基于DFB腔注入锁定效应的可调谐光电振荡器（英文）

发布时间：2018-06-10 16:45

本文选题：光电子学 + 光电子器件　；参考：《光子学报》2017年05期

【摘要】：提出一种基于分布反馈光注入锁定效应的可调谐光电振荡器,其环路主要由马赫曾德尔调制器、光电探测器、环形器、分布反馈激光器和射频放大器顺接而成.分布反馈激光器是系统关键器件,通过分布反馈激光器光注入锁定效应,分布反馈腔在光域实现了微波光子滤波器功能,无需传统光电振荡器必须的射频带通滤波器.同时,由于分布反馈激光器注入锁定提高了环路Q值,因此系统可采用短环路结构,从而降低了光纤因温度敏感对微波信号稳定性的影响并减小了整个系统的尺寸.另外,通过调节注入光波长和功率可改变该微波光子滤波器的中心频率,从而可实现系统的可调谐性.理论分析了该光电振荡器的原理和微波光子滤波器的调谐性,在此基础上开展了实验验证.结果表明该光电振荡器能够产生18.7~21.6GHz的可调微波信号,在1kHz频偏处的相位噪声为-90dBc/Hz.
[Abstract]:A tunable optoelectronic oscillator based on distributed feedback optical injection locking effect is proposed. The loop is mainly composed of Mach Zehnder modulator, photoelectric detector, ring device, distributed feedback laser and RF amplifier. Distributed feedback laser is the key device in the system. Through the optical injection locking effect of the distributed feedback laser, the distributed feedback cavity realizes the function of microwave photonic filter in the optical domain without the RF bandpass filter required by the traditional optoelectronic oscillator. At the same time, because the injection locking of distributed feedback laser increases the loop Q value, the system can adopt a short loop structure, which reduces the influence of fiber temperature sensitivity on the stability of microwave signal and reduces the size of the whole system. In addition, the center frequency of the microwave photonic filter can be changed by adjusting the wavelength and power of the injected light, thus the tunability of the system can be realized. The principle of the optoelectronic oscillator and the tunability of the microwave photonic filter are analyzed theoretically. The results show that the optoelectronic oscillator can produce a tunable microwave signal of 18.7nm 21.6GHz, and the phase noise at 1kHz frequency offset is -90dBc / Hz.
【作者单位】：贵州大学大数据信息工程学院;贵州大学物理学院;
【基金】：Guizhou Province for Society Development(No.QianKeHe-2013-3125) the Overseas Returning Persons Technology and Innovation Foundation of Guizhou Province of China(No.2016-23) the National Natural Science Foundation of China(Nos.11264006,61465002)
【分类号】：TN752

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