his B.S degree in electrical engineering from South-Central University for Nationalities in 2008. Now he is working for M.S degree in Xi'an Institute of Optics and Precision Mechanics of CAS. His research interest is ultra-bandwidth pulse shaping technology. E-mail:liuhui@opt.ac.cn
LIU Bai-yu(1964—), male, born in Weinan Shanxi Province, researcher. He received his B.S degree from Tsinghua University in 1986. At present, he is a researcher in Xi'an Institute of Optics and Precision Mechanics of CAS. His research interest is ultrafast electronics. E-mail: liubaiyu@opt.ac.cn

摘要

摘要: 基于GaAs场效应管电压控制电流和开关的特性,设计了一种任意电脉冲发生器,并成功应用于激光脉冲整形装置。该电脉冲发生器利用超宽带窄脉冲触发多个GaAs场效应管,产生多路负脉冲,通过模拟延时线依次将各路负脉冲延迟一定时间后经微带线耦合输出多路负脉冲叠加的波形;通过多路不同幅度的脉冲堆积效应来获得形状任意可调的整形电脉冲。为了满足惯性约束聚变(ICF)实验中对电脉冲幅度不能过小的要求,在电路的输出端接入增益可调的超宽带电压放大器,使脉冲幅度达到实验要求。利用设计的任意电脉冲发生器实现了脉冲幅度0~5 V可调、脉宽0~10 ns可调、时域调节精度为330 ps,整形方波脉冲下降沿为330 ps、上升沿为240 ps。实验结果表明,将产生的电脉冲注入光波导调制器,可获得理想形状的整形激光脉冲,提高激光脉冲的输出能量。
- 任意波形发生器 /
- 高功率激光 /
- 微带线 /
- GaAs场效应管
Abstract: In order to improve the output power of a laser pulse in the Inertia Confinement Fusion(ICF) system, an Arbitrary Generator(AWG) is designed to shape the laser pulse with an ideal condition. The ultra-narrow pulse is used to trigger the GaAs Field Effect Transistor(FET) to generate multiple negative pulses. The different time delays for each pulse are introduced by transmitting it through an analog time delay wire. Finally, a micro-strip line is obtained to couple the pulses and to get the overlapped pulse shape. The gate bias on FET is used to determine the magnitude of pulse, so the arbitrary pulse is gotten by overlapping the multiple pulses with various magnitudes and time delays. To satisfy the high amplitude requirement of electrical pulse for the ICF system, an ultra-broad bandwidth and voltage tunable amplifier is applied to the output signals and the pulse amplitude is adjustable. The designed AWG generates a pulse waveform with amplitude between 0 and 5 V, pulse width less than 10 ns and a square waveform rising edge in 520 ps, falling edge in 790 ps. The experiment shows the shaped laser pulse is obtained based on the shaping electrical pulse.
- Arbitrary Waveform Generator(AWG) /
- high power laser /
- micro-strip line /
- GaAs Field Effect Transistor(FET)

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参考文献(1)

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