All-optical image-reject frequency down-conversion based on cascaded electro-optical modulators

被引：17

作者：

Tu, Zhaoyang ^{[1
,2
]}

Wen, Aijun ^{[1
,2
]}

Zhang, Wu ^{[1
,2
]}

Xiu, Zhongguo ^{[1
,2
]}

Yu, Guocong ^{[1
,2
]}

机构：

[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian 710071, Shaanxi, Peoples R China

[2] Xidian Univ, Collaborat Innovat Ctr Informat Sensing & Underst, Xian 710071, Shaanxi, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2019年 / 430卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

RF photonics; Frequency conversion; Image rejection; Optical signal processing; PHOTONIC MIXERS; MICROWAVE;

D O I：

10.1016/j.optcom.2018.08.042

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An all-optical image-reject frequency down-converter based on cascaded modulators and a wavelength demultiplexer is presented. The radio-frequency (RF) and the local-oscillator (LO) signal are fed to a phase modulator and a dual-parallel Mach-Zehnder modulator, respectively. Using a wavelength demultiplexer, two down-conversion channels can be obtained. Quadrature phase difference between the two down-converted signals is achieved by properly setting the modulator bias. Image rejection can thus be realized based on Hartley architecture. Experimental results show that image rejection ratios of 32.5 dB in a 10-MHz instantaneous bandwidth and over 50 dB for a single frequency can be obtained. The scheme can be applied to antenna remoting applications, and a 25-km fiber transmission is demonstrated.

引用

页码：158 / 162

页数：5

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