基于双平行强度调制的宽带多普勒频移测量  

Wide Range Doppler Frequency Shift Measurement Based on Dual-Parallel Mach-Zehnder Modulator

作　　者：张华林[1] 陈福昌[1] 余超群[1] 

机构地区：[1]闽南师范大学物理与信息工程学院,福建漳州363000

出　　处：《激光与光电子学进展》2015年第7期123-127,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61405086);漳州市自然科学基金(ZZ2013J02)

摘　　要：多普勒频移测量在电子战、雷达系统中有重要的应用。电域测量方法存在带宽受限、抗电磁干扰能力弱的缺陷。提出并实验验证一种光辅助法测量多普勒频移,在光域,采用双平行强度调制器进行光双边带载波抑制调制、光带通滤波、低频光电转换,最后在电域进行低频频谱分析,从而实现多普勒频移测量,有效解决了电域测量方法的缺陷。实验结果表明,在微波/毫米波频率7~40 GHz、多普勒频移1 k Hz^10 MHz实现了误差±46 Hz的多普勒频移测量。Doppler frequency shift measurement is widely used in electronic warfare and radar system. Measurement in electric domain suffers from narrow range and weak electro-magnetic interference resistance. This paper proposes and experimentally demonstrates an optics-assisted Doppler frequency shift measurement approach, which employs dual-parallel Mach-Zehnder modulator for double sideband carrier modulation, band pass filtering and low-frequency photoelectric conversion in optical domain, then analyses the low-frequency spectrum in electric domain, showing an effectively solution to the disadvantages of measurement in electric domain. Experimental results shows a measurement at 7-40 GHz microwave/millimeter wave of 1 kHz-10 MHz Doppler frequency shift with measurement error of ±46 Hz.

关 键 词：测量 微波光子 双平行马赫-曾德尔强度调制 多普勒频移 

分 类 号：TN98[电子电信—信息与通信工程]