Dynamic range improvement of broadband microwave photonic links using a linearized single-sideband modulator
Dynamic range improvement of broadband microwave photonic links using a linearized single-sideband modulator
复制标题
使用线性化单边带调制器改善宽带微波光子链路的动态范围
DOI：
10.1016/j.optcom.2015.04.006
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发表时间：
2015-09
影响因子：
2.4
通讯作者：
Yun Liu
中科院分区：
文献类型：
--
作者：
Xuan Li;Shanghong Zhao;Zihang Zhu;Yongjun Li;Jing Zhao;Yun Liu
提出并实现了一种新型的线性化单边带调制器，用于产生光单边带（OSSB）信号，提高微波光子链路的动态范围。该调制器由位于上分支的双电极马赫-曾德尔调制器（DEMZM）和位于下分支的移相器（PS）组成。通过优化线性化调制器的光功率分配比和PS的相移，可以有效地抑制三阶互调失真（IMD 3），同时消除二阶失真分量。它是一种多倍频程线性化技术，可应用于宽带系统。仿真结果表明，在散粒噪声占主导的情况下，当接收光功率为2 dBm，带宽为1 Hz时，线性化调制器的无杂散动态范围（SFDR）为130 dB，比传统的DEMZM高22 dB。研究了调制器的有限消光比、PS的相位偏差和光纤的色散对线性化性能的影响。
A novel linearized single-sideband modulator is proposed and demonstrated to generate optical single-sideband (OSSB) signal and improve the dynamic range of microwave photonic links. The modulator is composed of a dual-electrode Mach–Zehnder modulator (DEMZM) lying on the top branch and a phase shifter (PS) lying on the bottom branch. By optimizing the optical power split ratio of the linearized modulator and the phase shift of the PS, the third-order inter-modulation distortion (IMD3) can be efficiently suppressed while the second-order distortion components are eliminated simultaneously. It is a multi-octave linearization technique which can be applied for broadband systems. Simulation results show that, the linearized modulator can provide a spurious-free dynamic range (SFDR) of 130 dB for a bandwidth of 1 Hz at the received optical power of 2 dBm assuming shot noise is the dominant noise contribution, which is 22 dB higher than the conventional DEMZM. The effects of the finite extinction ratio of modulator, the phase deviation of PS and the dispersion of fiber on the linearization performance are also investigated.
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影响因子：
3.8
作者：
P. Devgan;J. Diehl;V. Urick;C. Sunderman;K. Williams
通讯作者：
P. Devgan;J. Diehl;V. Urick;C. Sunderman;K. Williams
影响因子：
3.8
作者：
Yan Cui;Yitang Dai;Feifei Yin;Jian Dai;Kun Xu;Jianqiang Li;Jintong Lin
通讯作者：
Yan Cui;Yitang Dai;Feifei Yin;Jian Dai;Kun Xu;Jianqiang Li;Jintong Lin
影响因子：
3.8
作者：
Wangzhe Li;J. Yao
通讯作者：
Wangzhe Li;J. Yao
DOI：
10.1117/12.688999
发表时间：
2006-09
期刊：
--
影响因子：
--
作者：
Shangyuan Li;Xiaoping Zheng;Bingkun Zhou
通讯作者：
Shangyuan Li;Xiaoping Zheng;Bingkun Zhou
影响因子：
2.6
作者：
A. Karim;J. Devenport
通讯作者：
A. Karim;J. Devenport