Linearized analog photonic down-conversion link based on a dual-polarization quadrature phase-shift keying modulator

被引：0
|
作者：
Shan, Dongjuan [1 ]
Wen, Aijun [1 ]
Zhai, Weile [1 ]
Tian, Bo [1 ]
Zhang, Wen [1 ]
机构：
[1] Xidian Univ, State Key Lab Integrated Serv Networks, 2 South Taibai Rd, Xian 710071, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2020年 / 475卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Microwave photonics; Linearization; SFDR; Frequency down-conversion; MICROWAVE; DOWNCONVERSION; SFDR;
D O I：
10.1016/j.optcom.2020.126275
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A novel linearized analog photonic down-conversion link based on an integrated dual-polarization quadrature phase-shift keying (DP-QPSK) modulator is proposed and experimentally verified. Radio frequency and local oscillator signals are fed into the DP-QPSK modulator via an electrical attenuator, respectively. By adjusting the ratio of the two attenuators, the third-order intermodulation distortion can be eliminated based on balanced detection. The scheme is simple and compact and it achieves full spectrum utilization because of using no filter. Experimental results show that the spurious free dynamic range is improved by 16.43 dB for a two-tone signal and the error vector magnitude is improved by 6.16% for a 100-MSym/s 16-quadrature-amplitude-modulation signal.
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页数：6
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