摘要
为了给太赫兹源、太赫兹探测器等太赫兹仪器的研制和生产提供测试保障,研制了一种基于锁相放大原理的太赫兹功率测试仪器。目前,许多商用锁相放大器价格高、体积大且结构和功能比较复杂,不适合一些便携式检测系统。该仪器主要采用基于AD630的锁相放大方案来实现对微弱信号的检测。这种锁相放大器成本低、设计结构简单、灵活性强且集成度高。当标准太赫兹功率计测试到的太赫兹功率为96.8 mW和2.98μW时,采用本文方案研制的太赫兹功率测试仪器测试到的功率分别为97.9 mW和3μW,误差范围在±5%以内。基于CD552-R3弱信号锁相放大方案只能提取到毫伏级信号,而本文方案则可提取到微伏级信号。因此,采用本文方案探测太赫兹功率时,量程更宽且稳定性更高。
In order to provide testing support for the development and production of terahertz instruments such as terahertz source and terahertz detector,a terahertz power measuring instrument based on phase-locked amplification principle is developed.At present,many commercial phase-locked amplifiers are expensive,bulky and complex in structure and function,which are not suitable for some portable detection systems.The instrument mainly uses a phase-locked amplification scheme based on AD630 to monitor weak signals.AD630 phase-locked amplifier has low cost,simple design structure,strong flexibility and high integration.When the terahertz power measured by the standard terahertz power meter is 96.8 mW and 2.98μW,the power measured by the terahertz power measuring instrument developed in this paper is 97.9 mW and 3μW respectively,and the error range is within±5%.The phase-locked amplification scheme based on CD552-R3 weak signal can only extract millivolt level signals,while the scheme in this paper can extract microvolt level signals.Therefore,the proposed scheme is used to detect terahertz power with a wider range and higher stability.
作者
谭景甲
徐玉华
吕振川
赵鑫
TAN Jing-jia;XU Yu-hua;LYU Zhen-chuan;ZHAO Xin(Ceyear Technologies Co.,Ltd.,Qingdao 266000,China)
出处
《红外》
CAS
2023年第1期39-46,共8页
Infrared
作者简介
谭景甲(1992-),男,山东聊城人,硕士,主要从事FPGA硬件开发、微弱信号检测以及光通信测试仪器等方面的研究。E-mail:1131841611@qq.com。
