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高线性波分复用模拟光链路的设计及实现 被引量:3

Design and Implementation of High-Linearity Wavelength Division Multiplexing Analog Optical Link
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摘要 面向多路射频模拟信号的高线性传输需求,基于强度调制-直接探测的原理,提出了基于波分复用技术的模拟射频光传输方案;利用高线性度模拟直调半导体激光器、波分复用器、模拟光电探测器,设计了基于微波光子技术的波分复用射频光传输链路,该链路具有低串扰、低失真、链路增益可调等性能。利用该链路进行了直调激光器、驱动控制电路、射频光发射模块和光接收模块的样机研制。对所研制出的样机进行了实验测试。测试结果表明:通道增益可在-30~10 dB调谐,通道内基波与二次谐波抑制比高于50 dB,相邻及非相邻通道间射频串扰均低于60 dB,相位一致性在±5°以内。针对不同的信号输入功率,在线调整链路增益,改善链路的信噪比或非线性失真效应。设计和研制的样机可用于低频段射频信号的光纤传输。 To meet the transmission demand of radiofrequency(RF)signals,a radiooverfiber(RoF)transmission link was designed based on an intensitymodulation/directdetection scheme,employing highlinearity directly modulated semiconductor lasers,array waveguide gratings,and analog photodetectors.This link achieves low crosstalk,low harmonic distortion,and a variable link gain.Directly modulated semiconductors and control circuits,an analog RF transmitter,and receiver modules are designed and fabricated.Experimental results indicate that the link gain can be tuned in the range of−30‒10 dB,the second harmonic suppression ratio exceeds 50 dB,the crosstalk among channels is lower than 60 dB,and the phase difference is within±5°.For different input RF powers,the link gain can be tuned online to improve the noise figure or to reduce the nonlinear distortions of the RoF link.This design and prototype can be used for Lband RF signal transmission.
作者 黄宁博 吴远大 Huang Ningbo;Wu Yuanda(School of Physics and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;Henan Shijia Photons Technology Co.,Ltd.,Hebi 458030,Henan,China)
出处 《激光与光电子学进展》 CSCD 北大核心 2023年第5期97-102,共6页 Laser & Optoelectronics Progress
基金 国家重点研发计划(2018YFB2200205)。
关键词 光纤通信 射频光传输 直调半导体激光器 模拟光链路 optical fiber communications radiooverfiber directlymodulated semiconductor lasers analog optical links
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