基于DDS技术的F-P滤波器非线性补偿设计  

The Nonlinear Compensation Design of Tunable F-P Filter Based on DDS Technology

作　　者：马游春[1,2] 苏庆庆[1,2] 姜德[1,2] 丁红晖[1,2] MA Youchun;SU Qingqing;JIANG De;DING Honghui(National Key Lab.for Electronic Measurement Technology,North University of China,Taiyuan 030051,China;Key Lab.of Instrumentation Science&Dynamic Measurement of Ministry of Education,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《压电与声光》2018年第2期296-299,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61275166)

摘　　要：设计了一种基于现场可编程门阵列(FPGA)控制的可调谐光纤法布里-泊罗(FFP)滤波器的光纤光栅解调系统。并根据FFP的扫描特性使用FPGA生成FFP驱动电源。针对FFP压电陶瓷(PZT)的非线性特性,通过在FPGA中使用直接频率合成(DDS)技术对其进行线性补偿。补偿后线性度达到0.997,离散差值对应于扫描波长漂移,该值从补偿前的1.117nm被有效地控制在0.2nm范围内。A fiber grating demodulation system is designed with the tunable fiber Fabry-Perot(FFP)filter controlled by the field-programmable gate array(FPGA).The field-programmable gate array(FPGA)is used to generate the driving power of FFP based on the scanning characteristics of FFP.Then,according to the nonlinear characteristics of FFP piezoelectric ceramics,the linear compensation is carried out by using the direct frequency synthesis technique in FPGA.The linearity is up to 0.997 after compensating.And the discrete difference corresponds to the scanning wavelength shift,which is effectively controlled within 0.2 nm from 1.117 nm before compensation.

关 键 词：光栅解调 现场可编程门阵列(FPGA) 可调谐滤波器 直接合成技术 线性补偿 

分 类 号：TN763[电子电信—电路与系统]