Photonic Microwave Up-Conversion Link With Compensation of Chromatic Dispersion-Induced Power Fading

Photonic Microwave Up-Conversion Link With Compensation of Chromatic Dispersion-Induced Power Fading
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具有色散引起的功率衰落补偿的光子微波上变频链路

DOI:
10.1109/jphot.2019.2928031
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发表时间:
2019-08
影响因子:
2.4
通讯作者:
Zhang Yinling
Zhang Yinling
中科院分区:
工程技术4区
文献类型:
--
作者:
Chen Dan;Shang Tao;Liu Xiongchao;Li Gufeng;Zhang Yinling

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提出并论证了一种有效的倍频上变频方案,实现了高频微波信号的产生和色散功率衰落的补偿。该系统的结构是基于一个级联的Sagnac环和马赫-曾德尔调制器(MZM),其中相位调制器中使用的Sagnac环。在环路中,只有顺时针传播的光波被小的本振信号调制,而逆时针传播的光波由于速度失配而未被调制。输出信号分为两部分,一部分进入MZM,另一部分进入光移相器。中频信号被提供给MZM,MZM被偏置在其最小值点,然后实现载波抑制双边带。通过调节光学相移,可以在任何频率下补偿CDIPF。在仿真中,通过比较所提出的链路的频率响应与色散补偿,我们成功地证明了60和80公里的链路的功率衰落补偿的性能。因此,无杂散动态范围有效地提高了13.54 dB,在22.6 GHz的60公里的链路。
An effective scheme of frequency doubling up-conversion is proposed and demonstrated, which achieves the generation of high-frequency microwave signal and the compensation of chromatic dispersion-induced power fading (CDIPF). The system structure is based on a cascading of a Sagnac loop and a Mach–Zehnder modulator (MZM), where a phase modulator is used in the Sagnac loop. In the loop, only the clockwise propagating light wave is modulated by a small local oscillator signal, leaving the counter-clockwise propagating light wave unmodulated because of the velocity mismatch. The output signal is divided into two parts, one traveling into an MZM and the other entering an optical phase shifter. The intermediate frequency signal is supplied to the MZM, which is biased at its minimum point and then the carrier-suppressed double sideband is achieved. With the adjustment of the optical phase shift, the CDIPF can be compensated at any frequency. In the simulation, by comparing the frequency responses of the proposed link with and without dispersion compensation, we successfully demonstrate the performance of power fading compensation for 60- and 80-km link. Consequently, the spurious-free dynamic range is effectively improved by 13.54 dB at 22.6 GHz for 60-km link.
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