| 高速太赫兹时域光谱系统中平衡探测器的设计 |
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| 引用本文： | 张宏飞,苏 波,JONES David R,何敬锁,张存林.高速太赫兹时域光谱系统中平衡探测器的设计[J].太赫兹科学与电子信息学报,2019,17(5):755-759. |
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| 作者姓名： | 张宏飞 苏 波 JONES David R 何敬锁 张存林 |
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| 作者单位： | a.Key Laboratory of Terahertz Optoelectronics，Ministry of Education；b.Beijing Key Laboratory for Terahertz Spectroscopy and Imaging；c.Beijing Advanced Innovation Center for Imaging Theory and Technology；d.Department of Physics，Capital Normal University，Beijing 100048，China,a.Key Laboratory of Terahertz Optoelectronics，Ministry of Education；b.Beijing Key Laboratory for Terahertz Spectroscopy and Imaging；c.Beijing Advanced Innovation Center for Imaging Theory and Technology；d.Department of Physics，Capital Normal University，Beijing 100048，China,a.Key Laboratory of Terahertz Optoelectronics，Ministry of Education；b.Beijing Key Laboratory for Terahertz Spectroscopy and Imaging；c.Beijing Advanced Innovation Center for Imaging Theory and Technology；d.Department of Physics，Capital Normal University，Beijing 100048，China,a.Key Laboratory of Terahertz Optoelectronics，Ministry of Education；b.Beijing Key Laboratory for Terahertz Spectroscopy and Imaging；c.Beijing Advanced Innovation Center for Imaging Theory and Technology；d.Department of Physics，Capital Normal University，Beijing 100048，China and a.Key Laboratory of Terahertz Optoelectronics，Ministry of Education；b.Beijing Key Laboratory for Terahertz Spectroscopy and Imaging；c.Beijing Advanced Innovation Center for Imaging Theory and Technology；d.Department of Physics，Capital Normal University，Beijing 100048，China |
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| 基金项目： | 国家自然科学基金资助项目(61575131；61675138；61575130)；北京市教育委员会科技计划资助项目(SQKM201810028004) |
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| 摘 要： | 平衡探测器是直接探测太赫兹信号的器件，位于高速太赫兹时域光谱(THz-TDS)系统末端光信号检测部分，是将光学信号转变为模拟电信号的关键器件，其性能决定了测量出的THz信号的精确度。利用2个低噪声光电二极管串联，直接探测出2束激光的差值光电流，降低了探测噪声；选用增益带宽乘积为4 GHz的运算放大器对差值光电流进行两级放大，得到高动态范围的THz信号，提高了THz信号的探测速度，并测量了α-乳糖一水合物吸收峰，得到了和文献中相同的吸收峰。
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| 关 键 词： | 太赫兹时域光谱 异步采样 平衡探测器 放大器 |
| 收稿时间： | 2018/9/15 0:00:00 |
| 修稿时间： | 2019/1/15 0:00:00 |
Design of balanced detector in high speed THz-TDS system |
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| ZHANG Hongfei,SU Bo,JONES David R,HE Jingsuo and ZHANG Cunlin.Design of balanced detector in high speed THz-TDS system[J].Journal of Terahertz Science and Electronic Information Technology,2019,17(5):755-759. |
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| Authors: | ZHANG Hongfei SU Bo JONES David R HE Jingsuo and ZHANG Cunlin |
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