基于双通道马赫-曾德尔调制器调制边带滤波的微波光子移相器  

Microwave Photonic Phase Shifter Based on Dual-Parallel Mach-Zehnder Modulator Modulation Sideband Filtering

作　　者：郑鑫[1] 王翌[1] 卢春燕[1] 金晓峰[1] 章献民[1] 池灏[1] 郑史烈[1] 

机构地区：[1]浙江大学信息与电子工程系,浙江杭州310027

出　　处：《光学学报》2012年第12期239-243,共5页Acta Optica Sinica

基　　金：国家973计划(2012CB315703);国家科技支撑计划(2012BAH34B03);国家自然科学基金(60971060)资助课题

摘　　要：提出了一种基于双通道马赫-曾德尔调制器(DPMZM)调制边带滤波的微波光子移相器。在双通道马赫-曾德尔调制器的结构中,在一路马赫-曾德尔干涉仪上实现抑制光载波的双边带调制输出,而在另一路马赫-曾德尔的相位调节臂上通过调节偏置电压实现光载波信号的光学移相,两路光信号经过干涉合路后由光纤布拉格光栅(FBG)滤除其中一个一阶边带,最后输入到光电探测器(PD)进行光电转换得到移相的微波信号。实验结果表明,基于DPMZM调制边带滤波的微波光子移相器具有传输特性稳定、输出幅度波动小的优点。该结构还具有相移调节响应速度快、应用频带宽以及移相范围大于360°等特点。A novel microwave photonic phase shifter based on dual-parallel Mach-Zehnder modulator （DPMZM） modulation sideband filtering is proposed. Within the structure of DPMZM, one optical path with a Mach-Zehnder modulator is adjusted to be maintained at the state of optical-carrier-suppressed double-sideband modulation, and the other optical path is used to introduce an adjustable phase shift of the optical carrier by simply controlling the direct current （DC） bias voltage. The output of DPMZM passes through a fiber Bragg grating （FBG） for filtering out one first-order sideband of the modulation. A wideband photodetector is used to convert the output of FBG to electronic microwave signal of adjustable phase shift. The experimental results show that the proposed microwave photonic phase shifter based on DPMZM modulation sideband filtering has the advantage of stable transmission characteristics with small amplitude fluctuation, fast phase tuning response, wide frequency band and a phase shift greater than 360°.

关 键 词：光纤光学 光纤光栅 微波光子移相器 双通道马赫-曾德尔调制器 马赫-曾德尔干涉仪 

分 类 号：TN29[电子电信—物理电子学]